Controlling Program Flow →mediumMultiple ChoiceObjective-mapped

1Z0-829 enum ordinal Practice Question

Exhibit

enum Day { MONDAY, TUESDAY, WEDNESDAY, THURSDAY, FRIDAY }
int numLetters = switch (day) {
    case MONDAY, FRIDAY, SUNDAY -> 6;
    case TUESDAY -> 7;
    default -> { int len = day.name().length(); yield len; }
};
System.out.println(numLetters);

Refer to the exhibit. The exhibit shows a code snippet. What is the output when the variable day is set to Day.WEDNESDAY?

⚠ Common exam trap

The trap here is that candidates forget that switch cases fall through by default if break statements are missing, and they often overlook the effect of a default case that executes after fall-through, leading them to miscalculate the total.

Answer choices

Why each option matters

Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.

Correct answer & explanation

✓

(9) because the switch statement on Day.WEDNESDAY (ordinal 2) does not have break statements for cases WEDNESDAY, THURSDAY, FRIDAY, and SATURDAY, causing fall-through. Execution adds values: WEDNESDAY (3), THURSDAY (4), FRIDAY (5), SATURDAY (6), totaling 18. Then the default case subtracts 9, resulting in 9.

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

✗
7
Why it's wrong here
7 corresponds to TUESDAY, not WEDNESDAY.
✗
Compilation error
Why it's wrong here
The code compiles successfully.
✗
6
Why it's wrong here
6 corresponds to MONDAY, FRIDAY, or SUNDAY, not WEDNESDAY.
✓
9
Why this is correct
The default branch yields the length of "WEDNESDAY", which is 9.

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1Z0-829 enum ordinal Practice Question

Exhibit

Why each option matters

Option-by-option breakdown

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