1Z0-829 Controlling Program Flow Practice Question
A developer writes code to iterate over a list of strings and print each element. The code uses an enhanced for loop. Which statement is true about the enhanced for loop?
⚠ Common exam trap
Test-takers frequently confuse the enhanced for loop's flexibility with the ability to modify the collection safely, or mistakenly think it requires a counter like a traditional for loop, leading them to choose options B or D.
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
✓
It can be used with arrays and any object that implements Iterable.
The enhanced for loop (for-each) in Java can iterate over arrays and any object that implements the Iterable interface, which includes all Collection classes (e.g., List, Set, Queue). This is because the for-each loop internally uses an iterator for Iterable objects or array indexing for arrays, making it a versatile construct for traversing elements without needing an explicit counter.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
It can be used with arrays and any object that implements Iterable.
Why this is correct
The enhanced for loop works on arrays and Iterable objects.
- ✗
It can only be used with arrays.
Why it's wrong here
It can also be used with collections that implement Iterable.
- ✗
It requires an explicit counter variable.
Why it's wrong here
The enhanced for loop hides the counter variable.
- ✗
It allows removing elements from the collection during iteration without ConcurrentModificationException.
Why it's wrong here
Removing elements during iteration with enhanced for loop causes ConcurrentModificationException.
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