1Z0-811 Control Flow and Loops Practice Question
Which THREE are valid loop constructs in Java? (Choose three.)
⚠ Common exam trap
Oracle often tests the recognition of valid Java syntax versus constructs from other languages, so candidates may mistakenly select `repeat-until` or `loop` if they are familiar with other programming languages or do not recall Java's exact loop keywords.
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
✓
while (condition) { }
The `while` loop is a standard Java construct that repeatedly executes a block of code as long as the specified boolean condition evaluates to `true`. The syntax `while (condition) { }` is valid even with an empty body, as the condition is checked before each iteration.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
while (condition) { }
Why this is correct
Standard while loop.
- ✗
repeat { } until (condition);
Why it's wrong here
Not a Java keyword; Java uses do-while.
- ✓
do { } while (condition);
Why this is correct
Valid do-while loop.
- ✗
loop (condition) { }
Why it's wrong here
No such construct in Java.
- ✓
for (initialization; condition; update) { }
Why this is correct
Standard for loop.
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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. Which TWO of the following are valid loop constructs in Java? (Choose two.)
easy- ✓ A.do {} while (false);
- B.while (true)
- C.for each (int i : array) {}
- D.loop (int i = 0; i < 10; i++) {}
- ✓ E.for (int i = 0; i < 10; i++) {}
Why A: A valid do-while loop; the semicolon after the condition is required. Option E is a standard for loop. Option B is invalid because 'while (true)' lacks a loop body (statement or block). Option C uses incorrect syntax: 'for each' is not Java; the correct syntax is 'for (int i : array)'. Option D uses 'loop' which is not a Java keyword; the correct keyword is 'for'.
JA
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This 1Z0-811 practice question is part of Courseiva's free Oracle certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 1Z0-811 exam.