Big Data Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Big Data Interview Questions

Questions Answers Views Company eMail

What is Hadoop Map Reduce ?

863

what does the text input format do?

872

What happens when a datanode fails ?

843

In Hadoop, which file controls reporting in Hadoop?

834

how can you debug Hadoop code?

907

For a job in Hadoop, is it possible to change the number of mappers to be created?

838

What are the primary phases of a Reducer?

892

how indexing in HDFS is done?

903

What is the role of a MapReduce partitioner?

872

Is it important for Hadoop MapReduce jobs to be written in Java?

904

what job does the conf class do?

849

What is the key- value pair in Hadoop MapReduce?

746

What is InputFormat in Hadoop MapReduce?

733

What are the various InputFormats in Hadoop?

706

Explain InputSplit in Hadoop MapReduce?

734

Un-Answered Questions { Big Data }

What is spark deploy mode?

325

Explain the terms Spark Partitions and Partitioners?

314

Explain how does hbase actually delete a row?

171

Can you explain recommendation engine?

What are the three components of Cassandra write?

122

What is a map side join?

739

Is kafka an etl tool?

517

Hadoop achieves parallelism by dividing the tasks across many nodes, it is possible for a few slow nodes to rate-limit the rest of the program and slow down the program. What mechanism Hadoop provides to combat this?

509

How data or file is written into Hadoop HDFS?

Is hadoop a memory?

742

Explain Catalyst framework?

373

What do you mean by tunable consistency?

102

What is the role of the ZooKeeper in Kafka?

572

What is the problem with small files in Hadoop?

579

What is rdd partition?

334

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