Confluent CCAAK Exam - Topic 4 Question 4 Discussion

Actual exam question for Confluent's CCAAK exam

Question #: 4
Topic #: 4

Your Kafka cluster has four brokers. The topic t1 on the cluster has two partitions, and it has a replication factor of three. You create a Consumer Group with four consumers, which subscribes to t1.

In the scenario above, how many Controllers are in the Kafka cluster?

AOne

Btwo

Cthree

DFour

Show Suggested Answer

Suggested Answer: A

In a Kafka cluster, only one broker acts as the Controller at any given time. The Controller is responsible for managing cluster metadata, such as partition leadership and broker status. Even if the cluster has multiple brokers (in this case, four), only one is elected as the Controller, and others serve as regular brokers. If the current Controller fails, another broker is automatically elected to take its place.

by Sabine at Jun 16, 2025, 05:24 PM

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Eloisa

2 months ago

I’m pretty sure it’s one too, but I’m still learning!

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Sheron

2 months ago

Yup, one Controller manages the whole cluster.

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Lorenza

3 months ago

Totally agree, it’s always just one!

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Stevie

3 months ago

Wait, I thought there could be more than one?

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Ciara

3 months ago

There’s only one Controller in a Kafka cluster.

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Jerlene

3 months ago

I feel like I read that there can only be one active Controller at a time, but I’m not 100% confident about that.

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Sophia

4 months ago

This question seems familiar. I practiced one where it asked about the number of partitions and replicas, but I don’t recall the Controller part clearly.

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Annabelle

4 months ago

I’m not entirely sure, but I remember something about Controllers being unique in a cluster. So maybe it’s A?

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Jeanice

4 months ago

I think there’s only one Controller in a Kafka cluster, right? It manages the brokers and partitions.

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Loise

4 months ago

This is a tricky one. I know the Controller is responsible for managing the cluster, but I'm not sure if the number of brokers, partitions, or consumers has any bearing on the number of Controllers. I'll have to think about this a bit more before answering.

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Shad

4 months ago

Okay, let me think this through. The number of brokers, partitions, and consumers doesn't seem directly relevant to the number of Controllers. I believe there is typically only one active Controller in a Kafka cluster, so I'll go with option A.

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Jose

5 months ago

Hmm, I'm a bit confused on this one. The question mentions a topic with two partitions and a replication factor of three, as well as a Consumer Group with four consumers. I'm not sure how those details relate to the number of Controllers in the cluster.

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Octavio

5 months ago

I think the key here is understanding the role of the Controller in a Kafka cluster. Since the question mentions a cluster with four brokers, my guess is that there would be one Controller managing the cluster.

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Madelyn

7 months ago

Alright, let's see here... If there are four brokers and the topic has a replication factor of three, then the number of Controllers must be B) two. It's simple math, really. Or is it? *laughs nervously*

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Avery

5 months ago

Oh, I see. Thanks for the clarification!

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Camellia

6 months ago

Yes, that's correct. The number of Controllers in the Kafka cluster is two.

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Isaac

6 months ago

I think the answer is B) two.

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Gabriele

7 months ago

I'm stumped. Is the answer A) One? Or maybe it's C) three? Kafka is such a mind-bending technology, it's no wonder they're paying us so much to figure it out.

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Mozell

6 months ago

B) two

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Trevor

7 months ago

A) One

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Jade

7 months ago

B) two

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Bettina

7 months ago

A) One

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Edna

7 months ago

This question is a piece of cake! The answer is clearly B) two. How else would the Kafka cluster have a replication factor of three with only four brokers?

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