|
|
| """ |
| Contains 200 example coding multiple choice questions for the demo application, |
| organized by category. |
| """ |
|
|
| |
| CODING_EXAMPLES_BY_CATEGORY = { |
| "Python": [ |
| { |
| "question": "Which of the following is NOT a valid way to iterate through a list in Python?", |
| "choices": [ |
| "for item in my_list:", |
| "for i in range(len(my_list)):", |
| "for index, item in enumerate(my_list):", |
| "for item from my_list:", |
| ], |
| "answer": "D", |
| }, |
| { |
| "question": "In Python, what does the `__str__` method do?", |
| "choices": [ |
| "Returns a string representation of an object for developers", |
| "Returns a string representation of an object for end users", |
| "Converts a string to an object", |
| "Checks if an object is a string", |
| ], |
| "answer": "B", |
| }, |
| { |
| "question": "What is the output of this Python code: `print(list(filter(lambda x: x % 2 == 0, range(10))))`?", |
| "choices": [ |
| "[0, 2, 4, 6, 8]", |
| "[1, 3, 5, 7, 9]", |
| "[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]", |
| "[]", |
| ], |
| "answer": "A", |
| }, |
| { |
| "question": "What is the output of the following Python code?\nx = [1, 2, 3]\ny = x\ny.append(4)\nprint(x)", |
| "choices": ["[1, 2, 3]", "[1, 2, 3, 4]", "[4, 1, 2, 3]", "Error"], |
| "answer": "B", |
| }, |
| { |
| "question": "What is the correct way to check if two variables point to the same object in Python?", |
| "choices": ["is", "==", "equals()", "==="], |
| "answer": "A", |
| }, |
| { |
| "question": "What is the output of this Python code?\nprint(0.1 + 0.2 == 0.3)", |
| "choices": ["False", "True", "Error", "None"], |
| "answer": "A", |
| }, |
| { |
| "question": "In Python, what is a generator?", |
| "choices": [ |
| "A function that returns an iterator", |
| "A tool that creates new modules", |
| "A class that generates random numbers", |
| "A method for creating new objects", |
| ], |
| "answer": "A", |
| }, |
| { |
| "question": "In Python, what does the `*args` parameter do?", |
| "choices": [ |
| "Allows a function to accept a variable number of positional arguments", |
| "Makes arguments optional", |
| "Multiplies all arguments", |
| "Unpacks a dictionary into keyword arguments", |
| ], |
| "answer": "A", |
| }, |
| { |
| "question": "What is the output of `print(2 ** 3 ** 2)` in Python?", |
| "choices": ["64", "36", "512", "None of the above"], |
| "answer": "C", |
| }, |
| { |
| "question": "What does the `collections.Counter` class in Python do?", |
| "choices": [ |
| "Counts occurrences of elements in an iterable", |
| "Implements a countdown timer", |
| "Tracks the number of function calls", |
| "Counts the number of objects in memory", |
| ], |
| "answer": "A", |
| }, |
| { |
| "question": "What is the output of `print(list(zip([1, 2, 3], [4, 5, 6, 7])))`?", |
| "choices": [ |
| "[(1, 4), (2, 5), (3, 6)]", |
| "[(1, 4), (2, 5), (3, 6), (None, 7)]", |
| "[(1, 4), (2, 5), (3, 6), (7, None)]", |
| "Error", |
| ], |
| "answer": "A", |
| }, |
| { |
| "question": "What is a Python decorator?", |
| "choices": [ |
| "A function that takes another function and extends its behavior", |
| "A design pattern for creating objects", |
| "A tool for formatting code", |
| "A class for implementing UI elements", |
| ], |
| "answer": "A", |
| }, |
| { |
| "question": "What is the output of `print([i for i in range(10) if i % 2 == 0])`?", |
| "choices": [ |
| "[0, 2, 4, 6, 8]", |
| "[1, 3, 5, 7, 9]", |
| "[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]", |
| "[]", |
| ], |
| "answer": "A", |
| }, |
| { |
| "question": "What is the purpose of `__init__.py` files in Python packages?", |
| "choices": [ |
| "To mark a directory as a Python package", |
| "To initialize variables when a package is imported", |
