Kafka Interview Questions and Answers:
1. What is Kafka?
Kafka is an open source message broker project coded in Scala/Python/Java. Kafka is originally developed by LinkedIn and developed as an open sourced in early.
2. Which are the components of Kafka?
The major components of Kafka are:
Topic: A group of messages belongs to the same type
Producer: Using the producer can publish messages to the topic
Consumer: Pulls data from the brokers
Brokers: This is the place where the disclose messages are stored known as servers.
3. What role does Zookeeper play in a cluster of Kafka?
Kafka is an open source system and it also a distributed system and it is built to use Zookeeper. The basic responsibility of Zookeeper is to build coordination between different nodes in a cluster. Zookeeper works as periodically commit offset so that if any ode gets failure it will be used to recover from previously committed offset. The Zookeeper is also responsible for configuration management leader detection, finding if any node leaves or joins the cluster, synchronization.
4. Distinguish between the Kafka and Flume?
Flume’s major use-case is incorporated with the Hadoop’s monitoring system, file formats, file systems, and utilities. It is used for Hadoop integration. Flume will be the best option to use when you have non-relational data sources. But Kafka used for the distributed publish-subscribe messaging system. Kafka is not developed for Hadoop and using Kafka to read and write data to Hadoop considerably than the Flume. Kafka is a highly reliable and scalable enterprise messaging system to connect different multiple systems.
5. It is possible to use Kafka without Zookeeper?
It is impossible to use Kafka without Zookeeper because it is not possible to bypass Zookeeper and connect directly to the server. If the Zookeeper is down then we will not able to sever any client request.
6. How to start a Kafka Server?
Kafka uses Zookeeper, we have to start the zookeeper server. One can use the convince script packaged with Kafka with a single node Zookeeper
> bin/zookeeper-server-start.shconfig/zookeeper.properties Now the Kafka server can start> bin/Kafka-server-start.sh config/server.properties