Multiple choice technology web technology

Given: 3. public class TestDays { 4. public enum Days { MON, TUE, WED }; 5. public static void main(String[] args) { 6. for(Days d : Days.values() ) 7. ; 8. Days [] d2 = Days.values(); 9. System.out.println(d2[2]); 10. } 11. } What is the result? (Choose all that apply.)

  1. TUE

  2. Wed

  3. The output is unpredictable

  4. Compilation fails due to an error on line 4

  5. Compilation fails due to an error on line 6

  6. Compilation fails due to an error on line 8
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Days.values() returns [MON, TUE, WED] in declaration order. Index 2 (0-based) is WED. The empty for-each loop is valid Java syntax. The output is 'WED'.

AI explanation

To answer this question, let's go through each option to understand why it is correct or incorrect:

Option A) TUE - This option is incorrect because the output is not TUE.

Option B) Wed - This option is correct because the output will be "Wed".

Option C) The output is unpredictable - This option is incorrect because the output is predictable and will be "Wed".

Option D) Compilation fails due to an error on line 4 - This option is incorrect because there is no error on line 4. Line 4 declares an enum called "Days" with the values MON, TUE, and WED.

Option E) Compilation fails due to an error on line 6 - This option is incorrect because there is no error on line 6. Line 6 is a for-each loop that iterates over the values of the enum "Days".

Option F) Compilation fails due to an error on line 8 - This option is incorrect because there is no error on line 8. Line 8 creates an array "d2" and assigns the values of the enum "Days" to it.

The correct answer is B) Wed. This option is correct because the line 9 prints the value at index 2 of the array "d2", which corresponds to "Wed".

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