MCQ Questions on Java With Answers for BCA, MCA And Gate Exam

byPratap Solution Published:

1. Which of the following options leads to the portability and security of Java?

  • Bytecode is executed by JVM
  • The applet makes the Java code secure and portable
  • Use of exception handling
  • Dynamic binding between objects

2. Which of the following is not a Java feature?

  • Dynamic
  • Architecture Neutral
  • Use of pointers
  • Object-oriented

3. ____ is used to find and fix bugs in the Java programs.

  • JVM
  • JRE
  • JDK
  • JDB

4. The earlier name of Java was ___________________.

  • OAK
  • OOAK
  • JDK
  • None

5. ________________ is the first graphical browser.

  • IE
  • Mosaic
  • Chrome
  • None

6. What is the Java command to disassemble Java files and print the representation of Java bytecode?

  • javap
  • javac
  • javadoc
  • jar

7. _______________ is used to create and manage public keys, private keys, and security certificates.

  • ab tools
  • Key tools
  • both
  • none

8. On which platforms does Java run?

  • Windows
  • Unix
  • Mac
  • All

9. Which is not a Java Platform?

  • NetBeans
  • IntelliJ
  • Visual studio code
  • Eclipse

10. What is bytecode in Java?

  • Code generated by Java
  • Code generated by JVM
  • Name of Java source file
  • Block of code

11. The JAVA program converted into an intermediate language representation by a compiler is called __________________.

  • Byte code
  • machine code
  • binary code
  • Compile code

12. The concept of __________________ is possible in Java.

  • Write once
  • Write once and run anywhere
  • both
  • none

13. ___________________ is the extension for Java source code files.

  • .javadoc
  • .javac
  • .java
  • none

14. The code in the Java programming language is put inside ___________.

  • Blocks
  • Methods
  • Classes, Interfaces
  • All the above

15. In Java, the word ________ is used to create a new object.

  • java
  • new
  • class
  • function

16. In Java, an object is created at _________ time.

  • Assembling time
  • Run time
  • Compile-time
  • None of the above

17. A _________________ access specifier allows the method to be executed from another class.

  • Private
  • Public
  • Protected
  • None

18. Java program processing always starts with the main() method.

  • TRUE
  • FALSE
  • 0
  • 0

19. Java is a case-sensitive language.

  • FALSE
  • TRUE
  • 0
  • 0

20. _________________ command is used to compile the Java source code.

  • .Javac
  • .java
  • .javadoc
  • none

21. Which one of the following is an Equality operator in Java?

  • <=
  • =
  • !=
  • none

22. Which one of the following is a Unary operator in Java?

  • ()
  • ++
  • *
  • =

23. Which of the following operators has more precedence?

  • ()
  • =
  • ++
  • --

24. Which of the following is not an operator in Java?

  • !
  • ^
  • ~
  • <->

25. Which of the following operators has more precedence in Java?

  • *
  • +
  • -
  • none

26. The __________ selects among a set of statements depending on the value of a controlling expression.

  • If
  • for
  • while
  • none

27. An IF statement in Java is also a _______ statement.

  • Number
  • conditional
  • String
  • None of the above

28. Select the proper Java IF statement syntax from the list below.

  • if(condition) //statement
  • if(condition){ //statement}
  • if(condition){ //statement1 //statement2}
  • All of the above

29. In Java, the keyword used to declare a class is _________.

  • Function
  • Methods
  • Class
  • Java

30. A Java class can contain___________.

  • Variables
  • Methods, Constructors
  • Inner Classes (A class inside another class)
  • All of the above

31. Which of these methods of the String class is used to obtain a character at a specified index?

  • char()
  • Charat()
  • charat()
  • charAt()

32. A String in Java is a?

  • Class
  • Object
  • Variable
  • Character of array

33. Which of these methods of the String class can be used to test two strings for equality?

  • isequal()
  • isequals()
  • equal()
  • equals()

34. Which of the following statements is incorrect?

  • String is a class
  • Strings in Java are mutable
  • Every string is an object of class String
  • Java defines a peer class of String, called StringBuffer, which allows strings to be altered

35. _________ are a sequence of characters.

