1Z0-829 Controlling Program Flow Practice Question
This 1Z0-829 practice question tests your understanding of controlling program flow. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
Which two statements about the enhanced for-each loop in Java are true? (Choose two.)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
It requires the target to implement the Iterable interface, except for arrays.
Options A and C are correct. The for-each loop can iterate over arrays and any object that implements java.lang.Iterable, including common collection classes. Option B is false because modifying the underlying collection during iteration (except through the iterator's own remove method) can cause a ConcurrentModificationException. Option D is false because the for-each loop does not provide an explicit counter; you must use a traditional for loop for that. Option E is false because Stream does not implement Iterable, so you cannot use for-each directly on a Stream; you would need to convert it to a collection or use forEach().
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
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 requires the target to implement the Iterable interface, except for arrays.
Why this is correct
For arrays, the loop works directly; for other objects, they must implement Iterable.
Related concept
Read the scenario before looking for a memorised answer.
✗
It can safely modify the underlying collection during iteration.
Why it's wrong here
Modifying a collection during for-each iteration usually throws ConcurrentModificationException.
✗
It can be used to iterate directly over a Stream object.
Why it's wrong here
Stream does not implement Iterable; you need to use Stream's forEach method or collect into a collection.
✓
It can be used to iterate over an array.
Why this is correct
The for-each loop works with arrays and collections.
Related concept
Read the scenario before looking for a memorised answer.
✗
It provides an implicit counter variable that can be accessed.
Why it's wrong here
No counter is available; you must use a traditional for loop to track indices.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A practitioner preparing for the 1Z0-829 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
Got this wrong? Here's your next step.
Identify which 1Z0-829 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Controlling Program Flow — This question tests Controlling Program Flow — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: It requires the target to implement the Iterable interface, except for arrays. — Options A and C are correct. The for-each loop can iterate over arrays and any object that implements java.lang.Iterable, including common collection classes. Option B is false because modifying the underlying collection during iteration (except through the iterator's own remove method) can cause a ConcurrentModificationException. Option D is false because the for-each loop does not provide an explicit counter; you must use a traditional for loop for that. Option E is false because Stream does not implement Iterable, so you cannot use for-each directly on a Stream; you would need to convert it to a collection or use forEach().
What should I do if I get this 1Z0-829 question wrong?
Identify which 1Z0-829 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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