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

Apache Hadoop (394)
MapReduce (354)
Apache Hive (345)
Apache Pig (225)

Apache Ambari (93)
Apache HCatalog (34)
Apache HDFS Hadoop Distributed File System (214)
Apache Kafka (189)

Hadoop Interview Questions

Questions Answers Views Company eMail

How can we assure that the values regarding a particular key goes to the same reducer?

660

What is pig statistics?

566

List the relational operators in pig.

673

What are all stats classes in the java api package available?

601

List the diagnostic operators in pig.

631

Why do we need indexing?

750

What will happen in case you have not issued the command: ‘set hive.enforce.bucketing=true;’ before bucketing a table in hive in apache hive 0.x or 1.x?

822

What is hbase fsck?

218

What are different tombstone markers in hbase?

159

What is the use of get() method?

158

Can you explain data versioning?

174

How will you design or modify schema in hbase programmatically?

159

What happens when you issue a delete command in hbase?

170

What is a bloom filter and how does it help in searching rows?

177

Hbase blocksize is configured on which level?

168

Un-Answered Questions { Hadoop }

Explain HBase Architecture in brief?

210

How namenode handles data node failures?

567

Can we deploy job tracker other than name node?

721

What are the different types of filaters used in hbase?

195

What is the problem with small files in Hadoop?

567

Is spark difficult to learn?

323

Does if offer scaling?

What are the advantages of kafka?

625

What do you mean by Persistence?

330

Explain avrostorage function?

666

Define streaming access?

708

What happen if a datanode loses network connection for a few minutes?

643

How is HDFS fault tolerant?

1077

Can you define a checkpoint?

523

What is a keyspace in Cassandra?

107

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