JAVA Basics MCQs

What will be printed?

1 System.out.println(2 + 3 * 4);

a) 20

b) 14

c) 24

d) 12

View Answer

Correct answer: B — 14
Which of the following is not a primitive type in Java?

a) int

b) float

c) String

d) boolean

View Answer

Correct answer: C — String
What will be printed?

1 System.out.println("Hello" + "World");

a) Hello World

b) HelloWorld

c) Compilation error

d) Runtime exception

View Answer

Correct answer: B — HelloWorld
Which keyword is used to define a constant in Java?

a) const

b) final

c) static

d) constant

View Answer

Correct answer: B — final
What will be printed?

1 int x = 5;

2 System.out.println(x++);

a) 5

b) 6

c) Compilation error

d) Runtime exception

View Answer

Correct answer: A — 5
Which of the following is the default value of a boolean in Java?

a) true

b) false

c) null

d) 0

View Answer

Correct answer: B — false

What will be printed?

1	int a = 10;
2	int b = 20;
3	System.out.println(a > b);

a) true

b) false

c) Compilation error

d) Runtime exception

View Answer

Correct answer: B — false

Which of the following is used to terminate a statement in Java?

a) :

b) ;

c) ,

d) .

View Answer

Correct answer: B — ;
What will be printed?

1 System.out.println(10/3);

a) 3

b) 3.33

c) 3.0

d) Compilation error

View Answer

Correct answer: A — 3
Which of the following is the entry point of a Java program?

a) public void start()

b) public static void main(String[] args)

c) public void run()

d) public static void init()

View Answer

Correct answer: B — public static void main(String[] args)
What will be printed?

1 System.out.println(5 == 5);

a) true

b) false

c) Compilation error

d) Runtime exception

View Answer

Correct answer: A — true
Which of the following is used to allocate memory dynamically in Java?

a) malloc

b) new

c) alloc

d) create

View Answer

Correct answer: B — new
What will be printed?

1 System.out.println("Java".length());

a) 3

b) 4

c) 5

d) Compilation error

View Answer

Correct answer: B — 4
Which of the following is not a valid access modifier in Java?

a) public

b) private

c) protected

d) internal

View Answer

Correct answer: D — internal
What will be printed?

1 System.out.println(10 % 3);

a) 1

b) 2

c) 3

d) 0

View Answer

Correct answer: A — 1
Which of the following is used to compare two strings in Java?

a) ==

b) equals()

c) compare()

d) compareTo()

View Answer

Correct answer: B — equals()
What will be printed?

1 System.out.println("A" + 1);

a) A1

b) 65

c) Compilation error

d) Runtime exception

View Answer

Correct answer: A — A1
Which of the following is the default value of an int in Java?

a) 0

b) 1

c) null

d) undefined

View Answer

Correct answer: A — 0
What will be printed?

1 System.out.println(true && false);

a) true

b) false

c) Compilation error

d) Runtime exception

View Answer

Correct answer: B — false
Which of the following is used to handle exceptions in Java?

a) try-catch

b) if-else

c) switch

d) loop

View Answer

Correct answer: A — try-catch
What will be printed?

1 System.out.println(2 << 2);

a) 4

b) 8

c) 2

d) 16

View Answer

Correct answer: B — 8
Which of the following is used to stop a loop in Java?

a) break

b) continue

c) exit

d) stop

View Answer

Correct answer: A — break
What will be printed?

1 System.out.println("abc".toUpperCase());

a) abc

b) ABC

c) Compilation error

d) Runtime exception

View Answer

Correct answer: B — ABC
Which of the following is used to define a package in Java?

a) package

b) import

c) namespace

d) module

View Answer

Correct answer: A — package
What will be printed?

1 System.out.println(5/2.0);

a) 2

b) 2.5

c) 2.0

d) Compilation error

View Answer

Correct answer: B — 2.5
Which of the following is used to create a thread in Java?

a) Thread class

b) Runnable interface

c) Both A and B

d) None

View Answer

Correct answer: C — Both A and B
What will be printed?

