The Best Kafka Interview Questions

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If you're looking for Apache Kafka Interview Questions for Experienced or Freshers, you are at right place. Mindmajix offers Advanced Apache Kafka Interview Questions 2018 that helps you in cracking your interview & acquire dream career as Apahe Kafka Developer.

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The Best Kafka Interview Questions:

The Best Kafka Interview Questions

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Q: Explain what is Kafka? Kafka is a publish-subscribe messaging application which is coded in “ Scala ”. It is an open source message broker project which was started by the Apache software. The design pattern of Kafka is mainly based on the transactional logs design. Q: What are the different components that are available in Kafka? The different components that are available in Kafka are as follows: 1. Topic:  this is nothing but a stream of messages that belong to the same type 2. Producer:  this is used for publishing messages to a specific topic 3. Brokers:  It is a set of servers which has a capability of storing publishers messages. Consumer- responsible for subscribing to various topics and pulls the data from different brokers Q: What is the role of offset in Kafka? Offset is nothing but an unique id that is assigned to the partitions. The messages are contained in this partitions. The important aspect or use of offset is that it identifies every message with the id which is available within the partition.

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Q: What is a consumer group? A consumer group is nothing but an exclusive concept of Kafka. Within each and every Kafka consumer group, we will have one or more consumers who actually consume subscribed topics. Q: Explain the role of the zookeeper in Kafka? Within the Kafka environment, zookeeper is used to store offset related information which is used to consume a specific topic and by a specific consumer group. Q: Would it be possible to use Kafka without the zookeeper? No, it is not possible to use Kafka without the zookeeper. The user will not able to connect directly to the Kafka server in the absence of zookeeper. For some reason, if zookeeper is down then the individual will not able to access any of the client requests. Q: Elaborate on the terms leader and follower in Kafka environment? The concept of leader and follower is maintained in Kafka environment so that the overall system ensures load balancing on the servers.

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Q: What does ISR stand in Kafka environment? ISR stands for In sync replicas. They are classified as a set of message replicas which are synched to be leaders. Q: What is the replica? What does it do? A replica can be defined as a list of essential nodes that are responsible to log for a particular partition, and it doesn't matter whether they actually play a role of a leader or not. Q: Why are the replications are considered critical in Kafka environment? The main reason why replications are needed because they can be consumed again in an uncertain event of machine error or program malfunction or the system is down due to frequent software upgrades. So to make sure to overcome these, replication makes sure that the messages published are not lost.

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Q: What are the advantages of Kafka technology? The following are the advantages of using Kafka technology: 1. It is fast 2. It comprises of brokers. Every single broker is capable of handling megabytes of data. 3. It is scalable 4. A large dataset can be easily analyzed 5. It is durable 6. It has a distributed design which is robust in nature Q: Is apache Kafka is a distributed streaming platform? if yes, what you can do with it? Yes, apache Kafka is a streaming platform. A streaming platform contains the vital three capabilities, they are as follows: 1. It will help you to push records easily 2. It will help you store a lot of records without giving any storage problems 3. It will help you to process the records as they come in Q: What can you do with Kafka? With the help of Kafka technology we can do the below: >> We can build a real-time stream of data pipelines which will help to transmit data between two systems >> Build a real-time streaming platform which can actually react to the data Q: What is the core API in Kafka? They are four main core API’s: 1. Producer API 2. Consumer API 3. Streams API 4. Connector API All the communications between the clients happen over through high-performance language via TCP protocol.

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Q: Explain the functionality of producer API in Kafka? The producer API is responsible where it will allow the application to push a stream of records to one of the Kafka topics. Q: Explain the functionality of Consumer API in Kafka? The Consumer API is responsible where it allows the application to receive one or more topics and at the same time process the stream of data that is produced. Q: Explain the functionality of Streams API in Kafka? The Streams API is responsible where it allows the application to act as a processor and within the process, it will be effectively transforming the input streams to output streams. Q: Explain the functionality of Connector API in Kafka? The Connector API is responsible where it allows the application to stay connected and keeping a track of all the changes that happen within the system. For this to happen, we will be using reusable producers and consumers which stays connected to the Kafka topics. If you're looking for Apache Kafka Interview Questions for Experienced or Freshers , you are at right place. Mindmajix offers Advanced Apache Kafka Interview Questions 2018 that helps you in cracking your interview & acquire dream career as Apahe Kafka Developer.

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