Interview Question,Real Work Job Analogue,Difference
What is SOLID?,Maintain and extend an object-oriented codebase following SOLID principles.,2
Explain the Single Responsibility Principle.,Refactor a class with multiple responsibilities.,2
Explain the Open/Closed Principle.,Extend existing functionality without modifying stable code.,2
Explain the Liskov Substitution Principle.,Design interchangeable implementations of interfaces.,2
Explain the Interface Segregation Principle.,Split large interfaces into focused abstractions.,2
Explain the Dependency Inversion Principle.,Use dependency injection in a production application.,2
What is encapsulation?,Design maintainable domain models.,1
What is inheritance?,Reuse behavior through existing frameworks and libraries.,2
What is polymorphism?,Implement interchangeable service implementations.,2
What is abstraction?,Design clean APIs and service boundaries.,2
What is composition over inheritance?,Build software using reusable components.,1
What is dependency injection?,Register and consume services using an IoC container.,1
What is inversion of control?,Configure application startup and dependency graphs.,2
What is an interface?,Design contracts between application components.,1
Abstract class vs interface?,Choose the appropriate abstraction while designing software.,2
What is method overriding?,Extend framework classes or application services.,1
Method overloading vs overriding?,Read and maintain existing object-oriented code.,2
What is immutability?,Design thread-safe value objects.,2
Mutable vs immutable objects?,Choose appropriate data models for concurrency.,2
What is object identity?,Work with ORM entities and domain models.,2
What is a linked list?,Use language collection libraries.,5
Reverse a linked list.,Manipulate collections using built-in APIs.,5
Detect a cycle in a linked list.,Debug graph-like relationships or dependency chains.,4
Merge two sorted linked lists.,Merge sorted business data.,4
Implement a stack.,Use built-in stack or deque collections.,5
Implement a queue.,Use standard queue implementations.,5
Implement a hash map.,Use language dictionary/map collections.,5
Implement a binary search tree.,Use indexed collections or database indexes.,5
Tree traversal.,Traverse hierarchical data structures.,3
Graph traversal.,Process dependency graphs or workflows.,3
Depth-first search.,Explore dependency trees.,3
Breadth-first search.,Traverse hierarchical application structures.,3
Binary search.,Search sorted business data.,2
QuickSort.,Use standard library sorting functions.,5
MergeSort.,Sort datasets using built-in APIs.,5
HeapSort.,Sort collections using existing libraries.,5
Bubble sort.,Use built-in sorting methods.,5
Selection sort.,Use built-in sorting methods.,5
Insertion sort.,Sort small in-memory collections.,4
Big O notation.,Estimate scalability of algorithms.,2
Time complexity.,Analyze application performance bottlenecks.,2
Space complexity.,Optimize memory-intensive code.,2
Recursion.,Implement tree or file-system traversal.,3
Dynamic programming.,Optimize specialized computational problems.,5
Greedy algorithms.,Optimize scheduling or allocation logic.,3
Backtracking.,Implement search or configuration generators.,4
Sliding window.,Process streams of sequential data.,3
Two pointers technique.,Iterate efficiently over ordered collections.,3
Kadane's algorithm.,Compute maximum values over sequences.,4
Longest common subsequence.,Compare document revisions or DNA-like sequences.,5
Binary tree height.,Work with hierarchical configuration trees.,3
Lowest common ancestor.,Navigate hierarchical object structures.,4
Topological sort.,Resolve dependency order in build systems.,2
Dijkstra algorithm.,Implement routing or shortest-path features.,4
Bellman-Ford algorithm.,Rare production graph optimization.,5
Floyd-Warshall algorithm.,Rare graph analytics tasks.,5
Union-Find.,Manage connected components in specialized systems.,5
Trie.,Implement autocomplete or prefix search.,3
Heap.,Use priority queues provided by libraries.,2
Priority queue.,Schedule jobs by priority.,2
Hash table collisions.,Understand hash-based collections.,3
Explain REST.,Design and consume REST APIs.,1
REST vs SOAP.,Integrate with external services.,2
What is HTTP?,Build web applications and APIs.,1
HTTP methods.,Implement REST endpoints.,1
PUT vs PATCH.,Implement update operations correctly.,1
GET vs POST.,Design HTTP endpoints.,1
HTTP status codes.,Debug API responses.,1
Cookies vs sessions.,Implement authentication flows.,2
JWT authentication.,Secure API endpoints.,1
OAuth2.,Integrate third-party authentication providers.,2
OpenID Connect.,Implement single sign-on.,2
What is CORS?,Configure frontend-backend communication.,1
What is CSRF?,Protect web applications against request forgery.,2
What is XSS?,Prevent cross-site scripting vulnerabilities.,2
What is SQL?,Write production database queries.,1
INNER JOIN.,Join relational tables in production.,1
LEFT JOIN.,Retrieve optional related records.,1
RIGHT JOIN.,Maintain legacy SQL systems.,2
FULL OUTER JOIN.,Query multiple relational datasets.,2
GROUP BY.,Generate reports and analytics.,1
HAVING.,Filter aggregated query results.,1
Indexes.,Optimize slow database queries.,1
Primary key.,Design relational schemas.,1
Foreign key.,Model relationships between tables.,1
Normalization.,Design maintainable databases.,2
Denormalization.,Optimize database performance.,2
Transactions.,Implement reliable business operations.,1
ACID.,Work with transactional databases.,2
Isolation levels.,Debug concurrency issues.,2
Deadlocks.,Investigate production database failures.,2
Stored procedures.,Maintain legacy enterprise databases.,3
Views.,Simplify repeated database queries.,1
Explain Git branching.,Collaborate on software projects.,1
Git merge vs rebase.,Maintain a clean project history.,2
Resolve merge conflicts.,Integrate concurrent code changes.,1
Cherry-pick in Git.,Move commits between branches.,2
Git tags.,Manage software releases.,1
Git bisect.,Debug regressions in source code.,2
Git hooks.,Automate repository workflows.,2
What happens during the Linux boot process?,Debug server startup failures.,3
What is a process?,Monitor running backend services.,1
What is a thread?,Debug multithreaded applications.,1
Process vs thread.,Design concurrent software.,2
What is a zombie process?,Investigate production server issues.,2
What is an orphan process?,Debug process management problems.,3
How does virtual memory work?,Investigate memory consumption.,3
What is paging?,Analyze application memory usage.,3
