Java quiz 21: Working with operators

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This code shows how the operators and the operands work in Java.

Java quiz 21: Working with operators

Level: Easy

What is written to the standard output as the result of executing the following code?

public class MyClass
  static int x = 3;
  static int y = 7;
  static boolean isDefect;
  public static void main(String[] args)
    if(x == (y - 4) && !isDefect)
      x += 2;
      y += 3;
    if(y == 10 || x == 3)
      y += 2;
    System.out.print("x" + x + ", y" + y);
Author: Sar Maroof

Select the correct answer.

Answer explanation

  1. The first conditional statement if(x == (y – 4) && !isDefect) returns true, because
    x = y – 4 = 3 and !isDefect is false. Boolean variables are by default false.
  2. The statement x += 2 increments the value of x by 2. So, x = 3 + 2 = 5 and the statement y += 3 increments the value of y by 3. So, y = 7 + 3 = 10.
  3. By sequences of if statements the body of all the true statements are executed.
  4. The statement if(y == 10 || x == 3) also returns true, because y is equal to 10. x is not equal to 3, but by || (OR) operators the statement returns true if one of the operands is true.
  5. The statement y += 2 increments the value of y by 2. So, y = 10 + 2.

The correct answer is: a.

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Sar Maroof is graduated from HBO Amsterdam "higher professional education". He is a professional computer programming teacher, gives master classes and publishes technical articles. His experience with developing software started from 2001 and he has worked as a software developer for several big as well as small companies and later as a freelancer. He is the author of Java quizmaster and Build a Java application in 7 days.

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