Java Fundamentals and OOP Basics

What is the output of the following Java program?
public class HelloWorld {

public static void main(String[] args) {

System.out.println("Hello, World!");

}

}

• Hello World

• Hello, World!

• Error

• "Hello, World!"

Which component is responsible for converting bytecode into machine code at runtime?

• JDK

• JRE

• JVM

• Compiler

Which of the following is NOT a part of the JDK?

• Java Compiler

• Java Virtual Machine

• Java API

• Web Browser

What does JRE stand for?

• Java Runtime Environment

• Java Rapid Execution

• Java Read Environment

• Java Real Engine

Which of the following is a valid Java identifier?

• 123num

• total$Sum

• class

• a-b

Which of the following is the correct way to declare a variable in Java?

• int x = "10";

• float x = 10.5;

• String name = Java;

• char ch = 'A';

What is the purpose of comments in Java?

• To compile faster

• To describe the code for better readability

• To store code history

• To execute alternative logic

What symbol is used for single-line comments in Java?

• <!-- -->

• #

• //

• /* */

What is the output of this code?
public class Test {

public static void main(String[] args) {

System.out.println(args[0]);

}

}

Executed with: java Test Hello

• args

• null

• Hello

• Error

Which of the following is a logical operator in Java?

• ++

• &&

• ==

• %