What is swapping?,Diagnose server performance degradation.,2
What is a context switch?,Optimize concurrent workloads.,3
User space vs kernel space.,Debug system-level problems.,3
What is a file descriptor?,Work with sockets and files.,2
How do pipes work?,Build shell automation scripts.,2
Signals in Linux.,Gracefully terminate services.,2
SIGTERM vs SIGKILL.,Stop production services correctly.,1
What is fork()?,Understand process creation.,3
What is exec()?,Understand Linux process execution.,3
How does malloc work?,Debug memory-intensive applications.,4
Memory leak.,Fix applications consuming excessive RAM.,1
Segmentation fault.,Debug native applications.,2
What is DNS?,Debug networking issues.,1
How does DNS resolution work?,Investigate connection failures.,2
What is TCP?,Develop reliable network applications.,1
TCP vs UDP.,Choose transport protocol.,2
Three-way handshake.,Debug connection establishment.,2
TLS handshake.,Secure application communication.,2
What is HTTPS?,Deploy secure APIs.,1
What is an IP address?,Configure infrastructure.,1
IPv4 vs IPv6.,Maintain cloud infrastructure.,2
What is NAT?,Configure cloud networking.,2
CIDR notation.,Configure VPC networking.,2
Subnet.,Design cloud networks.,2
Gateway.,Configure routing.,2
Load balancer.,Deploy scalable services.,1
Reverse proxy.,Deploy web applications.,1
Forward proxy.,Configure enterprise networking.,3
What is latency?,Measure service performance.,1
Bandwidth vs latency.,Diagnose slow applications.,2
Packet loss.,Investigate network instability.,2
What is a socket?,Implement network communication.,2
Docker image vs container.,Build containerized applications.,1
Dockerfile.,Package applications for deployment.,1
Docker volumes.,Persist application data.,1
Docker networking.,Connect application containers.,1
Docker Compose.,Run local development environments.,1
Multi-stage Docker build.,Optimize container images.,1
Container registry.,Publish deployment artifacts.,1
What is Kubernetes?,Deploy cloud-native applications.,1
Pod vs container.,Operate Kubernetes workloads.,1
ReplicaSet.,Maintain service availability.,1
Deployment.,Roll out application updates.,1
DaemonSet.,Deploy node-level services.,2
StatefulSet.,Deploy stateful databases.,2
ConfigMap.,Externalize application configuration.,1
Secret.,Manage credentials securely.,1
Ingress.,Expose HTTP services.,1
Service in Kubernetes.,Connect microservices.,1
Horizontal Pod Autoscaler.,Scale applications automatically.,2
Rolling update.,Deploy new software versions.,1
Blue-green deployment.,Reduce deployment downtime.,2
Canary deployment.,Gradually release new features.,2
Helm.,Manage Kubernetes applications.,1
What is CI/CD?,Automate software delivery.,1
Continuous Integration.,Automatically build and test code.,1
Continuous Delivery.,Prepare production releases.,1
Continuous Deployment.,Deploy automatically after testing.,2
Jenkins.,Maintain CI pipelines.,1
GitHub Actions.,Automate builds and releases.,1
GitLab CI.,Run automated pipelines.,1
Azure DevOps Pipelines.,Deploy enterprise applications.,1
Artifact repository.,Store build artifacts.,1
Infrastructure as Code.,Manage cloud infrastructure.,1
Terraform.,Provision cloud resources.,1
Ansible.,Automate server configuration.,1
What is AWS EC2?,Deploy virtual machines.,1
AWS S3.,Store application files.,1
AWS RDS.,Host relational databases.,1
AWS Lambda.,Build serverless applications.,2
AWS IAM.,Manage cloud permissions.,1
AWS VPC.,Configure cloud networking.,1
Azure Virtual Machine.,Deploy enterprise workloads.,1
Azure Functions.,Develop serverless solutions.,2
Azure Storage.,Store application data.,1
Azure Active Directory.,Manage enterprise authentication.,1
Google Cloud Compute Engine.,Deploy cloud services.,1
Google Cloud Storage.,Store application assets.,1
Google Kubernetes Engine.,Operate Kubernetes clusters.,1
Serverless computing.,Build event-driven applications.,2
Microservices.,Design distributed applications.,1
Monolith vs microservices.,Choose application architecture.,2
Message queues.,Implement asynchronous processing.,1
Apache Kafka.,Process event streams.,2
RabbitMQ.,Implement background job processing.,1
Redis.,Implement caching and session storage.,1
CDN.,Serve static assets efficiently.,1
Caching strategies.,Improve application performance.,1
Horizontal scaling.,Increase service capacity.,1
Vertical scaling.,Increase server resources.,1
Health checks.,Monitor service availability.,1
Observability.,Monitor production systems.,1
Distributed tracing.,Debug microservices.,2
Centralized logging.,Investigate production failures.,1
Prometheus.,Collect application metrics.,1
Grafana.,Visualize operational metrics.,1
OpenTelemetry.,Instrument distributed applications.,2
What is the JVM?,Deploy and troubleshoot Java applications.,2
What is the JDK?,Configure Java development environments.,1
JDK vs JRE.,Maintain Java runtime environments.,2
What is bytecode?,Understand Java application execution.,3
How does garbage collection work?,Investigate memory usage and GC pauses.,2
Heap vs Stack memory.,Debug memory-related production issues.,2
What causes OutOfMemoryError?,Diagnose application crashes caused by memory exhaustion.,1
Explain Java Memory Model.,Develop thread-safe backend applications.,3
What is a ClassLoader?,Debug dependency and startup issues.,3
Checked vs unchecked exceptions.,Design reliable exception handling.,1
Throw vs throws.,Implement exception handling.,1
What is finally?,Ensure resource cleanup.,1
Try-with-resources.,Safely manage files and database connections.,1
String vs StringBuilder.,Optimize string manipulation.,2
String pool.,Understand Java memory optimization.,3
Immutable String.,Design thread-safe code.,2
equals() vs ==.,Implement object comparison correctly.,1
hashCode().,Use HashMap and HashSet correctly.,2
Comparable vs Comparator.,Sort business objects.,1
Collections Framework.,Manipulate business collections.,1
ArrayList vs LinkedList.,Choose suitable collection types.,2
HashMap vs TreeMap.,Select appropriate map implementations.,2
HashSet vs TreeSet.,Store unique business objects.,2
ConcurrentHashMap.,Implement thread-safe caches.,2
Iterator.,Traverse application collections.,1
Streams API.,Process collections declaratively.,1
Optional.,Handle nullable values safely.,1
Lambda expressions.,Write concise backend logic.,1
Functional interfaces.,Use Streams and callbacks.,2
Method references.,Simplify Java code.,1
Default interface methods.,Extend framework APIs.,2
Reflection.,Build frameworks or dependency injection tools.,4