  • Character
  • Strings
  • Integers
  • Classes

36. The String class is?

  • Mutable
  • Immutable
  • a & b
  • none

37. How do you declare an array in Java?

  • int[] arr;
  • int arr[];
  • int arr;
  • Array<int> arr;

38. How do you access an element in an array in Java?

  • By using the element's value
  • By using the element's index
  • By using the element's key
  • By using the element's label

39. Which method is used to copy one array into another in Java?

  • copy()
  • clone()
  • System.arraycopy()
  • Arrays.copy()

40. What symbol is used for a variable method parameter?

  • ..
  • **
  • __
  • ...

41. What are the features of Object Oriented Programming (OOPs)?

  • Inheritance
  • Encapsulation
  • Polymorphism
  • All of the above

42. The class that is being inherited or subclassed is called ___.

  • Subclass
  • Superclass
  • 0
  • Superset

43. Java language supports ___ type of inheritance.

  • Multiple Inheritance
  • Multi-Level Inheritance
  • 0
  • 0

44. Which is the keyword used to implement inheritance in Java?

  • extends
  • implements
  • instanceof
  • None

45. Which of these keywords is used to define packages in Java?

  • pkg
  • Pkg
  • package
  • Package

46. Which access specifiers can be used for a class so that its members can be accessed by a different class in the same package?

  • Public
  • Private
  • Protected
  • All of the above

47. Packages that are inside another package are the _________.

  • packages
  • nested packages
  • util subpackages
  • subpackages

48. Which of these keywords is used to define interfaces in Java?

  • interface
  • Interface
  • into
  • Intf

49. Which of these keywords is used by a class to use an interface defined previously?

  • import
  • Import
  • implements
  • Implements

50. Which of these access specifiers can be used for an interface?

  • Public
  • Protected
  • private
  • All of the above

51. When does Exceptions in Java arise in the code sequence?

  • Run Time
  • Compilation Time
  • Can Occur Any Time
  • None of the mentioned

52. Which of these keywords is not a part of exception handling?

  • try
  • finally
  • thrown
  • catch

53. Which of these keywords is used to manually throw an exception?

  • try
  • finally
  • throw
  • catch

54. Which of these is a super class of all errors and exceptions in the Java language?

  • Catchable
  • Throwable
  • RunTimeExceptions
  • None of the above

55. In which of the following package does the Exception class exist?

  • java.file
  • java.lang
  • java.io
  • java.util

56. Which exception is thrown when a divide by zero statement executes?

  • NumberFormatException
  • NullPointerException
  • ArithmeticException
  • None of these

57. Which of these classes is related to all the exceptions that can be caught by using catch?

  • Error
  • Exception
  • RuntimeException
  • All of the mentioned

58. Which of these handles the exception when no catch is used?

  • Default handler
  • finally
  • throw handler
  • Java runtime system

59. Which of these keywords is used by the calling function to guard against the exception thrown by the called function?

  • try
  • throw
  • throws
  • catch

60. Which exceptions will occur if we try to access the index of an array beyond its length?

  • ArithmeticException
  • ArrayException
  • ArrayIndexException
  • ArrayIndexOutOfBoundsException

61. Which of these streams contains the classes which can work on character streams?

  • InputStream
  • OutputStream
  • Character Stream
  • All of the mentioned

62. Which of these classes is used to read characters in a file?

  • FileReader
  • FileWriter
  • FileInputStream
  • InputStreamReader

63. Which of these methods of the FileReader class is used to read characters from a file?

  • read()
  • scanf()
  • get()
  • getInteger()

64. Which of these classes can be used to implement the input stream that uses a character array as the source?

  • BufferedReader
  • FileReader
  • CharArrayReader
  • FileArrayReader

65. Which of these classes can return more than one character to be returned to the input stream?

  • BufferedReader
  • BufferedWriter
  • PushbackReader
  • CharArrayReader

66. How many methods are there in a functional interface in Java 8?

  • 0
  • 1
  • 2
  • 3

67. What is the Stream API in Java 8?

  • A new file I/O stream library
  • A new concurrency library
  • A new API for working with collections
  • A new API for working with databases

68. A Lambda expression returns

  • Object
  • Nothing
  • Function
  • Reference

69. What is not true about functional interfaces in Java?

  • They contain only one abstract method.
  • They exhibit only one functionality.
  • Runnable and Callable are not examples of functional interfaces.
  • None

70. Which of these does the Stream map() operate on?

  • Class
  • Interface
  • Predicate
  • Function
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