Oracle Exam 1Z0-829 Topic 8 Question 35 Discussion

Actual exam question for Oracle's 1Z0-829 exam

Question #: 35
Topic #: 8

[All 1Z0-829 Questions]

Given the code fragment:

Which code fragment returns different values?

Aint sum = listOfNumbers. parallelStream () reduce (5, Integer:: sum) ;

Bint sum = listOfNumbers. Stream () reduce (5, (a, b) -> a + b) ;

Cint sum = listOfNumbers. Stream () reduce ( Integer:: sum) ; +5;

Dint sum = listOfNumbers. parallelStream () reduce ({m, n) -> m +n) orElse (5) +5;

Eint sum = listOfNumbers. Stream () reduce (0, Integer:: sum) + 5

Show Suggested Answer

Suggested Answer: B

by Aretha at Mar 22, 2025, 04:06 PM

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Blondell

1 months ago

I'm no mathematician, but I'm pretty sure 5 + 5 equals 10. So option E looks like the way to go! Though I do wonder if that's too obvious. Hmm, maybe I should have paid more attention in algebra class...

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Roxane

2 days ago

I think you're right, option E seems to be the correct one.

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Lenna

1 months ago

Anyone else see the pun in 'reduce' and 'sum'? It's like they're trying to reduce us to a sum! *laughs* Anyway, I'm going with C. That extra +5 at the end just feels a bit too sneaky for my liking.

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Lettie

3 days ago

I agree with you, C seems like the safest choice. Let's go with that.

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Lettie

4 days ago

I think D is the one that returns different values. That extra orElse(5) is suspicious.

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Lettie

14 days ago

Haha, I see what you did there! I'm going with B, seems straightforward.

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Buck

1 months ago

This is a tough one! I'm leaning towards D, since the parallelStream() might be more efficient for a large list. But the orElse(5) part makes me a bit nervous. Gotta love those functional programming tricks!

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Sabra

1 months ago

I'm torn between B and E. Both use the stream() method, but E adds the 5 at the end, which could be more readable. Hmm, decisions, decisions.

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Mayra

11 days ago

User 3: I agree with Mayra, E seems like the better choice for readability.

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Alonzo

22 days ago

User 2: I see your point, but E also adds 5 at the end which could make it more readable.

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Ilda

23 days ago

User 1: I think B is the correct one because it uses the reduce method with a lambda function.

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Jesse

2 months ago

Option B looks the most straightforward to me. The stream() method with reduce() and lambda expressions seems like the clearest way to get the sum of the list.

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