Annotations.,Configure Spring applications.,1
Generics.,Design reusable APIs.,2
Wildcards in Generics.,Maintain generic libraries.,3
Bounded Generics.,Develop reusable frameworks.,3
Serialization.,Persist or transmit Java objects.,3
Transient keyword.,Control object serialization.,3
Volatile keyword.,Develop concurrent services.,3
Synchronized keyword.,Protect shared state.,2
ReentrantLock.,Implement advanced concurrency.,3
wait() notify().,Coordinate worker threads.,4
ExecutorService.,Run background jobs.,1
CompletableFuture.,Implement asynchronous services.,2
ForkJoinPool.,Parallelize computational workloads.,3
Deadlock.,Debug multithreaded production systems.,2
Race condition.,Investigate concurrency bugs.,2
ThreadLocal.,Maintain request-scoped context.,2
Spring IoC.,Configure enterprise applications.,1
Spring Dependency Injection.,Register and inject application services.,1
Spring Bean lifecycle.,Debug application startup.,2
Spring Boot.,Develop REST APIs.,1
@SpringBootApplication.,Bootstrap Spring applications.,1
@Component.,Register application components.,1
@Service.,Implement business services.,1
@Repository.,Implement persistence layers.,1
@Controller.,Develop MVC applications.,1
@RestController.,Implement REST APIs.,1
@RequestMapping.,Map HTTP endpoints.,1
@GetMapping.,Implement GET endpoints.,1
@PostMapping.,Implement POST endpoints.,1
ExceptionHandler.,Handle API errors consistently.,1
Spring Profiles.,Configure environments.,1
Spring Configuration.,Manage application settings.,1
@ConfigurationProperties.,Bind external configuration.,1
Spring Security.,Secure REST APIs.,1
Spring Data JPA.,Implement repositories.,1
Hibernate.,Persist entities to relational databases.,1
Entity lifecycle.,Work with ORM entities.,2
Lazy loading.,Optimize database access.,2
Eager loading.,Avoid unnecessary queries.,2
N+1 query problem.,Optimize ORM performance.,1
JPQL.,Write ORM queries.,1
Criteria API.,Build dynamic database queries.,2
Transactions in Spring.,Implement reliable business logic.,1
@Transactional.,Manage database consistency.,1
Optimistic locking.,Prevent concurrent update conflicts.,2
Pessimistic locking.,Protect critical database operations.,2
Bean scopes.,Configure service lifetimes.,2
Prototype vs Singleton.,Design Spring services.,2
Circular dependency.,Resolve application startup issues.,2
REST client.,Consume external APIs.,1
Feign Client.,Integrate with microservices.,1
WebClient.,Implement reactive HTTP clients.,2
RestTemplate.,Maintain legacy integrations.,2
Jackson serialization.,Convert objects to JSON.,1
JSON mapping.,Exchange API payloads.,1
Validation annotations.,Validate API requests.,1
Bean Validation.,Ensure data integrity.,1
Maven.,Build Java projects.,1
Gradle.,Automate Java builds.,1
Dependency management.,Maintain project libraries.,1
Multi-module projects.,Organize enterprise applications.,2
Logging with SLF4J.,Investigate production problems.,1
Logback.,Configure application logging.,1
Spring Actuator.,Monitor production services.,1
Health endpoint.,Integrate monitoring systems.,1
Micrometer.,Collect application metrics.,1
JUnit.,Write automated unit tests.,1
Mockito.,Mock dependencies during testing.,1
Integration testing.,Verify service interactions.,1
Testcontainers.,Run database-backed tests.,1
What is the CLR?,Deploy and troubleshoot .NET applications.,2
What is the .NET runtime?,Maintain production .NET services.,2
.NET Framework vs .NET Core.,Choose the appropriate runtime for enterprise applications.,2
What is CIL (IL)?,Understand .NET application execution.,3
Value type vs reference type.,Design efficient application models.,2
Boxing vs unboxing.,Optimize performance-critical code.,3
What is garbage collection?,Investigate memory usage and application performance.,2
Generations in GC.,Diagnose GC pauses in production.,3
IDisposable.,Release unmanaged resources correctly.,1
using statement.,Safely manage files and database connections.,1
What is nullable reference types?,Prevent NullReferenceException in production code.,1
String vs StringBuilder.,Optimize string processing.,2
Record vs class.,Model immutable business entities.,1
Struct vs class.,Choose appropriate data models.,2
What is an interface?,Design service abstractions.,1
Abstract class vs interface.,Design extensible application architecture.,2
Extension methods.,Extend existing APIs cleanly.,1
Delegates.,Implement callback-based functionality.,2
Events.,Implement event-driven application behavior.,2
Lambda expressions.,Write concise LINQ queries.,1
LINQ.,Query collections and databases.,1
IEnumerable vs IQueryable.,Optimize Entity Framework queries.,2
Deferred execution.,Avoid unnecessary database calls.,2
yield return.,Implement efficient data streaming.,2
async/await.,Implement asynchronous APIs.,1
Task vs Thread.,Develop scalable backend services.,2
CancellationToken.,Support request cancellation.,1
lock statement.,Protect shared resources.,2
ConcurrentDictionary.,Implement thread-safe caches.,2
Monitor.,Synchronize multithreaded code.,3
SemaphoreSlim.,Limit concurrent resource usage.,2
Deadlock.,Debug multithreaded applications.,2
Race condition.,Investigate concurrency bugs.,2
Reflection.,Build frameworks or plugins.,4
Attributes.,Configure frameworks declaratively.,1
Generics.,Develop reusable libraries.,2
Covariance vs contravariance.,Maintain generic APIs.,3
Dependency Injection.,Register services in ASP.NET Core.,1
Service lifetime.,"Configure scoped, singleton, and transient services.",1
Middleware.,Implement request-processing pipelines.,1
Minimal APIs.,Develop lightweight REST services.,1
Controllers.,Implement REST endpoints.,1
Model binding.,Map HTTP requests to models.,1
Action filters.,Implement cross-cutting concerns.,2
Exception filters.,Provide centralized error handling.,2
Authentication.,Secure enterprise APIs.,1
Authorization.,Control access to application resources.,1
JWT authentication.,Protect REST APIs.,1
Identity.,Manage users and authentication.,1
Configuration.,Manage application settings.,1
Options pattern.,Bind strongly typed configuration.,1
Logging.,Investigate production issues.,1
Serilog.,Implement structured logging.,1
Dependency Injection container.,Configure enterprise applications.,1
Entity Framework Core.,Persist business entities.,1
DbContext.,Manage database access.,1
DbSet.,Query relational data.,1
Migration.,Evolve production databases.,1
Code First.,Develop new database-backed applications.,1
Database First.,Maintain legacy enterprise systems.,2
Tracking vs NoTracking.,Optimize query performance.,2
