Question 308 of 481
1Z0-811 Control Flow and Loops Practice Question
A developer needs to iterate over a 2D array row by row and exit early if a specific value is found in any cell. Which nested loop structure with control statements is most efficient?
⚠ Common exam trap
Oracle often tests the distinction between break (unlabeled) and labeled break in nested loops, trapping candidates who assume break exits all loops when it only exits the innermost one.
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
✓
Outer for with inner for, use labeled break
A labeled break allows the developer to exit both the inner and outer loops immediately when the target value is found. This is the most efficient approach for a row-by-row search in a 2D array, as it avoids unnecessary iterations after the value is located. Using a labeled break provides precise control over nested loop termination without requiring additional flags or method extraction.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Outer for with inner for, use return
Why it's wrong here
Return exits the method, which is too broad and may not be desired.
- ✗
Outer while with inner for, use continue
Why it's wrong here
Continue only skips to the next iteration of the inner loop.
- ✗
Outer do-while with inner while, use break without label
Why it's wrong here
Break without label only exits the inner loop, requiring an additional flag to exit outer loop.
- ✓
Outer for with inner for, use labeled break
Why this is correct
Labeled break can exit the outer loop directly, making it efficient.
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Same concept, more angles
1 more way this is tested on 1Z0-811
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. Consider a method that processes a two-dimensional array (matrix). It uses nested for loops. The inner loop uses a label 'outer' to break out of the outer loop. Under what condition is this label beneficial?
hard- A.When you want to skip the current iteration of the outer loop
- ✓ B.When you need to exit the outer loop from inside the inner loop
- C.When you have a single loop and need to break to a specific point
- D.When you want to exit the inner loop only
Why B: In Java, a labeled break statement allows you to exit an outer loop from within a nested inner loop. The label 'outer' is placed before the outer loop, and when the break outer; statement executes inside the inner loop, control jumps directly to the statement after the outer loop. This is beneficial specifically when you need to terminate the entire outer loop based on a condition detected inside the inner loop.
Last reviewed: Jul 4, 2026
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