T_(b)(C)_4.1 Introduction to Java Program

What is the purpose of comments in a Java program?

• To execute code

• To provide information about the program

• To define classes

• To store data

What must every Java program contain?

• A comment section

• A user-defined data type

• A main method

• An input statement

What does the main() method represent in a Java program?

• A comment section

• A user-defined class

• An output statement

• The entry point of the program

Which of the following is a valid output statement in Java?

• System.out.write();

• System.out.print();

• System.out.display();

• System.out.show();

What is the purpose of the Scanner class in Java?

• To accept user input

• To display output

• To create new classes

• To define data types

Which escape sequence represents a new line in Java?

• \b

• \t

• \r

• \n

What type of data does the nextInt() method of the Scanner class read?

• Boolean

• String

• Double

• Integer

What is the correct way to declare a class in Java?

• define ClassName {}

• Class ClassName {}

• class ClassName {}

• create ClassName {}

Which of the following is NOT a valid data type in Java?

• boolean

• int

• float

• string

What does the body of the main method enclose?

• Parentheses

• Square brackets

• Angle brackets

• Curly braces