Lazy loading.,Reduce unnecessary database queries.,2
Eager loading.,Retrieve related entities efficiently.,2
Explicit loading.,Control entity loading behavior.,2
LINQ to Entities.,Write production database queries.,1
Raw SQL.,Optimize complex queries.,2
Transactions.,Maintain database consistency.,1
Optimistic concurrency.,Prevent conflicting updates.,2
Stored procedures.,Maintain enterprise databases.,3
ASP.NET Core pipeline.,Debug HTTP request flow.,2
Kestrel.,Host ASP.NET Core applications.,2
IHostedService.,Run background jobs.,1
BackgroundService.,Implement scheduled processing.,1
SignalR.,Develop real-time applications.,2
gRPC.,Build high-performance service communication.,2
Swagger/OpenAPI.,Document REST APIs.,1
Health checks.,Monitor application availability.,1
Caching.,Improve API performance.,1
MemoryCache.,Cache frequently accessed data.,1
Distributed cache.,Share cached data across servers.,2
Redis integration.,Implement scalable caching.,1
HttpClientFactory.,Consume external APIs reliably.,1
Polly.,Implement resilient network communication.,2
Retry policies.,Handle transient failures.,1
Circuit breaker.,Protect downstream services.,2
Unit testing.,Verify business logic automatically.,1
xUnit.,Write automated tests.,1
NUnit.,Maintain legacy test suites.,2
Moq.,Mock dependencies in tests.,1
Integration testing.,Verify application components together.,1
WebApplicationFactory.,Test ASP.NET Core APIs.,1
Dockerizing ASP.NET Core.,Deploy applications consistently.,1
Azure App Service.,Host enterprise applications.,1
Azure Functions.,Implement serverless workloads.,2
Azure Service Bus.,Implement asynchronous messaging.,2
Azure Key Vault.,Store secrets securely.,1
Application Insights.,Monitor production applications.,1
CI/CD for .NET.,Automate builds and deployments.,1
Versioning REST APIs.,Maintain backward compatibility.,1
What is JavaScript closure?,Maintain React hooks and callbacks.,2
What is lexical scope?,Debug variable visibility issues.,2
var vs let vs const.,Write modern JavaScript applications.,1
What is hoisting?,Debug initialization bugs.,2
What is the event loop?,Investigate asynchronous application behavior.,2
What is a Promise?,Consume asynchronous APIs.,1
Promise vs async/await.,Implement asynchronous frontend/backend logic.,1
What is callback hell?,Refactor nested asynchronous code.,2
What are microtasks?,Debug complex async execution order.,3
What are macrotasks?,Understand browser scheduling behavior.,3
What is this in JavaScript?,Maintain object-oriented JavaScript code.,2
Arrow function vs function.,Write modern JavaScript.,1
Function binding.,Fix callback context issues.,2
call vs apply vs bind.,Integrate third-party JavaScript libraries.,3
Prototype chain.,Debug inheritance behavior.,3
Class vs prototype.,Maintain ES6 applications.,2
Object.freeze.,Protect immutable configuration objects.,2
Deep copy vs shallow copy.,Prevent unintended object mutations.,2
Spread operator.,Merge application state.,1
Destructuring.,Write concise application code.,1
Rest parameters.,Build reusable utility functions.,1
Template literals.,Generate dynamic strings.,1
Modules.,Organize application code.,1
ES Modules vs CommonJS.,Maintain Node.js projects.,2
Tree shaking.,Optimize production bundles.,2
TypeScript interfaces.,Define application contracts.,1
Type aliases.,Model application data.,1
Interface vs type.,Choose appropriate TypeScript abstractions.,2
Generics in TypeScript.,Develop reusable frontend utilities.,2
Union types.,Represent business state.,1
Intersection types.,Compose application models.,2
Enums.,Represent fixed business values.,1
Optional chaining.,Safely access nested properties.,1
Nullish coalescing.,Provide default values.,1
Type narrowing.,Implement safe business logic.,2
Unknown vs any.,Maintain type safety.,2
Decorators.,Use framework metadata.,3
What is JSX?,Build React user interfaces.,1
Virtual DOM.,Understand React rendering.,2
React reconciliation.,Optimize rendering performance.,2
Functional components.,Develop React applications.,1
Class components.,Maintain legacy React applications.,2
React Hooks.,Implement component state.,1
useState.,Manage component state.,1
useEffect.,Handle side effects.,1
useMemo.,Optimize rendering performance.,2
useCallback.,Prevent unnecessary re-renders.,2
useRef.,Access DOM elements and mutable state.,1
Context API.,Share application state.,1
Redux.,Manage complex application state.,2
Redux Toolkit.,Implement scalable state management.,1
MobX.,Maintain enterprise React applications.,2
React Router.,Implement navigation.,1
Lazy loading.,Improve application startup time.,2
Code splitting.,Optimize frontend bundles.,2
Error boundaries.,Prevent application crashes.,2
Controlled components.,Implement web forms.,1
Uncontrolled components.,Integrate legacy UI libraries.,2
React keys.,Maintain stable list rendering.,1
Memoization.,Optimize rendering performance.,2
Next.js.,Build server-rendered React applications.,1
SSR vs CSR.,Choose rendering strategy.,2
Hydration.,Debug server-rendered applications.,3
Static Site Generation.,Deploy documentation and marketing sites.,2
Node.js event loop.,Develop backend services.,2
Express.js.,Build REST APIs.,1
Middleware in Express.,Implement request pipelines.,1
Route handlers.,Implement HTTP endpoints.,1
Body parsing.,Receive API requests.,1
Authentication middleware.,Secure APIs.,1
JWT in Node.js.,Implement authentication.,1
Environment variables.,Configure applications.,1
npm.,Manage project dependencies.,1
yarn vs npm.,Maintain JavaScript projects.,2
pnpm.,Optimize dependency management.,2
Package.json.,Configure JavaScript applications.,1
Semantic Versioning.,Maintain package compatibility.,1
Webpack.,Build production bundles.,2
Vite.,Develop modern frontend applications.,1
Babel.,Transpile JavaScript code.,2
ESLint.,Maintain code quality.,1
Prettier.,Enforce formatting consistency.,1
HTML semantic elements.,Build accessible web applications.,1
Accessibility (ARIA).,Develop inclusive user interfaces.,1
CSS Flexbox.,Create responsive layouts.,1
CSS Grid.,Design application layouts.,1
Responsive Design.,Support multiple screen sizes.,1
Media queries.,Implement adaptive layouts.,1
CSS specificity.,Debug styling conflicts.,2
CSS variables.,Maintain design systems.,1
Tailwind CSS.,Develop modern user interfaces.,1
Bootstrap.,Maintain enterprise frontend applications.,2
Cross-browser compatibility.,Test applications across browsers.,2
LocalStorage vs SessionStorage.,Persist client-side state.,1
Cookies.,Maintain authentication sessions.,1
