Oracle Exam 1Z0-134 Topic 3 Question 95 Discussion

Actual exam question for Oracle's 1Z0-134 exam

Question #: 95
Topic #: 3

Review this scenario of an application running on a storage-disabled, managed Coherence server that uses a Coherence two-tier near cache:

Cache data is already written to the distributed cache.

There is a local near cache configured on the application side (storage-disabled node).

Application requests the data from Coherence twice.

Assuming this is the server's first access of this data from the cache, how many network round trips between Coherence cluster instances take place in total? (Choose the best answer.)

Show Suggested Answer

Suggested Answer: C

by Corrina at Jun 25, 2024, 12:15 AM

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Esteban

5 months ago

Ah, the joys of Coherence caching! It's like a game of cache and seek, except the only prize is a headache. But I'm feeling lucky today, so I'll go with B) 4 round trips. After all, who needs sleep when you can spend all night trying to figure out these cache conundrums?

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Kathrine

5 months ago

This is a real head-scratcher, isn't it? Let me see if I can crack this nut. Okay, so the first request hits the near cache, no round trip. The second request also hits the near cache, still no round trip. But then the server needs to fetch the data from the distributed cache, that's one round trip. And when the data is returned to the application, that's another round trip. So that's a total of 2 network round trips. D) 2 is the way to go, my friends.

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Kandis

5 months ago

Yeah, I agree. The first two requests don't require any round trips, but the last two do.

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Jannette

5 months ago

I think you're right, it does seem like the answer is 2 network round trips.

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Dorethea

5 months ago

Wait, wait, wait. If the data is already in the distributed cache, then the first request from the application should hit the near cache, no round trip. The second request also hits the near cache, still no round trip. But then the server needs to fetch the data from the distributed cache, that's one round trip. So the total is 1 network round trip. C) 1 is the answer.

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Yan

5 months ago

Hmm, this is tricky. I'm thinking the first request hits the near cache, no round trip. The second request also hits the near cache, still no round trip. But then the server needs to fetch the data from the distributed cache, that's one round trip. And when the data is returned to the application, that's another round trip. So that's a total of 2 network round trips. I'll go with D) 2.

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Mira

4 months ago

Agreed, let's go with that.

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Martina

4 months ago

So, D) 2 is the best answer.

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Nan

4 months ago

Yeah, the near cache saves us some trips.

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Ilene

5 months ago

I think it's 2 round trips too.

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Shasta

5 months ago

You make a good point, maybe the answer is actually A) 3 after all.

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Amber

5 months ago

Okay, let me think this through. If the data is already in the distributed cache, then the first request should hit the near cache, no network round trip. The second request should also hit the near cache, so still no network round trip. But the first access from the server to the distributed cache would require one round trip. So the total is 1 network round trip. I'll go with C) 1.

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