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?

567

List the relational operators in pig.

673

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

603

List the diagnostic operators in pig.

634

Why do we need indexing?

752

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?

824

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 }

What is the main purpose of HDFS fsck command?

1852

What is UDF in Pig?

692

How does gossip protocol work?

What is spark certification?

326

What is pagerank?

300

Can you modify the file present in hdfs?

What are the Optimizations a developer can use during joins?

570

How to explain Bigdatadeveloper projects

604

how is a file of the size 1 GB uncompressed

962

Compare hbase vs hdfs?

What is the function of ApplicationMaster?

1017

What are ‘maps’ and ‘reduces’?

746

What is Client API?

287

When is it not recommended to use MapReduce paradigm for large scale data processing?

729

Why is BlinkDB used?

312

For More Un-Answered { Hadoop } Questions Click Here