WebSockets.,Implement real-time applications.,2
Fetch API.,Consume REST services.,1
Axios.,Integrate external APIs.,1
CORS.,Configure frontend-backend communication.,1
Frontend performance optimization.,Improve application responsiveness.,1
Lighthouse.,Measure web performance.,1
Progressive Web Apps.,Develop installable web applications.,2
Service Workers.,Enable offline functionality.,3
What are Python decorators?,Implement reusable logging and authentication.,2
What is a generator?,Process large datasets efficiently.,2
Generator vs list.,Optimize memory usage.,2
What is a Python iterator?,Iterate over custom collections.,2
What is __iter__?,Implement iterable business objects.,3
What is __next__?,Build custom iterators.,3
What are context managers?,Safely work with files and database connections.,1
What does with do?,Automatically release resources.,1
What is GIL?,Understand multithreaded Python performance.,3
List vs tuple.,Choose appropriate data structures.,1
Dictionary vs OrderedDict.,Maintain ordered mappings.,2
Set vs list.,Store unique business values.,1
Lambda functions.,Write concise transformation logic.,2
Map vs filter vs reduce.,Transform business collections.,2
List comprehensions.,Process collections concisely.,1
Dictionary comprehensions.,Build lookup structures.,1
Exception handling.,Build reliable applications.,1
Custom exceptions.,Represent domain-specific errors.,2
Multiple inheritance.,Maintain framework code.,3
MRO (Method Resolution Order).,Debug inheritance issues.,4
What is monkey patching?,Maintain legacy Python systems.,4
Shallow copy vs deep copy.,Prevent unintended mutations.,2
Mutable default arguments.,Avoid Python bugs.,2
*args and **kwargs.,Write reusable utility functions.,1
Type hints.,Improve code readability and tooling.,1
Dataclasses.,Model business entities.,1
NamedTuple.,Represent immutable data.,2
Enums.,Represent business constants.,1
Properties.,Expose validated object fields.,1
Descriptors.,Develop advanced libraries.,5
Metaclasses.,Develop frameworks.,5
AsyncIO.,Implement asynchronous services.,2
Coroutine.,Write asynchronous backend logic.,2
Await keyword.,Consume asynchronous APIs.,1
Threading module.,Run background tasks.,2
Multiprocessing.,Parallelize CPU-intensive workloads.,2
Queue module.,Coordinate worker processes.,2
Python packaging.,Publish reusable libraries.,2
Virtual environments.,Manage project dependencies.,1
pip.,Install project dependencies.,1
Poetry.,Manage Python projects.,1
Requirements.txt.,Pin project versions.,1
PyPI.,Consume third-party packages.,1
Django ORM.,Persist application data.,1
Django Models.,Design business entities.,1
Django Views.,Implement backend endpoints.,1
Django Templates.,Render server-side HTML.,2
Django Middleware.,Implement request processing.,1
Django Signals.,React to application events.,2
Django Admin.,Manage business data.,1
Django Authentication.,Secure web applications.,1
Django REST Framework.,Develop REST APIs.,1
Serializers.,Convert objects to JSON.,1
ViewSets.,Implement CRUD APIs.,1
Routers.,Organize REST endpoints.,1
Permissions.,Control API access.,1
Authentication classes.,Implement login mechanisms.,1
Flask.,Build lightweight APIs.,1
Blueprints.,Organize Flask applications.,1
Application factory.,Structure Flask projects.,2
FastAPI.,Develop modern REST APIs.,1
Pydantic.,Validate request models.,1
Dependency Injection in FastAPI.,Build modular APIs.,1
BackgroundTasks.,Run asynchronous processing.,2
Uvicorn.,Host FastAPI services.,1
Gunicorn.,Deploy Python web applications.,1
WSGI vs ASGI.,Choose deployment architecture.,2
Celery.,Implement background jobs.,1
Redis with Celery.,Coordinate distributed tasks.,1
Pandas DataFrame.,Analyze business datasets.,1
Merge DataFrames.,Combine business information.,1
GroupBy in Pandas.,Generate analytics.,1
Pivot tables.,Summarize business metrics.,1
NumPy arrays.,Perform numerical computations.,2
Vectorization.,Optimize data processing.,2
Matplotlib.,Generate engineering reports.,1
Plotly.,Create interactive dashboards.,2
OpenPyXL.,Generate Excel reports.,1
CSV module.,Process business data files.,1
JSON module.,Read and write API payloads.,1
Requests library.,Consume external APIs.,1
HTTPX.,Implement asynchronous HTTP clients.,1
BeautifulSoup.,Extract structured website data.,3
Selenium.,Automate browser interactions.,2
PyTest.,Write automated tests.,1
Fixtures in PyTest.,Share test setup.,1
Mocking.,Isolate dependencies during tests.,1
Coverage.,Measure test completeness.,1
Logging module.,Investigate production issues.,1
Environment variables.,Configure deployments.,1
Dockerize a Python app.,Deploy consistently.,1
SQLAlchemy.,Build database-backed applications.,1
Alembic.,Manage schema migrations.,1
Connection pooling.,Improve database performance.,2
Database transactions.,Maintain consistency.,1
Caching in Python.,Improve application performance.,1
LRU Cache.,Avoid repeated expensive computations.,2
Profiling Python code.,Find performance bottlenecks.,2
Memory profiling.,Investigate excessive memory usage.,2
What is database normalization?,Design maintainable relational schemas.,2
First Normal Form (1NF).,Design production database tables.,2
Second Normal Form (2NF).,Reduce duplicated business data.,2
Third Normal Form (3NF).,Maintain normalized relational databases.,2
BCNF.,Design complex enterprise databases.,3
When should you denormalize?,Optimize read-heavy applications.,2
Primary key.,Design relational schemas.,1
Foreign key.,Maintain data integrity.,1
Unique constraint.,Prevent duplicate business records.,1
Check constraint.,Validate stored business data.,1
Composite key.,Model many-to-many relationships.,2
Clustered index.,Optimize database access.,2
Non-clustered index.,Improve query performance.,2
Covering index.,Optimize frequently executed queries.,2
Composite index.,Support multi-column filtering.,2
Execution plan.,Diagnose slow SQL queries.,1
Why is my query slow?,Optimize production database performance.,1
Full table scan.,Investigate inefficient queries.,2
Index seek vs scan.,Tune database performance.,2
Cardinality.,Understand optimizer decisions.,3
INNER JOIN.,Retrieve related business records.,1
LEFT JOIN.,Return optional related data.,1
RIGHT JOIN.,Maintain legacy SQL systems.,2
FULL OUTER JOIN.,Merge independent datasets.,2
SELF JOIN.,Query hierarchical relationships.,2
CROSS JOIN.,Generate combinations for reporting.,3
UNION vs UNION ALL.,Combine datasets efficiently.,1
GROUP BY.,Generate reports.,1
HAVING.,Filter aggregated results.,1
Window Functions.,Produce rankings and analytical reports.,2