| "To document the package contents", |
| "To define package-level constants", |
| ], |
| "answer": "A", |
| }, |
| { |
| "question": "What is the output of `print(sum(range(5)))`?", |
| "choices": ["10", "15", "4", "Error"], |
| "answer": "A", |
| }, |
| ], |
| "JavaScript": [ |
| { |
| "question": "What is a closure in JavaScript?", |
| "choices": [ |
| "A function that remembers its lexical scope", |
| "A way to close browser windows", |
| "A method to terminate functions", |
| "A design pattern for security", |
| ], |
| "answer": "A", |
| }, |
| { |
| "question": "Which of these is NOT a JavaScript framework/library?", |
| "choices": ["React", "Angular", "Django", "Vue"], |
| "answer": "C", |
| }, |
| { |
| "question": "Which of these is a valid way to declare a constant in JavaScript?", |
| "choices": [ |
| "const PI = 3.14", |
| "constant PI = 3.14", |
| "final PI = 3.14", |
| "define PI = 3.14", |
| ], |
| "answer": "A", |
| }, |
| { |
| "question": 'What does the "this" keyword refer to in JavaScript?', |
| "choices": [ |
| "The current object", |
| "The parent object", |
| "The global window object", |
| "The function itself", |
| ], |
| "answer": "A", |
| }, |
| { |
| "question": "What is the difference between `==` and `===` in JavaScript?", |
| "choices": [ |
| "`==` checks equality with type conversion, `===` checks equality without type conversion", |
| "`==` checks reference equality, `===` checks value equality", |
| "`==` is used for numbers, `===` is used for strings", |
| "There is no difference", |
| ], |
| "answer": "A", |
| }, |
| { |
| "question": "What does the `async/await` feature do in JavaScript?", |
| "choices": [ |
| "Simplifies asynchronous programming", |
| "Creates multithreaded code", |
| "Prevents memory leaks", |
| "Optimizes rendering in browsers", |
| ], |
| "answer": "A", |
| }, |
| { |
| "question": "What is the main purpose of Redux in web development?", |
| "choices": [ |
| "State management", |
| "DOM manipulation", |
| "Server-side rendering", |
| "API communication", |
| ], |
| "answer": "A", |
| }, |
| { |
| "question": "Which of the following is NOT a primitive type in JavaScript?", |
| "choices": ["number", "string", "boolean", "array"], |
| "answer": "D", |
| }, |
| { |
| "question": "What is the output of `console.log(typeof null)` in JavaScript?", |
| "choices": ["'object'", "'null'", "'undefined'", "Error"], |
| "answer": "A", |
| }, |
| { |
| "question": "What is event bubbling in JavaScript?", |
| "choices": [ |
| "When an event triggers on an element and then propagates up to parent elements", |
| "When multiple events occur simultaneously", |
| "When events are queued for later execution", |
| "When events are canceled before execution", |
| ], |
| "answer": "A", |
| }, |
| { |
| "question": "What is the output of `console.log(1 + '2' + 3)` in JavaScript?", |
| "choices": ["'123'", "6", "'33'", "Error"], |
| "answer": "A", |
| }, |
| { |
| "question": "What is a JavaScript Promise?", |
| "choices": [ |
| "An object representing a future completion or failure of an asynchronous operation", |
| "A guarantee that a function will execute without errors", |
| "A contract between different parts of an application", |
| "A method for securing API endpoints", |
| ], |
| "answer": "A", |
| }, |
| ], |
| "SQL & Databases": [ |
| { |
| "question": 'What does the SQL function "ROUND()" do?', |
| "choices": [ |
| "Rounds a number to the nearest integer", |
| "Concatenates two or more strings", |
| "Converts a string to lowercase", |
| "Returns the length of a string", |
| ], |
| "answer": "A", |
| }, |
| { |
| "question": "What does ACID stand for in database systems?", |
| "choices": [ |
| "Atomicity, Consistency, Isolation, Durability", |
