AP CSA Unit One Review

Which of the following answer choices display the correct format for a Java main class?

• public static void main(String [] args)

• public void main static(String [] args)

• public static main static(String [] args);

• public static void main static(Int [] args)

• public static main static(String {} args);

Which of the following answer choices shows the output of the following snippet of code?

System.out.print(“Welcome back”);

System.out.println(“IA!”);

System.out.println(“Hope you had a great summer!”);

• Welcome back IA! Hope you had a great summer!

• Hope you had a great summer!

  Welcome back IA!

• Welcome back IA!

  Hope you had a great summer!

• Welcome backIA

  Hope you had a great summer!

• Welcome back IA!Hope you had a great summer!

Which of the following is NOT a Java Primitive Data Type

• String

• double

• integer

• char

• boolean

True or False: This code will run with no errors

public class QuizOne

{

            public static void main(String[]args)

            {

System.out.println(“Today is Monday”)

}

            }

• True

• False

Which of the following lines of code will print “Hello IA” to the console

• System.out.print(“Hello IA”)

• System.out.println(“Hello IA”);

• System.outprint(Hello IA);

• System.out.println(Hello IA)

Assuming this code has a main class and runs with no errors, what will be the output on the console:

        double z = 6.7;

        int x = 4;

        int y = 8;

        z = x/y;

        System.out.println(z);

• 0.5

• 0

• 0.0

• 2

• 2.0

What is the primary use of the Scanner class in Java?

• • To generate random numbers

• To create graphical user interfaces

• To read input of primitive data types and strings

• To manage database connections

• To handle file input/output

How do you correctly create a Scanner object in Java

• Scanner myObj = new Scanner()

• • Scanner myObj = new Scanner(java.util.Scanner)

• Scanner myObj = new Scanner(System.out)

• Scanner myObj = new Scanner(System.in)

• Scanner myObj = new Scanner(InputStream)

Which method is used to read a string value using the Scanner class?

• nextLine()

• nextInt()

• nextString()

• nextLn()

• nextStr()

What does the method nextLine() do in the Scanner class

• Reads a Boolean value

• • Reads a String value

• Reads an Int value

• Reads a Double value

• Reads a Float value