Oracle Exam 1Z0-819 Topic 5 Question 84 Discussion

Actual exam question for Oracle's 1Z0-819 exam

Question #: 84
Topic #: 5

[All 1Z0-819 Questions]

Given:

You want to calculate the average of the Player's score.

Which statement inserted on line 1 will accomplish this?

Aplayers.stream().average().orElse(0.0);

Bplayers.stream().mapToInt(a -> a.score).average().orElse(0.0);

Cplayers.stream().mapToDouble(a -> a.score).average();

Dplayers.stream().map(a -> a.score).average();

Show Suggested Answer

Suggested Answer: B

by Mel at Jun 30, 2024, 06:33 PM

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Daisy

5 months ago

I think D is definitely not the correct answer, it doesn't return the average.

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5 months ago

I'm torn between B and C. Both seem to get the job done, but C might be a bit more efficient since it maps directly to doubles.

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Valentin

4 months ago

I agree with you, C might be more efficient as it directly maps to doubles for calculating the average.

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Valentin

5 months ago

I think B is the correct option because it specifically maps the scores to integers before calculating the average.

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Lorrine

5 months ago

I think the answer is B.

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Diego

6 months ago

Option B looks perfect! It streams the players, maps the scores to integers, and then calculates the average. Elegant!

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Gerry

5 months ago

I agree, Option B is the correct choice for calculating the average of the Player's score.

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Jennifer

5 months ago

Option B looks perfect! It streams the players, maps the scores to integers, and then calculates the average. Elegant!

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