ROW_NUMBER().,Paginate business results.,2
RANK() vs DENSE_RANK().,Generate leaderboards and rankings.,2
LEAD().,Compare sequential business events.,2
LAG().,Analyze historical trends.,2
CTE (WITH).,Simplify complex SQL queries.,1
Recursive CTE.,Traverse hierarchical business data.,3
Subquery.,Build production SQL queries.,1
Correlated subquery.,Implement advanced reporting logic.,2
EXISTS.,Check related records efficiently.,1
IN vs EXISTS.,Optimize filtering queries.,2
ANY vs ALL.,Implement specialized filtering.,3
Stored procedure.,Maintain enterprise databases.,3
User-defined function.,Reuse database logic.,2
Trigger.,Automate database events.,3
View.,Simplify repeated queries.,1
Materialized View.,Optimize reporting systems.,2
Partitioning.,Scale very large databases.,2
Sharding.,Scale distributed databases.,3
Replication.,Improve availability.,2
Master-replica architecture.,Support read-heavy systems.,2
Database backup.,Protect production data.,1
Point-in-time recovery.,Restore production databases.,2
Transaction.,Implement reliable business operations.,1
ACID properties.,Ensure transactional consistency.,2
Isolation levels.,Handle concurrent transactions.,2
Dirty read.,Understand concurrency issues.,3
Non-repeatable read.,Debug concurrent updates.,3
Phantom read.,Maintain transactional correctness.,3
Deadlock.,Investigate production failures.,2
Optimistic locking.,Prevent update conflicts.,2
Pessimistic locking.,Protect critical data.,2
Connection pooling.,Improve backend scalability.,1
ORM vs raw SQL.,Choose appropriate persistence strategies.,2
N+1 problem.,Optimize ORM performance.,1
Pagination.,Implement scalable APIs.,1
Offset vs cursor pagination.,Scale APIs handling large datasets.,2
Soft delete.,Maintain audit history.,1
Audit logging.,Track business changes.,1
Database migrations.,Evolve production schemas.,1
Versioned migrations.,Coordinate team deployments.,1
REST API design.,Develop production APIs.,1
Resource naming.,Design intuitive endpoints.,1
HTTP idempotency.,Implement safe REST operations.,2
Idempotency keys.,Prevent duplicate payment requests.,2
Versioning APIs.,Maintain backward compatibility.,1
OpenAPI specification.,Document production APIs.,1
GraphQL basics.,Expose flexible APIs.,2
GraphQL vs REST.,Choose integration architecture.,2
Pagination in GraphQL.,Build scalable GraphQL services.,2
gRPC basics.,Implement efficient service communication.,2
Protocol Buffers.,Exchange structured service messages.,2
Webhooks.,Integrate external SaaS platforms.,1
Message queues.,Build asynchronous workflows.,1
Kafka consumer groups.,Scale event processing.,2
Kafka partitions.,Increase message throughput.,2
Exactly-once delivery.,Implement reliable messaging.,3
At-least-once delivery.,Build resilient distributed systems.,2
At-most-once delivery.,Optimize low-latency processing.,3
Event sourcing.,Maintain complete business history.,4
CQRS.,Separate read and write workloads.,4
Outbox pattern.,Guarantee reliable event publishing.,3
Saga pattern.,Coordinate distributed transactions.,4
API Gateway.,Manage microservice traffic.,1
Rate limiting.,Protect public APIs.,1
Circuit breaker.,Prevent cascading failures.,2
Bulkhead pattern.,Isolate service failures.,3
Retry pattern.,Handle transient errors.,1
Timeout strategy.,Improve service reliability.,1
Design Twitter.,Design a scalable internal social or messaging platform.,3
Design Facebook.,Design a large-scale collaborative application.,3
Design Instagram.,Design a media-sharing backend service.,3
Design YouTube.,Design a scalable video processing platform.,4
Design Netflix.,Design a distributed media delivery system.,4
Design WhatsApp.,Design a real-time messaging service.,3
Design Slack.,Design a team communication platform.,2
Design Discord.,Design a real-time communication system.,3
Design Uber.,Design a location-aware dispatch system.,4
Design Airbnb.,Design a booking platform with transactional workflows.,3
Design Dropbox.,Build a distributed file storage service.,4
Design Google Drive.,Implement cloud document storage.,4
Design Google Docs.,Build collaborative document editing.,5
Design TinyURL.,Develop an internal URL shortening service.,2
Design Bitly.,Implement scalable link management.,2
Design Pastebin.,Develop a text-sharing application.,2
Design Reddit.,Build a discussion platform.,3
Design Stack Overflow.,Implement a Q&A knowledge platform.,3
Design GitHub.,Design a collaborative code hosting platform.,4
Design Jira.,Develop issue tracking software.,2
Design Trello.,Implement a Kanban board application.,2
Design Zoom.,Develop a video conferencing platform.,5
Design Google Meet.,Implement real-time communication infrastructure.,5
Design Microsoft Teams.,Design enterprise collaboration software.,4
Design Spotify.,Develop a music streaming backend.,4
Design Amazon.,Build a scalable e-commerce platform.,3
Design an online banking system.,Implement secure financial workflows.,2
Design an ATM system.,Develop banking transaction services.,2
Design an online payment gateway.,Implement payment processing APIs.,2
Design PayPal.,Build secure payment infrastructure.,3
Design Stripe.,Develop payment processing services.,3
Design a notification service.,"Implement email, SMS, and push notifications.",1
Design an email service.,Build enterprise messaging infrastructure.,4
Design Gmail.,Develop scalable email systems.,5
Design a logging platform.,Build centralized logging infrastructure.,2
Design a monitoring system.,Implement production observability.,2
Design a metrics platform.,Collect and visualize operational metrics.,2
Design Prometheus.,Implement time-series monitoring.,3
Design a cache.,Implement Redis caching for production services.,1
Design Redis.,Develop an in-memory data platform.,4
Design Memcached.,Implement distributed caching.,3
Design a CDN.,Deploy global content delivery.,3
Design CloudFront.,Configure CDN infrastructure.,2
Design a search engine.,Implement enterprise search functionality.,5
Design Elasticsearch.,Deploy search infrastructure.,2
Design Solr.,Maintain enterprise search platforms.,3
Design a recommendation engine.,Develop personalized recommendation features.,4
Design a news feed.,Build timeline generation services.,4
Design a chat application.,Implement WebSocket-based communication.,2
Design a collaborative editor.,Develop collaborative business applications.,5
Design a scheduler.,Implement background job scheduling.,2
Design cron service.,Schedule recurring backend tasks.,2
Design a job queue.,Implement asynchronous processing.,1
Design Kafka.,Deploy distributed messaging infrastructure.,3
