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 is Distributed Cache?

905

what is difference between pig and sql?

2606

What problem does Apache Pig solve?

801

if you run Hive as a server?

920

What problems have you faced when you are working on Hadoop code?

968

What is HDFS - Hadoop Distributed File System?

962

Are multiline comments supported in Hive?

3284

How does MapReduce framework view its input internally?

868

What is the stable version of Hive ?

2629

What are the most commonly defined input formats in Hadoop?

1058

What does /var/hadoop/pids do?

1264

What is the use of Combiner?

979

What is Hive ?

992

what is SPF?

1509

what are Task Tracker and Job Tracker?

1071

Un-Answered Questions { Hadoop }

How to Alter Hive Database?

743

Give the use of the bootstrap panel.

676

Is spark a mapreduce?

301

How often do you need to reformat the namenode?

511

What do you understand by mapreduce?

647

Is reduce-only job possible in Hadoop MapReduce?

697

Explain about the execution plans of a pig script?
or
differentiate between the logical and physical plan of an apache pig script?

469

What happens when a datanode fails ?

778

What is the difference between Reducer and Combiner in Hadoop MapReduce?

677

What is OutputCommitter?

809

When do you have to avoid secondary indexes?

What is node?

Have you ever used Counters in Hadoop. Give us an example scenario?

1063

What are the different pig data types?

746

What is the use of paging cqlsh command in Cassandra?

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