1 System.out.println("Java".charAt(2));

a) J

b) a

c) v

d) Compilation error

View Answer

Correct answer: C — v
Which of the following is used to import classes in Java?

a) package

b) import

c) include

d) namespace

View Answer

Correct answer: B — import
What will be printed?

1 System.out.println(10 == 10.0);

a) true

b) false

c) Compilation error

d) Runtime exception

View Answer

Correct answer: A — true
Which of the following is used to define an interface in Java?

a) interface

b) abstract

c) class

d) implements

View Answer

Correct answer: A — interface
What will be printed?

1 System.out.println("Hello".concat("World"));

a) Hello World

b) HelloWorld

c) Compilation error

d) Runtime exception

View Answer

Correct answer: B — HelloWorld
Which of the following is used to exit from a program in Java?

a) break

b) System.exit()

c) stop

d) return

View Answer

Correct answer: B — System.exit()
What will be printed?

1 System.out.println(3 > 2 ? "Yes" : "No");

a) Yes

b) No

c) Compilation error

d) Runtime exception

View Answer

Correct answer: A — Yes
Which of the following is used to define a class in Java?

a) class

b) object

c) new

d) define

View Answer

Correct answer: A — class
What will be printed?

1 System.out.println("Java".equals("JAVA"));

a) true

b) false

c) Compilation error

d) Runtime exception

View Answer

Correct answer: B — false
Which of the following is used to define a constructor in Java?

a) Same name as class

b) init()

c) new()

d) constructor()

View Answer

Correct answer: A — Same name as class
What will be printed?

1 System.out.println("abc".replace("a","z"));

a) zbc

b) abc

c) Compilation error

d) Runtime exception

View Answer

Correct answer: A — zbc
Which of the following is used to define a constant reference in Java?

a) final

b) const

c) static

d) constant

View Answer

Correct answer: A — final
What will be printed?

1 System.out.println(7/2);

a) 3

b) 3.5

c) 4

d) Compilation error

View Answer

Correct answer: A — 3
Which of the following is used to create an object in Java?

a) new

b) malloc

c) alloc

d) create

View Answer

Correct answer: A — new
What will be printed?

1 System.out.println("Java".toLowerCase());

a) java

b) JAVA

c) Java

d) Compilation error

View Answer

Correct answer: A — java
Which of the following is used to define inheritance in Java?

a) extends

b) implements

c) inherits

d) super

View Answer

Correct answer: A — extends
What will be printed?

1 System.out.println(2 == 2.0);

a) true

b) false

c) Compilation error

d) Runtime exception

View Answer

Correct answer: A — true
Which of the following is used to define polymorphism in Java?

a) Overloading and Overriding

b) Inheritance only

c) Encapsulation only

d) Abstraction only

View Answer

Correct answer: A — Overloading and Overriding
What will be printed?

1 System.out.println("Hello".indexOf("l"));

a) 1

b) 2

c) 3

d) Compilation error

View Answer

Correct answer: B — 2
Which of the following is used to define abstraction in Java?

a) abstract class

b) interface

c) Both A and B

d) None

View Answer

Correct answer: C — Both A and B
What will be printed?

1 System.out.println("Java".substring(1,3));

a) Ja

b) av

c) va

d) Compilation error

View Answer

Correct answer: B — av
Which of the following is used to define encapsulation in Java?

a) private variables with public getters/setters

b) inheritance

c) polymorphism

d) abstraction

View Answer

Correct answer: A — private variables with public getters/setters
What will be printed?

1 System.out.println("abc".equalsIgnoreCase("ABC"));

a) true

b) false

c) Compilation error

d) Runtime exception

View Answer

Correct answer: A — true
Which of the following is used to define multiple inheritance in Java?

a) class inheritance

b) interface implementation

c) abstract class

d) super keyword

View Answer

Correct answer: B — interface implementation

1	int x = 5;
2	System.out.println(x++);

Quick Links to Explore