Basic Operators and Operator Precedence

What is the purpose of the Scanner class in Java?

• To create graphical user interfaces

• To read data from the standard input device

• To manage memory allocation

• To write data to files

Which statement is used to import the Scanner class?

• import Scanner;

• import java.Scanner;

• import java.util.*;

• import java.util.Scanner;

What does the following statement do? Scanner input = new Scanner(System.in);

• Declares a variable of type Scanner

• Creates a new input stream

• Creates a Scanner object associated with the keyboard

• Imports the Scanner class

Which method retrieves input as a double?

• nextFloat()

• nextInt()

• nextDouble()

• nextLine()

What does the next() method return?

• The next complete token as a String

• The next line of data

• A double value

• A short value

How do you retrieve a single character from the keyboard?

• Use nextLine()

• Use next().charAt(1)

• Use nextChar()

• Use next() and charAt(0)

What does the print() method do?

• Formats output

• Reads input from the user

• Displays output and moves to a new line

• Displays output without moving to a new line

Which method is used to display output and move to the next line?

• println()

• printf()

• output()

• print()

How do you concatenate strings in Java?

• Using the + sign

• Using the join() method

• Using the append() method

• Using the concat() method

What does the printf() method do?

• Reads formatted input

• Displays output without formatting

• Formats output according to specified instructions

• Concatenates strings