Question 386 of 513
1Z0-829 Working with Streams and Lambda Expressions Practice Question
Which TWO are terminal operations on the Stream interface? (Choose two.)
⚠ Common exam trap
Candidates often confuse intermediate operations (like `filter`, `map`, `sorted`) with terminal operations because they are commonly chained together, but only terminal operations produce a non-stream result or side effect and close the stream.
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
✓
count()
A is correct because `count()` is a terminal operation that reduces the stream to a single `long` value by counting the number of elements after processing the pipeline. It triggers the stream pipeline execution and consumes the stream, making it a terminal operation per the `Stream` interface specification.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
count()
Why this is correct
Terminal operation that returns the count of elements.
- ✓
forEach()
Why this is correct
Terminal operation that performs an action for each element.
- ✗
filter()
Why it's wrong here
Intermediate operation, returns a new stream.
- ✗
map()
Why it's wrong here
Intermediate operation, returns a new stream.
- ✗
sorted()
Why it's wrong here
Intermediate operation, returns a new stream.
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Last reviewed: Jun 25, 2026
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