Introduction to Java Programming

What is the correct syntax to print 'Hello, World!' in Java?

• Console.WriteLine('Hello, World!');

• print('Hello, World!');

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

• echo 'Hello, World!';

What data type would you use to store a whole number in Java?

• int

• boolean

• char

• float

How do you declare a variable in Java?

• var variableName = value;

• dataType: variableName;

• To declare a variable in Java, use the syntax: dataType variableName; or dataType variableName = value;

• variableName dataType;

Which of the following is a valid variable name in Java?

• my-variable

• 1stVariable

• myVariable1

• myVariable!

What data type is used to store a single character in Java?

• int

• char

• boolean

• string

What is the output of the following code: System.out.println(5 + 3);?

• 6

• 8

• 9

• 10

What is the range of the byte data type in Java?

• -128 to 127

• 0 to 255

• -128 to 0

• -256 to 255

How do you declare a float variable in Java?

• float myFloat = 5.5f;

• float myFloat = '5.5';

• float myFloat = 5.5;

• float myFloat = 5.5d;

What will happen if you try to assign a string to an int variable?

• A type error will occur.

• The int variable will automatically convert to a string.

• A warning will be displayed, but execution will continue.

• The program will run without any issues.

What is the purpose of comments in Java code?

• To execute the code faster

• The purpose of comments in Java code is to enhance code readability and maintainability.

• To store data temporarily

• To replace the need for documentation