file.json

[
  {
    "question": "What is the purpose of the Stream API introduced in Java 8?",
    "options": {
      "a": "To provide a way to perform multi-threaded computations.",
      "b": "To enable functional-style operations on sequences of elements.",
      "c": "To create and manage threads in a more efficient way.",
      "d": "To enable non-blocking I/O operations."
    },
    "answer": "b"
  },
  {
    "question": "What are lambda expressions in Java 8?",
    "options": {
      "a": "A way to define multiple constructors for a class.",
      "b": "A concise representation of an anonymous function that can be passed around and executed.",
      "c": "A way to create instances of functional interfaces.",
      "d": "A type of interface that has only one abstract method."
    },
    "answer": "b"
  },
  {
    "question": "In Java 8, what interface should a functional interface extend to indicate that it is a functional interface?",
    "options": {
      "a": "Runnable",
      "b": "Callable",
      "c": "Functional",
      "d": "FunctionalInterface"
    },
    "answer": "d"
  },
  {
    "question": "Which of the following functional interfaces represents a function that takes two arguments and returns a result?",
    "options": {
      "a": "Supplier",
      "b": "Consumer",
      "c": "Predicate",
      "d": "BiFunction"
    },
    "answer": "d"
  },
  {
    "question": "What is the purpose of the Collector interface in Java 8's Stream API?",
    "options": {
      "a": "To filter elements in a stream.",
      "b": "To map elements to another type.",
      "c": "To reduce the elements of a stream to a single value.",
      "d": "To perform mutable reduction operations on a stream."
    },
    "answer": "d"
  },
  {
    "question": "What does the Optional class in Java 8 represent?",
    "options": {
      "a": "A wrapper for a nullable value.",
      "b": "An alternative to the null value.",
      "c": "A way to handle exceptions in functional programming.",
      "d": "A utility class for mathematical operations."
    },
    "answer": "a"
  },
  {
    "question": "In Java 8, what is the difference between parallel and sequential streams?",
    "options": {
      "a": "Parallel streams are executed on multiple threads, while sequential streams are executed on a single thread.",
      "b": "Parallel streams are more efficient for small datasets, while sequential streams are better for large datasets.",
      "c": "Sequential streams are executed on multiple threads, while parallel streams are executed on a single thread.",
      "d": "There is no difference; they are two different names for the same concept."
    },
    "answer": "a"
  },
  {
    "question": "What is a method reference in Java 8?",
    "options": {
      "a": "A reference to a private method in a class.",
      "b": "A reference to an instance of a functional interface.",
      "c": "A shorthand notation for writing lambda expressions for certain cases.",
      "d": "A reference to a method that takes no arguments and returns void."
    },
    "answer": "c"
  },
  {
    "question": "What is the purpose of the java.util.function package in Java 8?",
    "options": {
      "a": "To provide utility methods for handling collections.",
      "b": "To enable functional programming by defining functional interfaces.",
      "c": "To implement the Observer pattern.",
      "d": "To handle I/O operations in a functional way."
    },
    "answer": "b"
  },
  {
    "question": "What is the main benefit of using the CompletableFuture class in Java 8 for asynchronous programming?",
    "options": {
      "a": "It allows you to create and manage threads directly.",
      "b": "It enables you to define complex synchronous operations.",
      "c": "It provides a clean and easy-to-use API for managing asynchronous computations.",
      "d": "It allows you to perform parallel processing without using streams."
    },
    "answer": "c"
  }
]