Discuss Confluent CCDAK Exam Topic 4 Question 89

Suppose you have 6 brokers and you decide to create a topic with 10 partitions and a replication factor of 3. The brokers 0 and 1 are on rack A, the brokers 2 and 3 are on rack B, and the brokers 4 and 5 are on rack C. If the leader for partition 0 is on broker 4, and the first replica is on broker 2, which broker can host the last replica? (select two)

Suggested Answer: B, E

When you create a new topic, partitions replicas are spreads across racks to maintain availability. Hence, the Rack A, which currently does not hold the topic partition, will be selected for the last replica

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26 comments · newest first

Billi 1 month ago

Yeah, I’d go with 1 and 5 too. Need to avoid rack B for the last replica!

Yun 1 month ago

I feel like broker 5 is a good choice. It's in a different rack.

Gerald 2 months ago

Agreed! So, maybe brokers 1 and 5?

Leota 2 months ago

This question is tricky! I think the last replica can't be on rack B.

Marshall 2 months ago

I’d go with D) 5 and F) 3. They’re on different racks!

Eileen 2 months ago

So, if broker 4 is the leader and broker 2 is the first replica, we can't use those racks.

Jamal 2 months ago

Right! We need to avoid placing replicas on the same rack.

Dante 2 months ago

This question is tricky! I think it’s about rack awareness.

Alpha 3 months ago

I’m leaning towards B and E. But I see the rack issue too.

Jenelle 3 months ago

I agree with D and F. We need to avoid rack A for the last replica.

Telma 3 months ago

I feel confused about the replication factor. Is it really necessary?

Janey 3 months ago

I think the answer is D and F. They are in different racks.

Reiko 3 months ago

So, is it really true that we can't have replicas on the same rack?

Gilma 4 months ago

I think it has to be on a different rack, so D and F make sense.

Lang 5 months ago

Wait, why can't it be on broker 1?

Dawne 5 months ago

Definitely options D and F!

Dana 5 months ago

The last replica can't be on the same rack as the leader or first replica.

Adela 6 months ago

I agree, it has to be 5 or 3 for sure!

Willie 6 months ago

Wait, why can't it be on broker 1?

Talia 6 months ago

I think it could be broker 5 or 3.

Gladys 6 months ago

Definitely, it has to be on rack C or A.

Enola 6 months ago

The last replica can't be on the same rack as the leader.

Rodrigo 6 months ago

I’m confused about the options. Can’t the last replica be on broker 3 too? It seems like it fits the criteria.

Tracey 7 months ago

I practiced a similar question, and I think the last replica could be on broker 5 since it's on a different rack from both the leader and the first replica.

Luis 7 months ago

I'm not entirely sure, but I remember something about balancing replicas across racks to avoid single points of failure. Maybe brokers 1 or 5?

Apolonia 7 months ago

I think the last replica needs to be on a different rack from the leader and the first replica, so it can't be on broker 2.

Confluent CCDAK Exam - Topic 4 Question 89 Discussion