Miscellaneous In Java MCQ

Test your knowledge with important Miscellaneous In Java MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30 + more Miscellaneous In Java MCQs at Bissoy

• Which annotation is used to represent command line input and assigned to correct data type?
  ক

  @Input

  খ

  @Variable

  গ

  @Command Line

  ঘ

  @Parameter
• In Java, what does the `this` keyword refer to?
  ক

  It defines JavaBean properties

  খ

  It executes SQL queries

  গ

  It creates JavaBeans

  ঘ

  It refers to the current instance of the class
• What is the purpose of the `synchronized` keyword in Java?
  ক

  To create JavaBeans

  খ

  To execute SQL queries

  গ

  To create a synchronized block of code for multithreading

  ঘ

  To define JavaBean properties
• Which Java class is used to represent an ordered collection of elements?
  ক

  Map

  খ

  List

  গ

  Queue

  ঘ

  Map
• In Java, which exception is thrown when an object is accessed before it has been initialized?
  ক

  InitializationException

  খ

  ObjectNotInitializedException

  গ

  NullPointerException

  ঘ

  NullReferenceException
• What is the purpose of the `instanceof` operator in Java?
  ক

  To create JavaBeans

  খ

  To execute SQL queries

  গ

  To define JavaBean properties

  ঘ

  To check if an object is an instance of a particular class or interface
• Which Java operator is used to perform a bitwise XOR operation between two integers?
  ক

  ^

  খ

  &&

  গ

  ||

  ঘ

  &
• What is the output of the following code snippet in Java? `System.out.println(Math.pow(2, 3));`
  ক

  6

  খ

  2

  গ

  Compilation Error

  ঘ

  8
• In Java, what is the purpose of the `transient` keyword when applied to an instance variable?
  ক

  To create JavaBeans

  খ

  To execute SQL queries

  গ

  It indicates that the variable should not be serialized

  ঘ

  To define JavaBean properties
• What does the `super` keyword refer to in Java?
  ক

  It executes SQL queries

  খ

  It refers to the superclass of the current class

  গ

  It creates JavaBeans

  ঘ

  It executes SQL queries
• Which Java keyword is used to define a subclass that inherits from another class?
  ক

  implements

  খ

  inherits

  গ

  extends

  ঘ

  subclass
• In Java, which exception is thrown when an attempt is made to access an array element with an index that is negative or greater than or equal to the array size?
  ক

  OutOfBoundsException

  খ

  ArrayOutOfBoundsError

  গ

  IndexOutOfBoundsException

  ঘ

  ArrayIndexOutOfBoundsException
• What is the result of the following code in Java? `System.out.println(10 > 5 ? "true" : "false");`
  ক

  true

  খ

  false

  গ

  Compilation Error

  ঘ

  Runtime Error
• In Java, which collection class does not allow duplicate elements and is typically implemented as a binary tree?
  ক

  HashSet

  খ

  ArrayList

  গ

  LinkedList

  ঘ

  TreeSet
• What is the purpose of the `@SuppressWarnings` annotation in Java?
  ক

  To create JavaBeans

  খ

  To execute SQL queries

  গ

  To suppress compiler warnings for specific code

  ঘ

  To define JavaBean properties
• Which Java keyword is used to define a constant interface?
  ক

  const

  খ

  final

  গ

  constant

  ঘ

  const
• What is the purpose of the `String.format()` method in Java?
  ক

  To define JavaBean properties

  খ

  To execute SQL queries

  গ

  To format strings based on a format string and arguments

  ঘ

  To create JavaBeans
• Which Java keyword is used to explicitly specify that a variable cannot be changed after it is assigned a value?
  ক

  immutable

  খ

  static

  গ

  const

  ঘ

  final
• What does the `break` statement do when used in a `switch` statement in Java?
  ক

  It exits the `switch` statement and continues with the next statement after it

  খ

  It ends the program execution

  গ

  It restarts the `switch` statement from the beginning

  ঘ

  It skips the current case and continues with the next case
• What is the result of the following code in Java? `System.out.println(5 / 0);`
  ক

  Compilation Error

  খ

  Infinity

  গ

  It throws an ArithmeticException

  ঘ

  0
• Which Java keyword is used to declare a class method that can be called without creating an instance of the class?
  ক

  this

  খ

  static

  গ

  super

  ঘ

  this
• What is the primary purpose of the `finally` block in a Java exception handling structure?
  ক

  To define JavaBean properties

  খ

  To execute SQL queries

  গ

  To ensure that certain code is always executed, regardless of whether an exception is thrown or not

  ঘ

  To create JavaBeans
• In Java, which data type represents a sequence of characters and is enclosed in double quotes?
  ক

  double

  খ

  int

  গ

  char

  ঘ

  String
• Which Java exception is thrown when an array index is out of bounds?
  ক

  ArrayIndexOutOfBoundsException

  খ

  IndexOutOfBoundsException

  গ

  ArrayOutOfBoundsError

  ঘ

  OutOfBoundsException
• What is the output of the following code snippet in Java? `System.out.println("Java".substring(0, 2));`
  ক

  J

  খ

  ava

  গ

  Compilation Error

  ঘ

  Ja
• In Java, what does the `System.exit(0);` statement do?
  ক

  It creates JavaBeans

  খ

  It executes SQL queries

  গ

  It terminates the Java Virtual Machine (JVM)

  ঘ

  It defines JavaBean properties
• Which Java operator is used for short-circuit logical OR?
  ক

  &

  খ

  ||

  গ

  &&

  ঘ

  &
• What is the purpose of the `try-with-resources` statement in Java?
  ক

  To define JavaBean properties

  খ

  To execute SQL queries

  গ

  To automatically close resources like streams, files, or sockets

  ঘ

  To create JavaBeans
• In Java, what is the purpose of the `NullPointerException`?
  ক

  To create JavaBeans

  খ

  To execute SQL queries

  গ

  To define JavaBean properties

  ঘ

  It is thrown when an attempt is made to access an object that is null
• Which Java keyword is used to create a new instance of a class?
  ক

  new

  খ

  create

  গ

  instance

  ঘ

  class