Java quiz 08: Array elements

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Here is a simple array of Strings with the length of 5. We assigned the values of all the elements of the array.

If you are not familiar with arrays, you can read my article “Java arrays” before answering this quiz.

Java quiz 8: Array elements

Level: Normal

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

import java.util.Arrays;

public class ProgrammingLanguage
  public static void main(String[] args)
    String[] lang = new String[5];
    lang[0] = "Java ";
    lang[1] = "C++ ";
    lang[2] = "Ruby ";
    lang[3] = "Perl ";
    lang[4] = "Python ";
    for (int i = 0; i < lang.length; i++)
      if (i == 2 || i == 4)
                                               Author: Sar Maroof

Select the correct answer.

Answer explanation

  1. In the beginning the order of the elements of the array pLanguage is
    Java C++ Ruby Perl Python
  2. The statement Arrays.sort(pLanguage); orders the elements of the array alphabetically as follows: C++ Java Perl Python Ruby
  3. The conditional statement if (i == 2 || i == 4) is only true for the second and forth elements. The second element isn’t Java but Perl, because the index of arrays starts from zero. The fourth element is Ruby. Therefore the program writes Perl Ruby to the standard output.

The correct answer is: b.

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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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