Java Quiz

By Shubhranshu Shekhar / October 6, 2024

0 votes, 0 avg

418

Java Questions

1 / 15

1. Which of the following are not java modifiers?

A. public

B. private

C. friendly

D. transient

2 / 15

2. Which of the following is true in regard to applet execution?

A. Applets loaded and executing locally have some restrictions faced by applets that get loaded from the network.

B. Applets loaded and executing locally have none of the restrictions faced by applets that get loaded from the network.

C. Applets loaded from the same computer where they are executing have the same restrictions as applets loaded from the network.

D. Applets cant react to user input and change dynamically

3 / 15

3. The following Syntax is used for?

class Subclass-name extends Superclass-name   {                     //methods and fields }

A. Polymorphism

B. Encapsulation

C. Inheritance

D. none of the above

4 / 15

4. Which of these method of class String is used to remove leading and trailing whitespaces?

A. startsWith()

B. trim()

C. Trim()

D. doTrim()

5 / 15

5. What is the syntax for java main method?

A. public void main(String[] args)

B. public static void main(String[] args)

C. public static void main()

D. none of the above

6 / 15

6. Which of the following is true about public access modifier?

A. Variables, methods and constructors which are declared public can be accessed by any class

B. Variables, methods and constructors which are declared public can be accessed by any class lying in same pacckage.

C. Variables, methods and constructors which are declared public in the superclass can be accessed only by it’s child class.

D. none of the above

7 / 15

7. What is the process of defining two or more methods within same class that have same name but different parameters declaration?

A. method overloading

B. method overriding

C. method hiding

D. none of the mentioned

8 / 15

8. Which of these data types is used to store command line arguments?

A. Array

B. Stack

C. String

D. Integer

9 / 15

9. Identify the modifier which cannot be used for constructor.

A. public

B. protected

C. private

D. static

10 / 15

10. Identify the output of the following program.

String str = “Hellow”;
System.out.println(str.indexOf(‘t));

A. 1

B. null

C. -1

D. o

11 / 15

11. Which of these is not a correct statement?

A. Every class containing abstract method must be declared abstract

B. Abstract class defines only the structure of the class not its implementation

C. Abstract class can be initiated by new operator

D. Abstract class can be inherited

12 / 15

12. Which data type value is returned by all transcendental math functions?

A. int

B. float

C. double

D. long

13 / 15

13. Which of the following is a type of polymorphism in Java?

A. Compile time polymorphism

B. Execution time polymorphism

C. Multiple polymorphism

D. Multilevel polymorphism

14 / 15

14. Find the output of the following program.

public class Solution{
       public static void main(String[] args){
                     short x = 10;
                     x =  x * 5;
                     System.out.print(x);
       }
}

A. 50

B. 10

C. Compilation error

D. Exception

15 / 15

15. Which of these keywords are used for the block to be examined for exceptions?

A. check

B. throw

C. catch

D. try

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Written by Shubhranshu Shekhar, who has trained 20000+ students in coding.

Shubhranshu Shekhar

Shubhranshu Shekhar is a coding instructor, mentor, and founder of VSIT Delhi with 20+ years of teaching experience (since 2004). He has guided many students who are now working in multinational companies and specializes in Full Stack Development, Python, Digital Marketing, and Data Analytics.

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