Design RabbitMQ.,Operate enterprise messaging systems.,2
Design an API Gateway.,Route traffic across backend services.,1
Design service discovery.,Implement dynamic microservice registration.,2
Design Consul.,Deploy service discovery infrastructure.,3
Design ZooKeeper.,Maintain distributed coordination systems.,4
Design Kubernetes control plane.,Operate Kubernetes clusters.,4
Design Docker Hub.,Implement container registry infrastructure.,4
Design CI/CD platform.,Develop deployment automation pipelines.,2
Design GitHub Actions.,Build workflow automation systems.,3
Design Jenkins.,Maintain build automation infrastructure.,2
Design a feature flag system.,Roll out software incrementally.,1
Design an A/B testing platform.,Implement controlled feature experiments.,2
Design a rate limiter.,Protect APIs from abuse.,2
Design a distributed lock.,Coordinate distributed services.,4
Design leader election.,Maintain high-availability systems.,4
Design consistent hashing.,Distribute requests across servers.,4
Design a distributed cache.,Scale cached application data.,3
Design object storage.,Develop cloud file storage.,4
Design blob storage.,Store large binary files.,3
Design audit logging.,Track sensitive business operations.,1
Design authentication service.,Implement centralized identity management.,2
Design authorization service.,Manage user permissions.,2
Design Single Sign-On.,Implement enterprise authentication.,2
Design OAuth platform.,Provide delegated authentication.,2
Design API key management.,Secure public APIs.,1
Design secrets management.,Store production credentials securely.,2
Design configuration service.,Centralize application configuration.,2
Design inventory system.,Build warehouse management software.,2
Design order processing.,Implement transactional commerce workflows.,2
Design warehouse management.,Develop logistics software.,2
Design supply chain platform.,Coordinate enterprise operations.,3
Design hospital management system.,Build healthcare information systems.,2
Design student information system.,Develop education management software.,2
Design CRM.,Implement customer relationship management.,2
Design ERP.,Develop enterprise resource planning software.,3
Design ticket booking system.,Implement reservation workflows.,2
Design ride-sharing backend.,Coordinate drivers and passengers.,4
Design IoT platform.,Collect and process device telemetry.,3
Design telemetry pipeline.,Process operational metrics.,2
Design analytics platform.,Generate business insights.,2
Design data warehouse.,Support enterprise reporting.,3
Design ETL pipeline.,Transform production business data.,2
Design event-driven architecture.,Implement asynchronous backend workflows.,2
Design microservices architecture.,Split monolithic applications into services.,2
Design scalable backend.,Architect production web services.,2
Design highly available system.,Improve application reliability.,2
CAP Theorem.,Choose database consistency strategies.,3
Explain Consistency in CAP.,Design distributed data storage.,3
Explain Availability in CAP.,Improve service uptime.,2
Explain Partition Tolerance.,Design resilient cloud systems.,3
Strong vs Eventual Consistency.,Select storage architecture.,3
Linearizability.,Design financial systems.,4
Consensus algorithms.,Maintain distributed coordination.,4
Raft algorithm.,Operate distributed databases.,4
Paxos algorithm.,Understand distributed consensus implementations.,5
Leader election.,Operate distributed clusters.,3
Distributed transactions.,Coordinate microservices.,3
Two-Phase Commit.,Maintain legacy distributed systems.,4
Three-Phase Commit.,Study distributed transaction protocols.,5
Saga Pattern.,Implement business workflows.,3
CQRS.,Separate read/write workloads.,4
Event Sourcing.,Maintain event-driven systems.,4
Outbox Pattern.,Guarantee reliable event publishing.,3
Inbox Pattern.,Prevent duplicate event processing.,3
Idempotency.,Build reliable APIs.,2
Exactly-once processing.,Implement payment pipelines.,3
At-least-once delivery.,Consume event streams.,2
At-most-once delivery.,Optimize telemetry ingestion.,3
Message ordering.,Maintain event processing correctness.,2
Kafka partitions.,Scale messaging throughput.,2
Kafka replication.,Improve message durability.,2
Consumer groups.,Scale event consumers.,1
Backpressure.,Prevent service overload.,2
Event-driven architecture.,Build asynchronous systems.,2
Pub/Sub architecture.,Integrate distributed services.,2
WebSockets at scale.,Develop real-time systems.,3
Long polling.,Maintain legacy real-time applications.,3
Server-Sent Events.,Push live updates to browsers.,2
Sticky sessions.,Configure load balancers.,2
Session replication.,Support multiple application servers.,2
Horizontal scaling.,Increase system capacity.,1
Vertical scaling.,Upgrade server resources.,1
Auto Scaling.,Configure cloud infrastructure.,1
Load balancing.,Distribute incoming traffic.,1
Health checks.,Detect unhealthy instances.,1
Circuit Breaker.,Prevent cascading failures.,2
Retry strategy.,Handle transient failures.,1
Exponential backoff.,Retry failed requests responsibly.,2
Bulkhead pattern.,Isolate failing components.,3
Fail Fast.,Terminate invalid requests early.,2
Graceful degradation.,Keep critical features available.,2
Chaos Engineering.,Validate production resilience.,3
Blue-Green Deployment.,Release software safely.,2
Canary Deployment.,Gradually deploy new versions.,2
Rolling Deployment.,Update services without downtime.,1
Feature Toggles.,Release incomplete functionality safely.,1
Database failover.,Recover from infrastructure failures.,2
Disaster Recovery.,Restore production environments.,2
RPO vs RTO.,Plan recovery objectives.,3
High Availability.,Design resilient services.,2
Fault Tolerance.,Reduce service interruptions.,2
Observability.,Monitor distributed systems.,1
Monitoring vs Logging.,Operate production systems.,1
Distributed tracing.,Debug microservices.,2
OpenTelemetry.,Instrument production services.,2
Prometheus metrics.,Monitor application health.,1
Grafana dashboards.,Visualize operational metrics.,1
SLIs.,Measure service quality.,2
SLOs.,Define engineering objectives.,2
SLAs.,Meet contractual uptime guarantees.,2
Latency percentiles.,Analyze production performance.,2
P50 vs P95 vs P99.,Interpret latency metrics.,3
Throughput.,Measure service capacity.,1
Tail latency.,Optimize user experience.,3
Connection pooling.,Improve backend efficiency.,1
Thread pools.,Optimize concurrent processing.,2
Async programming.,Build scalable services.,1
Locks.,Protect shared resources.,2