| "Associativity, Commutativity, Identity, Distributivity", |
| "Authentication, Cryptography, Integrity, Decentralization", |
| "Availability, Consistency, Integration, Distribution", |
| ], |
| "answer": "A", |
| }, |
| { |
| "question": "What is the purpose of normalization in databases?", |
| "choices": [ |
| "To reduce data redundancy and improve data integrity", |
| "To improve query performance", |
| "To encrypt sensitive data", |
| "To compress data and save storage space", |
| ], |
| "answer": "A", |
| }, |
| { |
| "question": "Which SQL statement is used to retrieve data from a database?", |
| "choices": ["SELECT", "FETCH", "GET", "RETRIEVE"], |
| "answer": "A", |
| }, |
| { |
| "question": "What does the SQL command `GROUP BY` do?", |
| "choices": [ |
| "Groups rows based on a column value", |
| "Sorts rows in ascending order", |
| "Filters rows based on a condition", |
| "Joins two tables", |
| ], |
| "answer": "A", |
| }, |
| { |
| "question": "What is the purpose of the `HAVING` clause in SQL?", |
| "choices": [ |
| "To filter groups that match a condition", |
| "To join tables", |
| "To select columns", |
| "To sort results", |
| ], |
| "answer": "A", |
| }, |
| { |
| "question": "What is a primary key in a database?", |
| "choices": [ |
| "A unique identifier for each record", |
| "The first column in a table", |
| "The fastest way to query data", |
| "A mandatory field in every table", |
| ], |
| "answer": "A", |
| }, |
| { |
| "question": "What is the difference between `DELETE` and `TRUNCATE` in SQL?", |
| "choices": [ |
| "`DELETE` can use WHERE condition, `TRUNCATE` removes all rows", |
| "`DELETE` is faster, `TRUNCATE` is slower", |
| "`DELETE` is for tables, `TRUNCATE` is for databases", |
| "`DELETE` is permanent, `TRUNCATE` can be rolled back", |
| ], |
| "answer": "A", |
| }, |
| { |
| "question": "Which of these is a NoSQL database?", |
| "choices": ["MongoDB", "MySQL", "PostgreSQL", "Oracle"], |
| "answer": "A", |
| }, |
| { |
| "question": "What is a foreign key in a relational database?", |
| "choices": [ |
| "A field that links to a primary key in another table", |
| "A key used for encryption", |
| "A key that must be unique across all tables", |
| "A backup key used when the primary key fails", |
| ], |
| "answer": "A", |
| }, |
| { |
| "question": "What is the purpose of an index in a database?", |
| "choices": [ |
| "To improve query performance", |
| "To enforce data integrity", |
| "To encrypt sensitive data", |
| "To compress data storage", |
| ], |
| "answer": "A", |
| }, |
| ], |
| "Algorithms & Data Structures": [ |
| { |
| "question": "What is the time complexity of binary search?", |
| "choices": ["O(1)", "O(log n)", "O(n)", "O(n²)"], |
| "answer": "B", |
| }, |
| { |
| "question": "Which data structure would be most efficient for implementing a priority queue?", |
| "choices": ["Array", "Linked List", "Heap", "Stack"], |
| "answer": "C", |
| }, |
| { |
| "question": "Which of these sorting algorithms has the worst worst-case time complexity?", |
| "choices": ["Merge sort", "Quick sort", "Heap sort", "Bubble sort"], |
| "answer": "D", |
| }, |
| { |
| "question": "In Big O notation, which of these is the most efficient?", |
| "choices": ["O(n²)", "O(n log n)", "O(n)", "O(1)"], |
| "answer": "D", |
| }, |
| { |
| "question": "What is a recursive function?", |
| "choices": [ |
| "A function that calls itself", |
| "A function that runs in the background", |
| "A function that cannot be modified", |
| "A function that returns multiple values", |
| ], |
| "answer": "A", |
| }, |
| { |
| "question": "Which algorithm is used for finding the shortest path in a weighted graph?", |
| "choices": ["Dijkstra's algorithm", "Binary search", "Quicksort", "Depth-first search"], |
