Java Fundamentals

A ________ in Java is a container that holds a value.

which of the following is a primitive data type in Java.

• char

• double

• integer

• string

Explain the difference between '==' and 'equals()' in Java.

• '==' compares content, 'equals()' compares reference.

• '==' compares reference, 'equals()' compares reference.

• '==' compares reference, 'equals()' compares content.

• '==' compares content, 'equals()' compares reference and content.

How do you declare an array in Java?

• int[] numbers;

• numbers[] = new int[];

• array numbers;

• int numbers[];

_______________ in Java is having multiple methods in the same class with the same name but different parameters.

How to define a class in Java.

• void ClassName { // class body }

• ClassName { // class body }

• public class ClassName { // class body }

• class ClassName { // class body }

How do you create a package in Java?

• Create a new folder with the package name and place the Java file inside

• Use a single class file for all your code

• Define a package statement at the beginning of your Java file with the desired package name.

• Add a 'package' keyword at the end of your Java file

String data type is _______ and _________.

• primitive and mutable.

• non-primitive and mutable.

• primitive and immutable.

• non-primitive and immutable.

What is the output of the following code

int Integer = 24;

char String = ‘Hello’;

System.out.print(Integer);

System.out.print(String);

What is the 'this' keyword used for in Java?

• Indicates the end of a class method

• Refers to the previous instance of the class

• Used to declare a new class instance

• Refers to the current instance of the class