quizes

{
  "quizzes": [
    {
      "id": 1,
      "question": "What is Kotlin's 'when' expression equivalent to in Java?",
      "options": [
        "if-else statement",
        "switch statement",
        "for loop",
        "while loop"
      ],
      "correctAnswer": "switch statement",
      "explanation": "Kotlin's 'when' expression is similar to Java's switch statement but more powerful, as it can handle any type of expression and doesn't require break statements.",
      "category": "Kotlin"
    },
    {
      "id": 2,
      "question": "What is the purpose of 'suspend' keyword in Kotlin?",
      "options": [
        "To pause the application",
        "To mark a function that can be paused and resumed",
        "To stop a thread",
        "To suspend the entire program"
      ],
      "correctAnswer": "To mark a function that can be paused and resumed",
      "explanation": "The suspend keyword is used to mark functions that can be paused and resumed later, making them suitable for use with coroutines for asynchronous programming.",
      "category": "Kotlin"
    },
    {
      "id": 3,
      "question": "What is Jetpack Compose?",
      "options": [
        "A database library",
        "A modern UI toolkit for Android",
        "A networking library",
        "A testing framework"
      ],
      "correctAnswer": "A modern UI toolkit for Android",
      "explanation": "Jetpack Compose is Android's modern toolkit for building native UI. It simplifies and accelerates UI development on Android using a declarative approach.",
      "category": "Android"
    },
    {
      "id": 4,
      "question": "What is the purpose of ViewModel in Android?",
      "options": [
        "To store UI-related data",
        "To handle database operations",
        "To manage network calls",
        "To create layouts"
      ],
      "correctAnswer": "To store UI-related data",
      "explanation": "ViewModel is designed to store and manage UI-related data in a lifecycle conscious way, surviving configuration changes like screen rotations.",
      "category": "Android"
    },
    {
      "id": 5,
      "question": "What is Room in Android?",
      "options": [
        "A UI component",
        "A database abstraction layer",
        "A networking library",
        "A memory management tool"
      ],
      "correctAnswer": "A database abstraction layer",
      "explanation": "Room is an abstraction layer over SQLite that provides easier database operations while ensuring compile-time verification of SQL queries.",
      "category": "Android"
    },
    {
      "id": 6,
      "question": "What is a Coroutine in Kotlin?",
      "options": [
        "A type of variable",
        "A lightweight thread for asynchronous programming",
        "A database operation",
        "A UI component"
      ],
      "correctAnswer": "A lightweight thread for asynchronous programming",
      "explanation": "Coroutines are lightweight threads that can be suspended and resumed, making them perfect for asynchronous programming without blocking the main thread.",
      "category": "Kotlin"
    },
    {
      "id": 7,
      "question": "What is the purpose of StateFlow in Kotlin?",
      "options": [
        "To manage UI state",
        "To handle database operations",
        "To make network calls",
        "To create animations"
      ],
      "correctAnswer": "To manage UI state",
      "explanation": "StateFlow is a state-holder observable flow that emits the current and new state updates to its collectors, commonly used for UI state management.",
      "category": "Kotlin"
    },
    {
      "id": 8,
      "question": "What is Material Design 3?",
      "options": [
        "A programming language",
        "A design system by Google",
        "A database system",
        "A testing framework"
      ],
      "correctAnswer": "A design system by Google",
      "explanation": "Material Design 3 is Google's latest design system that provides guidelines, components, and tools for creating modern and consistent user interfaces.",
      "category": "Android"
    },
    {
      "id": 9,
      "question": "What is the purpose of Dependency Injection?",
      "options": [
        "To manage memory",
        "To handle UI events",
        "To provide dependencies to classes",
        "To create layouts"
      ],
      "correctAnswer": "To provide dependencies to classes",
      "explanation": "Dependency Injection is a design pattern where dependencies are provided to a class instead of being created inside it, promoting loose coupling and easier testing.",
      "category": "Programming"
    },
    {
      "id": 10,
      "question": "What is the difference between val and var in Kotlin?",
      "options": [
        "No difference",
        "val is immutable, var is mutable",
        "val is slower, var is faster",
        "val is for numbers, var is for strings"
      ],
      "correctAnswer": "val is immutable, var is mutable",
      "explanation": "In Kotlin, val declares an immutable variable that can't be reassigned after initialization, while var declares a mutable variable that can be reassigned.",
      "category": "Kotlin"
    },
    {
      "id": 11,
      "question": "What is the difference between val and var in Kotlin?",
      "options": [
        "No difference",
        "val is immutable, var is mutable",
        "val is slower, var is faster",
        "val is for numbers, var is for strings"
      ],
      "correctAnswer": "val is immutable, var is mutable",
      "explanation": "In Kotlin, val declares an immutable variable that can't be reassigned after initialization, while var declares a mutable variable that can be reassigned.",
      "category": "Kotlin"
    },
    {
      "id": 12,
      "question": "What is the difference between val and var in Kotlin?",
      "options": [
        "No difference",
        "val is immutable, var is mutable",
        "val is slower, var is faster",
        "val is for numbers, var is for strings"
      ],
      "correctAnswer": "val is immutable, var is mutable",
      "explanation": "In Kotlin, val declares an immutable variable that can't be reassigned after initialization, while var declares a mutable variable that can be reassigned.",
      "category": "Kotlin"
    },
    {
      "id": 13,
      "question": "What is the difference between val and var in Kotlin?",
      "options": [
        "No difference",
        "val is immutable, var is mutable",
        "val is slower, var is faster",
        "val is for numbers, var is for strings"
      ],
      "correctAnswer": "val is immutable, var is mutable",
      "explanation": "In Kotlin, val declares an immutable variable that can't be reassigned after initialization, while var declares a mutable variable that can be reassigned.",
      "category": "Kotlin"
    }
  ]
}