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

What happens if the quantity of the reducer is 0 in mapreduce?

594

Clarify what combiners are and when you should utilize a combiner in a map reduce job?

593

Clarify what is shuffling in map reduce?

634

What are the fundamental configurations parameters specified in map reduce?

635

What combiners are and when you should utilize a combiner in a map reduce job?

604

What are the four essential parameters of a mapper?

653

What does rack awareness mean?

411

What the information segments utilized by hadoop are?

417

Clarify what a task tracker is in hadoop?

427

How ordering in hdfs is finished?

424

Clarify what is sequence file input format?

528

How job tracker schedules an assignment?

412

Clarify what jobtracker is in hadoop? What are the activities followed by hadoop?

428

What is the most widely recognized info formats characterized in hadoop?

431

Clarify what webdav is in hadoop?

471

Un-Answered Questions { Hadoop }

What is log compaction?

530

Hbase blocksize is configured on which level?

166

when to choose “internal table” and “external table” in hive?

677

What is the difference between hbase and hdfs?

171

What does ambari shell can provide?

What is anti-entropy?

What is the difference between map and reduce?

627

What is impala’s aggregation strategy?

Explain the general mapreduce algorithm

647

How to restart NameNode or all the daemons in Hadoop?

542

Explain what is namenode in hadoop?

438

What is Row Key?

981

Explain when using field grouping in storm, is there any time-out or limit to known field values?

588

What do you understand by nosql cap theorem?

What are the usage of different consistency levels for write operations ?

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