The Best Apache Kafka Interview Questions [UPDATED] 2018

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4/9/2018 The Best Apache Kafka Interview Questions UPDATED 2018 https://www.instapaper.com/read/1040738301 1/11 The Best Apache Kaa Interview Questions UPDATED 2018 mindmajix.com https:/ /mindmajix.com/ apache-kaa-interview-questions · by Apache Kaa Questions Interview Questions on Apache Kaa. Apache Kaa Interview Questions 5.0 Email This Post If youre looking for Apache Kaa Interview Questions for Experienced or Freshers you are at right place. There are lot of opportunities from many reputed companies in the world. According to research Apache Kaa has a market share of about 9.1. So You still have opportunity to move ahead in your career in Apache Kaa Engineering. Mindmajix offers Advanced Apache Kaa Interview Questions 2018 that helps you in cracking your interview acquire dream career as Apache Kaa Engineer. Are you interested in taking up for Apache Kaa Certification Training Enroll for Free Demo on Apache Kaa Training https:/ /mindmajix.com/ apache-kaa-training Q: Explain what is Kaa Kaa 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 Kaa is mainly based on the transactional logs design.

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4/9/2018 The Best Apache Kafka Interview Questions UPDATED 2018 https://www.instapaper.com/read/1040738301 2/11 Q: What are the different components that are available in Kaa The different components that are available in Kaa 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 Kaa 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. Q: What is a consumer group A consumer group is nothing but an exclusive concept of Kaa. Within each and every Kaa consumer group we will have one or more consumers who actually consume subscribed topics. Q: Explain the role of the zookeeper in Kaa Within the Kaa 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 Kaa without the zookeeper No it is not possible to use Kaa without the zookeeper. The user will not able to connect directly to the Kaa 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.

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4/9/2018 The Best Apache Kafka Interview Questions UPDATED 2018 https://www.instapaper.com/read/1040738301 3/11 Q: Elaborate on the terms leader and follower in Kaa environment The concept of leader and follower is maintained in Kaa environment so that the overall system ensures load balancing on the servers. For every partition in Kaa environment one server plays the role as leader and rest of the servers act as followers. All the data read and write commands are executed at the leader level and rest of the followers just have to replicate the process. At the time of any server faults and the leader is not able to function appropriately then one of the followers will take the place of the leaders. Thus making the system stable and also helps in load balancing of the server. Q: What does ISR stand in Kaa 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 doesnt matter whether they actually play a role of a leader or not. Q: Why are the replications are considered critical in Kaa 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. Q: If the replica stays out of the ISR for very long time then what does it tell us If the replica stays out of the ISR for very long time or replica is not in synch with

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4/9/2018 The Best Apache Kafka Interview Questions UPDATED 2018 https://www.instapaper.com/read/1040738301 4/11 the ISR then it means that the follower server is not able to grasp data as fast the leader is doing. So basically the follower is not able to come up with the leader activities. Q: What is the process of starting a Kaa server As the Kaa environment is run on zookeeper one has to make sure to run zookeeper server first and then ignite Kaa server. Q: Explain what is a partitioning key Within the available producer the main function of partitioning key is to validate and direct the destination partition of the message. Normally a hashing based partitioner is used to assess the partition Id if the key is provided. Q: Within the producer can you explain when will you experience QueueFullException occur Well if the producer is sending more messages to the broker and if it cannot handle this in the flow of the messages then we will experience QueueFullException. The producers dont have any limitation so it doesnt know when to stop the overflow of the messages. So to overcome this problem one should add multiple brokers so that the flow of the messages can be handled perfectly and we wont fall into this exception again. Q: Define the role of Kaa producer API Kaa procedure API aims to do the producer functionality through one API call to the client. In specific Kaa producer API actually combines the efforts of kaa.producer.SyncProducer and the kaa.producer.async.Async Producer

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4/9/2018 The Best Apache Kafka Interview Questions UPDATED 2018 https://www.instapaper.com/read/1040738301 5/11 Q: Explain the main difference between Kaa and Flume Both Kaa and Flume are used for real-time processing where Kaa seems to be more scalable and you can trust on the message durability. Check Out Apache Kaa Tutorials https:/ /mindmajix.com/ apache-kaa Q: Explain the Kaa architecture Kaa is nothing but a cluster which holds multiple brokers as it is called as a distributed system. The topics within the system will hold multiple partitions. Every broker within the system will hold multiple partitions. Based on this the producers and consumers actually exchange the message at the same time and the overall execution happens seamlessly. Q: What are the advantages of Kaa technology The following are the advantages of using Kaa 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 Kaa is a distributed streaming platform if yes what you can do with it Yes apache Kaa 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

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4/9/2018 The Best Apache Kafka Interview Questions UPDATED 2018 https://www.instapaper.com/read/1040738301 6/11 Q: What can you do with Kaa With the help of Kaa 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 Kaa 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. Q: Explain the functionality of producer API in Kaa The producer API is responsible where it will allow the application to push a stream of records to one of the Kaa topics. Q: Explain the functionality of Consumer API in Kaa 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 Kaa 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 Kaa 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.

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4/9/2018 The Best Apache Kafka Interview Questions UPDATED 2018 https://www.instapaper.com/read/1040738301 7/11 For this to happen we will be using reusable producers and consumers which stays connected to the Kaa topics. Q: Explain what is a topic A topic is nothing but a category classification or it can be a feed name out of which the records are actually published. Topics are always classified the multi subscriber. Q: What is the purpose of retention period in Kaa cluster Within the Kaa cluster it retains all the published records. It doesn’t check whether they have been consumed or not. Using a configuration setting for the retention period the records can be discarded. The main reason to discard the records from the Kaa cluster is that it can free up some space. Q: Highlights of Kaa system 1. It is dedicated to high performance 2. Low latency system 3. Scalable storage system Q: What are the main components where the data is processed seamlessly in Kaa The main components where the data is processed seamlessly is: 1. Producers 2. Consumers Q: Is apache Kaa is an open source stream processing platform Yes apache Kaa is an open source stream processing platform. Explore Apache Kaa Sample Resumes Download Edit Get Noticed by Top EmployersDownload Now https:/ /mindmajix.com/ apache-kaa- sample-resumes

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