Java MCQs Based online Test-1

This online test section contains the next top best multiple-choice type questions with answers (MCQs) based on Java.This online Quiz / Practice Test is suitable for various exams conducted by various educational organizations.These Objective questions cover various aspects of Java programming, from basic concepts to object-oriented programming and exception handling.

Test Instructions
Question type	Questions remain the same unless test is updated
Total Number of Questions	25
Time Limit	20 Minutes
Points	1 Point for each Question

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Question 1 of 25

Q-1. Which statements are true regarding ServletContext Init Parameters in the deployment descriptor?

They are set at deployment-time, but accessed at run-time.

They are accessible from any session within that context.

They are not set at deployment-time, but accessed at run-time.

They are set at deployment-time and can be updated at run-time

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Question 2 of 25

Q-2. Which of the following symbols are metacharacters supported by the java.util.regex API?

Your Answer : Correct

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Question 3 of 25

Q-3. SQLException has a feature of chaining – identify the right code to execute the same from the following

catch(SQLException e) { out.println(e.getMessage()); while((e=e.getNextException())!=null) { out.println(e.getMessage()); } }

catch(SQLException e) { out.println(e.getNextException()); while((e=e.getMessage())!=null) { out.println(e.getMessage()); } }

catch(SQLException e) { out.println(e.getMessage()); while((e=e.getEncapsulatedException())!=null) { out.println(e.getMessage()); } }

catch(ClassNotFoundException e) { out.println(e.getMessage()); while((e=e.getNextException())!=null) { out.println(e.getMessage()); } }

catch(ClassNotFoundException e){ { out.println(e.getMessage()); } }

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Question 4 of 25

Q-4. What is the result of an attempt to compile and run the given program?

public class Test107 {
public static void main(String[] args) {
System.out.println(test());
}
private static int test() {
return (true ? null : 0);
}
}

It gets a compiler error, because of an attempt to return null from the method with return type “int”.

It compiles, but throws NullPointerException at run-time.

It compiles, runs, and prints “null” (without quotes).

It compiles, runs, and prints “0” (without quotes).

Your Answer : Correct

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Question 5 of 25

Q-5. Which of the following methods are members of the Vector class and allow you to input a new element?

addItem

append

insert

addElement

Your Answer : Correct

Your Answer : Incorrect

Question 6 of 25

Q-6. What does "JVM" stand for in the context of Java programming?

Java Virtual Machine

Java Visual Machine

Java Virtual Memory

Java Visual Memory

Your Answer : Correct

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Question 7 of 25

Q-7. Which of the following statements is true about Java?

Java is a purely procedural programming language.

Java is a compiled language.

Java applications are platform-dependent.

Java code is executed by a browser.

Your Answer : Correct

Your Answer : Incorrect

Question 8 of 25

Q-8. What is the main purpose of the "main" method in a Java program?

It is the entry point of the program.

It is used for printing messages to the console.

It defines the data types used in the program.

It handles exceptions in the program.

Your Answer : Correct

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Question 9 of 25

Q-9. Which of the following data types is NOT a primitive data type in Java?

int

float

String

boolean

Your Answer : Correct

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Question 10 of 25

Q-10. In Java, what does the "extends" keyword represent in the context of inheritance?

It indicates an interface implementation.

It signifies method overriding.

It denotes class inheritance.

It represents method overloading.

Your Answer : Correct

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Question 11 of 25

Q-11. Which access modifier makes a class or method accessible only within its own package?

private

protected

default

public

Your Answer : Correct

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Question 12 of 25

Q-12. What does the "super" keyword refer to in Java?

The superclass of a class

A method to call a constructor

A method to access static variables

A keyword for exception handling

Your Answer : Correct

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Question 13 of 25

Q-13. Which Java keyword is used to explicitly allocate memory for an object?

allocate

create

new

instance

Your Answer : Correct

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Question 14 of 25

Q-14. What is the purpose of the "finally" block in Java's try-catch-finally exception handling?

It specifies the catch block to execute.

It always executes, regardless of whether an exception is thrown.

It terminates the program if an exception occurs.

It is used for defining custom exceptions.

Your Answer : Correct

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Question 15 of 25

Q-15. Which Java operator is used for performing type casting?

(type)

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Question 16 of 25

Q-16. In Java, what is the purpose of the "break" statement?

To terminate a loop prematurely

To resume execution after an exception

To jump to a specific line of code

To skip the current iteration of a loop

Your Answer : Correct

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Question 17 of 25

Q-17. Which Java collection interface represents an ordered collection that does not allow duplicate elements?

List

Set

Map

Collection

Your Answer : Correct

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Question 18 of 25

Q-18. What is the Java API (Application Programming Interface)?

A set of predefined Java classes and interfaces

A platform-independent compiler

A version control system

A database management system

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Question 19 of 25

Q-19. Which Java package is used for input and output operations?

java.util

java.net

java.io

java.lang

Your Answer : Correct

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Question 20 of 25

Q-20. What is the purpose of the "static" keyword in Java?

It indicates that a method can be overridden.

It specifies that a method can be called without creating an instance of the class.

It denotes that a class is abstract.

It represents a data type.

Your Answer : Correct

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Question 21 of 25

Q-21. Which of the following is a valid method signature in Java?

void myMethod()

myMethod(void)

int myMethod(int x, int y)

void myMethod(int x, int y)

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Question 22 of 25

Q-22. What is the default value of a boolean variable in Java?

true

false

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Question 23 of 25

Q-23. Which Java keyword is used for implementing multiple inheritance in the form of interfaces?

implements

extends

inherits

super

Your Answer : Correct

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Question 24 of 25

Q-24. What is the purpose of the "package" statement in Java?

It defines the main method.

It specifies the superclass.

It defines the class constructor.

It organizes classes into a package.

Your Answer : Correct

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Question 25 of 25

Q-25. What does the "this" keyword represent in Java?

The current class instance

The superclass

The current method

The parent class

Your Answer : Correct

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Java MCQs Based Online Test 1

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