Java Programming Quiz - unit 1b

Where should the import java.util.Scanner; statement be placed in a Java program?

• Inside the main method

• At the beginning of the program before the class declaration

• At the end of the program

• Anywhere in the program

What will the following code output? String text = "Hello, Java!"; int index = text.indexOf("Java"); System.out.println(index);

• 7

• 6

• 5

• 8

What is the value of y after the following statements? int y = 4; y *= 2;

• 2

• 4

• 6

• 8

What does \t represent in a string?

• A tab space

• A new line

• A backspace

• A space

What will System.out.println("Java".charAt(2)); output?

• J

• a

• v

• Throws an error

What will the following code output? String text = "Hello, World!"; char ch = text.substring(7, 12).charAt(2); System.out.println(ch);

• W

• r

• l

• o

What method is used to read a double value using a Scanner object?

• nextDouble()

• getDouble()

• readDouble()

• inputDouble()

What will the following code output? String a = "Hello"; String b = "World"; System.out.println(a + " " + b);

• Hello World

• HelloWorld

• Hello

• Throws an error

Which of the following declares a character variable correctly?

• char ch = 'A';

• char ch = "A";

• char ch = A;

• char ch <- 'A';

What will System.out.println("Java".length()); output?

• 3

• 4

• 5

• Throws an error