| "answer": "A", |
| }, |
| { |
| "question": "Which of these sorting algorithms has the best average-case time complexity?", |
| "choices": ["Merge Sort", "Bubble Sort", "Insertion Sort", "Selection Sort"], |
| "answer": "A", |
| }, |
| { |
| "question": "Which data structure follows the LIFO (Last In First Out) principle?", |
| "choices": ["Stack", "Queue", "Linked List", "Tree"], |
| "answer": "A", |
| }, |
| { |
| "question": "What is the time complexity of inserting an element into a hash table?", |
| "choices": ["O(1) average case", "O(log n)", "O(n)", "O(n²)"], |
| "answer": "A", |
| }, |
| { |
| "question": "What is the space complexity of a recursive Fibonacci implementation?", |
| "choices": ["O(n)", "O(log n)", "O(1)", "O(2^n)"], |
| "answer": "A", |
| }, |
| { |
| "question": "What is the primary advantage of a B-tree over a binary search tree?", |
| "choices": [ |
| "Better performance with disk-based storage", |
| "Simpler implementation", |
| "Lower memory usage", |
| "Faster in-memory operations", |
| ], |
| "answer": "A", |
| }, |
| { |
| "question": "What is the worst-case time complexity of quicksort?", |
| "choices": ["O(n²)", "O(n log n)", "O(n)", "O(log n)"], |
| "answer": "A", |
| }, |
| { |
| "question": "Which data structure is most suitable for implementing a dictionary?", |
| "choices": ["Hash Table", "Array", "Linked List", "Stack"], |
| "answer": "A", |
| }, |
| { |
| "question": "What is the time complexity of breadth-first search on a graph?", |
| "choices": ["O(V + E)", "O(V * E)", "O(log V)", "O(V²)"], |
| "answer": "A", |
| }, |
| { |
| "question": "What is dynamic programming?", |
| "choices": [ |
| "A method for solving complex problems by breaking them into simpler subproblems", |
| "A programming paradigm that uses dynamic typing", |
| "A technique for automatically allocating memory", |
| "A method for optimizing code at runtime", |
| ], |
| "answer": "A", |
| }, |
| ], |
| "Web Development": [ |
| { |
| "question": "Which of these is NOT a RESTful API method?", |
| "choices": ["GET", "PUT", "SEARCH", "DELETE"], |
| "answer": "C", |
| }, |
| { |
| "question": "What does CSS stand for?", |
| "choices": [ |
| "Computer Style Sheets", |
| "Creative Style System", |
| "Cascading Style Sheets", |
| "Colorful Style Sheets", |
| ], |
| "answer": "C", |
| }, |
| { |
| "question": "Which protocol is used for secure web browsing?", |
| "choices": ["HTTP", "FTP", "HTTPS", "SMTP"], |
| "answer": "C", |
| }, |
| { |
| "question": "In CSS, which property is used to change the text color of an element?", |
| "choices": ["color", "text-color", "font-color", "text-style"], |
| "answer": "A", |
| }, |
| { |
| "question": "What is the purpose of the `useState` hook in React?", |
| "choices": [ |
| "To add state to functional components", |
| "To create side effects in components", |
| "To optimize rendering performance", |
| "To handle form submissions", |
| ], |
| "answer": "A", |
| }, |
| { |
| "question": "What does API stand for?", |
| "choices": [ |
| "Application Programming Interface", |
| "Automated Program Interaction", |
| "Application Process Integration", |
| "Advanced Programming Implementation", |
| ], |
| "answer": "A", |
| }, |
| { |
| "question": "What is JWT used for?", |
| "choices": [ |
| "Authentication and information exchange", |
| "JavaScript web testing", |
| "Java web toolkit", |
| "JSON web transformation", |
| ], |
| "answer": "A", |
| }, |
| { |
| "question": "Which of these is NOT a valid HTTP status code?", |
| "choices": [ |
| "200 OK", |
| "404 Not Found", |
| "500 Internal Server Error", |
| "600 Server Timeout", |
| ], |
| "answer": "D", |
| }, |
| { |
| "question": "What is the purpose of CORS in web development?", |
