Quiz 3

TJ04_01. What is the output of the following program? Be precise about where there are spaces and where there are newlines.

public class Ex4_1{

public static void zoop() {

baffle();

System.out.print("you foo ");

baffle(); }

public static void main(String[] args) {

System.out.print("No, I ");

zoop();

System.out.print("I ");

baffle(); }

public static void baffle() {

System.out.print("baz");

ping(); }

public static void ping() {

System.out.println("."); } }

• the program doesn't stop

• No, I baz.
  you foo baz.
  I baz.

• none of the other choices is correct

• you foo baz.
  No, I baz.
  I baz.

• you foo baz.
  No, I baz.
  I baz.

TJ04_02. What is the output of the following program?

public class Ex4_2{

public static void zoop() {

baffle();

System.out.print("you foo ");

baffle(); }

public static void main(String[] args) {

System.out.print("No, I ");

zoop();

System.out.print("I ");

baffle(); }

public static void baffle() {

System.out.print("baz");

ping(); }

public static void ping() {

System.out.println(".");

baffle(); } }

• you foo baz.
  No, I baz.
  I baz.

• none of the other choices is correct

• the program doesn't stop

• No, I baz.
  you foo baz.
  I baz.

• you foo baz.
  No, I baz.
  I baz.

TJ04_03. Choose what would be the correct first line of a method named zool that takes three parameters: an int and two Strings.

• none of the other choices is correct

•  

      public void zool(int i, String s1, String s2)

•  

      public void zool(int i, String s1, s2)

•  

      public  zool(int i , String ss, String ss)

•  

      public void zool(int, Str, Str)

TJ04_04. Identify the line of code that calls a method named zool, that takes three parameters: an int and two Strings, passing as arguments the value 11, the String "hello" and the String "world".

•  

      public void zool(11,"hello","world")

•  

  zool(11, hello, world)

•  

   zool(int, Str, Str)

•  

  none of the other choices is correct

•  

  zool(11,"hello", "world")

TJ04_06. Suppose you have a static method called printAmerican that takes the month (e.g. "July"), day (e.g. 23), year (e.g. 2018), and day of the week (e.g. "Thursday") as parameters and displays them in American format (e.g. Thursday, July 23, 2018).  Which one of the following programs calls the method correctly to print the date.

• public class PrintAmerican{

      //method diefition goes here

      public static void main(String[] aaa){

          PrintAmerican("July", 23, 2018, "Thursday");

      }

  }

• PrintAmerican.PrintAmerican("July", 23, 2018, "Thursday");

• 
  public class PrintAmerican{

      

      //method definition goes here

      

      public static void main(String[] aaa){

          main.PrintAmerican("July", 23, 2018, "Thursday");

      }

  }

•  

  none of the other choices is correct

• 
  public class PrintAmerican{

      

      //method definition goes here

      

      public static void foo(String[] aaa){

          PrintAmerican("July", 23, 2018, "Thursday");

      }

  }

TJ04_07. in the following code the print statements  are numbered (the numbers look like //1, //2, //3, //4)

list the numbers in the order in which they are executed.

public class foo{
    public static void main(String[] args) {
        zippo("foo");
        System.out.println("foo");//1
        baffle("zoo");
    }
    public static void baffle(String blimp) {
        System.out.println(blimp);//2
    }
    public static void zippo(String quince) {
        System.out.println(quince);//3
        System.out.println(quince);//4
    }
}

•  

  3142

•  

  none of the other answers is correct

• 3412

• 1324

• 3124

TJ04_08. in order to use the Math class you must first import the package that contains it.

• True

• False

TJ04_09. One of the methods of the class Math is called atan.

• True

• False

TJ04_11. The largest possible long is 922,337,203,685

• True

• False

how much is 2 multiplied by itself 20 times?

•  

  2097152.0

• 1048576.0

• 4194304.0

• 524288.0

•  

  none of the other answers is correct