1Z0-811 Control Flow and Loops Practice Question
Which TWO of the following are valid loop constructs in Java? (Choose two.)
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
✓
do {} while (false);
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'.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
do {} while (false);
Why this is correct
Correct do-while loop syntax, including the required semicolon.
- ✗
while (true)
Why it's wrong here
Missing statement or block after while condition; causes compilation error.
- ✗
for each (int i : array) {}
Why it's wrong here
Java uses 'for (int i : array)' not 'for each'.
- ✗
loop (int i = 0; i < 10; i++) {}
Why it's wrong here
'loop' is not a Java keyword; use 'for' instead.
- ✓
for (int i = 0; i < 10; i++) {}
Why this is correct
Correct syntax for a for loop.
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