10 Kafka Interview Questions That Recently Asked

Here're ten interview questions that were asked during Kafka's interview.  These are useful to update your knowledge.


10 Kafka Interview Questions That Recently Asked


Kafka Interview Questions


1. What is Kafka?

Kafka is a framework of Publisher and Subscribe. It reads messages from the Producer and allows them to read by Subscribers. It keeps store all the producer messages in the form of topics (underlying partitions). It also maintains logs.


2. What is a Consumer group?

Each consumer is part of some Consumer group. By adding more consumers to a Consumer group, you can balance the load. In general, the Consumer group reads data from the same topic. The number of partitions in a Topic always should be the same as Consumers in a particular CG (consumer group).


3. What is Fault-Tolerance?

Each partition is replicated on multiple servers. So, when one partition is failed, the other backup will deliver. So this concept is called Fault-tolerance.


4. Can we decrease the partitions that we created?

No, you can't decrease the partitions once created. But, you can increase the partitions.


5. What is the architecture of Kafka?

The architecture is a combination of Producer, Broker, Subscriber, and Zookeeper. It can handle messages from multiple producers. It can have multiple Brokers (Sometimes it is called Kafka Broker). Zoooker oversees the Kafka cluster and has information about consumer's messages.


6. How to start Kafka Broker?

In Linux environments, you can start using $ bin/kafka-server-start.sh config/server-1.properties

$ bin/kafka-server-start.sh config/server-2.properties

So, you start Kafka server using different Server properties. Here Server-1, Server-2, and so on.


7. What is Leader Balancing in Kafka?

A partition in a Broker acts as a leader. The partitions of replicas are followers of this leader. In case of failure, the followers act as leads and deliver messages to consumers. This is called Leader balancing.


8. What is the real use of Broker?

The Broker's main functionality is to handle the storage of messages in topics.


9. What are the two main functions of Zookeeper?

  • Oversee the function of the Kafka cluster (all the nodes)
  • It commits each offset after reading by the consumer. So, in case of Consumer failure, with the help of Zooker, the consumer starts reading from the next offset (after it recovered from failure)

 10. What is the Retention period?

The amount of Time that Kafka stores messages in Topics are called the retention period. There are two types of retentions - Time-based and Storage Based


References

Comments

Post a Comment

Thanks for your message. We will get back you.

Popular posts from this blog

How to Fix Python Syntax Errors Quickly

Image
In Python, you can call parsing errors Syntax errors. How to fix the syntax errors quickly, I can show in this post. Also, check Python Syntax Errors Cheat Sheet. Python Syntax Error. If you run the Python code, the interpreter first parses the logic. If any errors found, it is the developer's responsibility to fix them. Courtesy: Python documentation. >>> while True print ( 'Hello world' ) File "<stdin>" , line 1 while True print ( 'Hello world' ) ^ SyntaxError : invalid syntax How to Fix the Syntax Error First, check for the line number. In the above case, it is '1'. Then look for the symbol '^'. The issue is at the PRINT function. The reason is before the PRINT function you need a colon ':'. That is the reason, you are getting error. This is a syntax error. Find below the corrected logic: >>> while True : print ( 'Hello world' ) File "<stdin
Read more

7 AWS Interview Questions asked in Infosys, TCS

Image
I have shared 7 amazing AWS interview questions for your quick reference. 1). What is AWS? Amazon Web Services (AWS) provides on-demand computing resources and services in the cloud, with pay-as-you-go pricing. For example, you can run a server on AWS that you can log on to, configure, secure, and run just as you would a server that's sitting in front of you 2). What you can do with AWS? Store public or private data. Host a static website. These websites use client-side technologies (such as HTML, CSS, and JavaScript) to display content that doesn't change frequently. A static website doesn't require server-side technologies (such as PHP and ASP.NET). Host a dynamic website or web app. These websites include classic three-tier applications, with web, application, and database tiers. Support students or online training programs. Process business and scientific data. Handle peak loads. AWS Questions 3). What is the Security group? A security group acts as a virtual fi
Read more

Hyperledger Fabric: 20 Real Interview Questions

Image
I am practicing Hyperledger. This is one of the top listed blockchains. This architecture follows R3 Corda specifications. Sharing the interview questions with you that I have prepared for my interview. Though Ethereum leads in the real-time applications. The latest Hyperledger version is now ready for production applications. It has now become stable for production applications. The Hyperledger now backed by IBM. But, it is still an open source. These interview questions help you to read quickly. The below set of interview questions help you like a tutorial on Hyperledger fabric. Hyperledger Fabric Interview Questions 1). What are Nodes? In Hyperledger the communication entities are called Nodes. 2). What are the three different types of Nodes? - Client Node - Peer Node - Order Node The Client node initiates transactions. The peer node commits the transaction. The order node guarantees the delivery. 3). What is Channel? A channel in Hyperledger is the subnet of
Read more