| "choices": [ |
| "To allow or restrict resources from being requested from another domain", |
| "To optimize CSS rendering", |
| "To compress HTTP responses", |
| "To validate HTML syntax", |
| ], |
| "answer": "A", |
| }, |
| { |
| "question": "What is the difference between localStorage and sessionStorage?", |
| "choices": [ |
| "localStorage persists after browser close, sessionStorage doesn't", |
| "localStorage has a smaller storage limit than sessionStorage", |
| "localStorage is encrypted, sessionStorage isn't", |
| "localStorage is for text only, sessionStorage can store objects", |
| ], |
| "answer": "A", |
| }, |
| { |
| "question": "What is the purpose of a service worker in web development?", |
| "choices": [ |
| "To enable offline functionality and background processing", |
| "To manage server-side rendering", |
| "To optimize database queries", |
| "To handle user authentication", |
| ], |
| "answer": "A", |
| }, |
| { |
| "question": "What is the purpose of the `<meta viewport>` tag?", |
| "choices": [ |
| "To control the viewport's size and scale for responsive design", |
| "To improve SEO rankings", |
| "To define metadata for social media sharing", |
| "To specify the character encoding of the document", |
| ], |
| "answer": "A", |
| }, |
| ], |
| "Software Engineering & DevOps": [ |
| { |
| "question": "Which design pattern is used when you need to create objects without specifying their concrete classes?", |
| "choices": [ |
| "Observer Pattern", |
| "Factory Pattern", |
| "Singleton Pattern", |
| "Decorator Pattern", |
| ], |
| "answer": "B", |
| }, |
| { |
| "question": 'In version control, what does "git rebase" do?', |
| "choices": [ |
| "Integrates changes from one branch onto another", |
| "Reverts all changes to the last commit", |
| "Creates a new branch", |
| "Deletes the remote repository", |
| ], |
| "answer": "A", |
| }, |
| { |
| "question": "What does the command `docker run` do?", |
| "choices": [ |
| "Creates and starts a container", |
| "Builds a Docker image", |
| "Lists running containers", |
| "Stops a running container", |
| ], |
| "answer": "A", |
| }, |
| { |
| "question": "What is the purpose of containerization technologies like Docker?", |
| "choices": [ |
| "To package applications with all dependencies", |
| "To create virtual machines", |
| "To encrypt sensitive data", |
| "To compress code for distribution", |
| ], |
| "answer": "A", |
| }, |
| { |
| "question": "What does MVC stand for in software architecture?", |
| "choices": [ |
| "Model-View-Controller", |
| "Multiple-Version-Control", |
| "Most-Valuable-Component", |
| "Managed-Virtual-Container", |
| ], |
| "answer": "A", |
| }, |
| { |
| "question": "What does the `git pull` command do?", |
| "choices": [ |
| "Fetches changes from a remote repository and merges them", |
| "Uploads local changes to a remote repository", |
| "Creates a new branch", |
| "Lists all commits", |
| ], |
| "answer": "A", |
| }, |
| { |
| "question": "What is the purpose of a load balancer?", |
| "choices": [ |
| "Distributes network traffic across multiple servers", |
| "Increases the speed of database queries", |
| "Manages memory allocation in applications", |
| "Compresses data before storage", |
| ], |
| "answer": "A", |
| }, |
| { |
| "question": "Which of these is NOT a principle of SOLID?", |
| "choices": [ |
| "Single responsibility", |
| "Open/closed", |
| "Liskov substitution", |
| "Dynamic typing", |
| ], |
| "answer": "D", |
| }, |
| { |
| "question": "What is the purpose of Continuous Integration (CI)?", |
| "choices": [ |
| "To automatically build and test code changes", |
| "To deploy applications to production", |
| "To monitor application performance", |
| "To manage database migrations", |
