java-mcq-set-4 – ExamSprint

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Test your understanding of Java basics with this MCQ practice set 4

1.

Which class is automatically imported?

java.util

java.net

java.io

java.lang

None

2.

Which keyword is used to import package?

using

include

package

import

None

3.

Method overriding occurs in:

Package

Different class (inheritance)

Interface

Same class

None

4.

Which file extension contains bytecode?

.java

.jar

.class

.exe

None

5.

Which concept allows code reuse?

Inheritance

Encapsulation

Abstraction

Polymorphism

None

6.

Which is compile-time polymorphism?

Overloading

Abstraction

Inheritance

Overriding

None

7.

What happens if main() method is not static?

Program runs

Runtime error

Compile error

Infinite loop

None

8.

Which keyword throws exception manually?

try

throw

throws

catch

None

9.

Which type is used for Unicode?

byte

char

int

String

None

10.

What is the size of boolean in Java?

Depends on JVM

1 byte

Not defined

1 bit

None

11.

Which is runtime polymorphism?

Overriding

Constructor

Static binding

Overloading

None

12.

Which component converts Java source code into bytecode?

JVM

Compiler(javac)

JRE

JDK

None

13.

what is the output?

try{
int x=10/0;
}catch(Exception e){
System.out.print("X");
}

0

Error

X

Crash

None

14.

What is the output?

int x = 10;
double y = x;
System.out.println(y);

Error

10.0

10

null

None

15.

What is the output?

int x = (int)5.99;
System.out.println(x);

5

6

Error

5.99

None

16.

What is the range of byte?

-127 to 128

-128 to 127

0 to 255

-256 to 255

None

17.

Which of the following is NOT part of JRE?

Runtime environment

JVM

Class Libraries

Compiler

None

18.

What is the Output?

System.out.println(5 + 2.0);

Error

5.2

7

7.0

None

19.

Which is not primitive?

boolean

char

String

int

None

20.

Which method takes input from user?

input( )

show( )

print( )

nextInt( )

None

Time's up

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