Read-write locks.,Improve concurrent performance.,3
Deadlocks.,Debug production failures.,2
Livelocks.,Investigate concurrency issues.,4
Race conditions.,Fix synchronization bugs.,2
Atomic operations.,Implement thread-safe code.,2
Memory barriers.,Understand concurrent execution.,4
False sharing.,Optimize high-performance systems.,5
CPU cache.,Investigate performance bottlenecks.,3
Cache locality.,Improve computational efficiency.,4
Garbage Collection tuning.,Optimize backend performance.,3
Heap profiling.,Diagnose memory leaks.,2
Memory fragmentation.,Investigate native application issues.,4
Flame graphs.,Analyze CPU utilization.,2
Profiling tools.,Optimize slow applications.,1
Benchmarking.,Measure software performance.,1
Stress testing.,Evaluate production capacity.,1
Load testing.,Validate scalability.,1
Soak testing.,Detect long-running stability issues.,2
Chaos testing.,Evaluate resilience under failures.,3
Rate limiting.,Protect backend APIs.,1
Token Bucket algorithm.,Implement API throttling.,3
Leaky Bucket algorithm.,Implement traffic shaping.,3
Bloom Filter.,Optimize membership checks.,4
Consistent hashing.,Distribute requests across nodes.,4
What is an LLM?,Use GitHub Copilot or ChatGPT during development.,1
What is Prompt Engineering?,Write effective prompts for AI coding assistants.,1
What is Retrieval-Augmented Generation (RAG)?,Build AI-powered search or knowledge systems.,2
What are embeddings?,Implement semantic search.,2
What is a vector database?,Deploy semantic search infrastructure.,2
Explain cosine similarity.,Rank semantic search results.,3
How does ChatGPT work?,Understand AI-assisted development tools.,2
How do transformers work?,Understand capabilities and limitations of LLMs.,4
Attention mechanism.,Understand modern AI architectures.,4
Fine-tuning vs prompting.,Choose AI customization strategy.,2
What is hallucination?,Validate AI-generated code.,1
Context window.,Manage large codebases with AI.,1
Few-shot prompting.,Improve AI responses.,2
Zero-shot prompting.,Use AI assistants effectively.,1
Chain-of-thought prompting.,Break down complex engineering tasks.,2
Function calling.,Integrate LLMs with software systems.,2
AI agents.,Build autonomous development workflows.,2
Model Context Protocol (MCP).,Integrate AI with developer tools.,2
Tool calling.,Connect AI systems with APIs.,2
Temperature in LLMs.,Tune AI output consistency.,2
Top-p sampling.,Configure generative AI behavior.,3
Prompt injection.,Secure AI applications.,2
AI code review.,Review pull requests with AI assistance.,1
GitHub Copilot.,Accelerate software development.,1
Code generation.,Generate boilerplate implementation.,1
AI-assisted debugging.,Investigate software defects.,1
AI-assisted testing.,Generate unit tests automatically.,1
AI-assisted documentation.,Produce technical documentation.,1
AI-assisted refactoring.,Modernize legacy code.,1
AI pair programming.,Collaborate with AI tools.,1
Explain Clean Code.,Write maintainable software.,1
Code smells.,Identify maintainability problems.,1
Refactoring.,Improve existing production code.,1
Technical debt.,Plan engineering improvements.,1
Cyclomatic complexity.,Measure code maintainability.,2
Code review best practices.,Review teammates' pull requests.,1
Pull request workflow.,Collaborate using Git.,1
Branching strategy.,Manage feature development.,1
Trunk-based development.,Organize team workflows.,2
GitFlow.,Maintain release processes.,2
Continuous refactoring.,Improve long-lived systems.,1
Domain-Driven Design.,Model complex business domains.,2
Bounded Context.,Separate business capabilities.,2
Aggregate Root.,Design domain models.,2
Repository Pattern.,Implement persistence abstraction.,2
Unit of Work.,Coordinate database changes.,2
Hexagonal Architecture.,Separate business logic from infrastructure.,2
Clean Architecture.,Structure enterprise applications.,2
Onion Architecture.,Maintain modular backend systems.,2
Layered Architecture.,Organize enterprise software.,1
Dependency Rule.,Reduce coupling between modules.,2
Inversion of Control.,Build extensible systems.,2
SOLID in practice.,Maintain object-oriented applications.,1
YAGNI.,Avoid unnecessary implementation.,1
KISS Principle.,Keep solutions simple.,1
DRY Principle.,Reduce duplicated logic.,1
Composition over inheritance.,Build reusable components.,1
Law of Demeter.,Reduce coupling between classes.,2
Design by Contract.,Specify application behavior clearly.,3
OWASP Top 10.,Develop secure web applications.,1
SQL Injection.,Prevent database attacks.,1
Cross-Site Scripting (XSS).,Sanitize user input.,1
Cross-Site Request Forgery (CSRF).,Protect authenticated requests.,1
Broken Authentication.,Implement secure login systems.,1
SSRF.,Protect backend infrastructure.,2
Remote Code Execution.,Prevent critical vulnerabilities.,2
Secure password storage.,Hash and salt user passwords.,1
HTTPS everywhere.,Deploy secure web applications.,1
Secrets management.,Protect API keys and credentials.,1
Least Privilege Principle.,Limit application permissions.,1
Principle of Defense in Depth.,Design secure systems.,2
Static code analysis.,Detect bugs automatically.,1
Dynamic analysis.,Test running applications.,2
Software Composition Analysis.,Identify vulnerable dependencies.,1
Dependency scanning.,Monitor third-party libraries.,1
Container scanning.,Secure Docker images.,1
SBOM.,Track software dependencies.,2
Observability.,Monitor production systems.,1
Root Cause Analysis.,Investigate production incidents.,1
Incident response.,Restore production services.,1
Postmortem analysis.,Learn from outages.,1
Blameless postmortem.,Improve engineering culture.,1
Error budgets.,Balance reliability and feature delivery.,2
Engineering metrics.,Measure team effectiveness.,2
DORA metrics.,Evaluate software delivery performance.,2
Mean Time To Recovery (MTTR).,Measure operational performance.,1
Deployment frequency.,Improve software delivery.,1
Lead time for changes.,Optimize engineering workflow.,1
Change failure rate.,Reduce deployment risk.,1
Feature flags.,Deploy features safely.,1
Dark launches.,Test new functionality gradually.,2
Backward compatibility.,Support existing users.,1
API deprecation strategy.,Retire old services safely.,1
Versioning strategy.,Maintain long-lived APIs.,1
Scalable architecture.,Design systems for future growth.,2
Maintainability.,Keep software easy to evolve.,1
Reliability engineering.,Operate production services.,1
Performance optimization.,Reduce latency and resource usage.,1
Debugging methodology.,Investigate software defects systematically.,1