| ], |
| "answer": "A", |
| }, |
| { |
| "question": "What is the difference between CI and CD?", |
| "choices": [ |
| "CI is about integration and testing; CD is about delivery or deployment", |
| "CI is for code; CD is for databases", |
| "CI is manual; CD is automated", |
| "CI is for development; CD is for production only", |
| ], |
| "answer": "A", |
| }, |
| { |
| "question": "What is Infrastructure as Code (IaC)?", |
| "choices": [ |
| "Managing infrastructure through code and automation", |
| "Writing code that runs on multiple platforms", |
| "Converting legacy systems to modern code", |
| "Implementing code reviews for infrastructure teams", |
| ], |
| "answer": "A", |
| }, |
| { |
| "question": "What is the purpose of a Kubernetes pod?", |
| "choices": [ |
| "The smallest deployable unit that can contain one or more containers", |
| "A storage volume for container data", |
| "A network interface for container communication", |
| "A security policy for container isolation", |
| ], |
| "answer": "A", |
| }, |
| { |
| "question": "What is the purpose of a blue-green deployment?", |
| "choices": [ |
| "To reduce downtime and risk by running two identical environments", |
| "To separate development and production environments", |
| "To implement color-coded security levels", |
| "To optimize resource usage in cloud environments", |
| ], |
| "answer": "A", |
| }, |
| ], |
| "Programming Concepts": [ |
| { |
| "question": "What is the result of `5 & 3` in binary operations?", |
| "choices": ["1", "7", "8", "15"], |
| "answer": "A", |
| }, |
| { |
| "question": "What is the purpose of the `static` keyword in Java?", |
| "choices": [ |
| "It makes a variable or method belong to the class, not instances", |
| "It prevents a class from being inherited", |
| "It restricts access to a method or variable", |
| "It makes a variable unchangeable", |
| ], |
| "answer": "A", |
| }, |
| { |
| "question": "In OOP, what is encapsulation?", |
| "choices": [ |
| "The bundling of data and methods that operate on that data", |
| "The ability of a class to inherit from multiple classes", |
| "The hiding of implementation details", |
| "The ability of objects to take different forms", |
| ], |
| "answer": "A", |
| }, |
| { |
| "question": "Which language is primarily used for iOS development?", |
| "choices": ["Java", "Swift", "C#", "Kotlin"], |
| "answer": "B", |
| }, |
| { |
| "question": "What is the difference between TCP and UDP?", |
| "choices": [ |
| "TCP is connection-oriented; UDP is connectionless", |
| "TCP is secure; UDP is not", |
| "TCP is faster; UDP is more reliable", |
| "TCP is for web; UDP is for email", |
| ], |
| "answer": "A", |
| }, |
| { |
| "question": "Which of these is NOT a primitive data type in Java?", |
| "choices": ["int", "float", "String", "char"], |
| "answer": "C", |
| }, |
| { |
| "question": "What is a memory leak?", |
| "choices": [ |
| "Memory allocated that is never freed", |
| "When a program uses too much memory", |
| "When memory is corrupted by a virus", |
| "When cache memory overflows", |
| ], |
| "answer": "A", |
| }, |
| { |
| "question": "What is the purpose of the `virtual` keyword in C++?", |
| "choices": [ |
| "It allows a method to be overridden in derived classes", |
| "It makes a class abstract", |
| "It restricts a class from being instantiated", |
| "It optimizes method calls at compile time", |
| ], |
| "answer": "A", |
| }, |
| { |
| "question": "What is the key feature of a blockchain?", |
| "choices": [ |
| "Distributed immutable ledger", |
| "Centralized data storage", |
| "Fast transaction processing", |
| "Unlimited scalability", |
| ], |
| "answer": "A", |
| }, |
| { |
| "question": "Which protocol is used for sending emails?", |
