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 does conf.setmapper class do?

722

What are ‘maps’ and ‘reduces’?

748

What does a split do?

684

How hadoop mapreduce works?

698

What is shuffling in mapreduce?

658

Can we rename the output file?

739

What do sorting and shuffling do?

750

Explain about the partitioning, shuffle and sort phase

737

What are the four basic parameters of a reducer?

715

what is distributed cache in mapreduce framework?

731

What is the work of hive/hcatalog?

787

What is apache hcatalog?

784

What is hive installation path?

793

What is hive metastore?

755

What is a task tracker?

Un-Answered Questions { Hadoop }

State use cases of impala?

How do I load a big csv file into a partitioned table?

Name the operating system(s) which are supported for production hadoop deployment?

479

Explain the role of offset in kafka?

561

What is a TaskInstance?

714

What are the two main components of ResourceManager?

1197

Explain Erasure Coding in Hadoop?

555

What is cluster in Cassandra data model?

Tell any two feature Flume?

What are combiners? When should I use a combiner in my MapReduce Job?

956

Tell any two features of flume?

116

How will you calculate the number of executors required to do real-time processing using Apache Spark? What factors need to be considered for deciding on the number of nodes for real-time processing?

316

How hadoop mapreduce works?

698

How does impala process join queries for large tables?

Does google use spark?

290

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