| "choices": ["SMTP", "HTTP", "FTP", "SSH"], |
| "answer": "A", |
| }, |
| { |
| "question": "What is the difference between a thread and a process?", |
| "choices": [ |
| "Threads share memory space; processes have separate memory", |
| "Threads run on multiple CPUs; processes run on a single CPU", |
| "Threads are for I/O operations; processes are for computation", |
| "Threads are managed by the application; processes by the OS", |
| ], |
| "answer": "A", |
| }, |
| { |
| "question": "What is the purpose of a mutex?", |
| "choices": [ |
| "To ensure only one thread can access a resource at a time", |
| "To speed up multi-threaded operations", |
| "To allocate memory dynamically", |
| "To compress data for transmission", |
| ], |
| "answer": "A", |
| }, |
| { |
| "question": "What is the difference between a stack and a heap in memory management?", |
| "choices": [ |
| "Stack is for static memory allocation; heap is for dynamic allocation", |
| "Stack is slower; heap is faster", |
| "Stack is for global variables; heap is for local variables", |
| "Stack is managed by the OS; heap by the application", |
| ], |
| "answer": "A", |
| }, |
| ], |
| "C & C++": [ |
| { |
| "question": 'What is the output of this C code?\nint x = 5;\nprintf("%d", x++);\n', |
| "choices": ["5", "6", "4", "Error"], |
| "answer": "A", |
| }, |
| { |
| "question": "What is a pointer in C?", |
| "choices": [ |
| "A variable that stores the address of another variable", |
| "A variable that can point to multiple values", |
| "A function that returns multiple values", |
| "A special type of array", |
| ], |
| "answer": "A", |
| }, |
| { |
| "question": "What does the `const` keyword do in C++?", |
| "choices": [ |
| "Declares that a variable or function cannot be modified", |
| "Creates a constant expression", |
| "Defines a compile-time constant", |
| "All of the above", |
| ], |
| "answer": "D", |
| }, |
| { |
| "question": "What is the difference between `new` and `malloc` in C++?", |
| "choices": [ |
| "`new` calls constructors, `malloc` doesn't", |
| "`new` is faster than `malloc`", |
| "`new` is for arrays, `malloc` is for single objects", |
| "`new` is deprecated in modern C++", |
| ], |
| "answer": "A", |
| }, |
| { |
| "question": "What is the purpose of the `volatile` keyword in C?", |
| "choices": [ |
| "Tells the compiler that a variable may change unexpectedly", |
| "Makes a variable thread-safe", |
| "Prevents a variable from being optimized", |
| "Stores the variable in non-volatile memory", |
| ], |
| "answer": "A", |
| }, |
| { |
| "question": "What is a memory leak in C++?", |
| "choices": [ |
| "When memory is allocated with `new` but not freed with `delete`", |
| "When a program uses more memory than available", |
| "When memory is corrupted by buffer overflow", |
| "When memory is accessed after being freed", |
| ], |
| "answer": "A", |
| }, |
| { |
| "question": 'What is the output of this C code?\nint a = 10, b = 5;\nprintf("%d", a | b);\n', |
| "choices": ["15", "0", "5", "10"], |
| "answer": "A", |
| }, |
| { |
| "question": "What is the purpose of the `inline` keyword in C++?", |
| "choices": [ |
| "Suggests that the compiler replace function calls with the function body", |
| "Forces a function to be defined in a header file", |
| "Makes a function thread-safe", |
| "Prevents a function from being overridden", |
| ], |
| "answer": "A", |
| }, |
| { |
| "question": "What is the difference between a struct and a class in C++?", |
| "choices": [ |
| "Members are public by default in struct, private in class", |
| "Structs cannot have methods, classes can", |
| "Structs are for POD types, classes for objects", |
| "Structs cannot be inherited from, classes can", |
| ], |
| "answer": "A", |
| }, |
| ], |
| } |
|
|
