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

Explain the concept of resilient distributed dataset (rdd).

2055

What do you understand by schemardd in apache spark rdd?

2279

What are roles in cqlsh?

what is gossip protocol?

What are snapshots and how do you create one in cassandra?

What is the use of coordinator node in read?

Explain the different logging levels in cassandra.

What are clusters in cassandra?

What is network topology strategy?

How is a keyspace created in cassandra? & What are the parameters used?

What is graph db?

How is a keyspace created in cassandra?

124

What is cqlsh? And why is it used?

What is document store db? Explain with an example.

What is a nosql database?

Un-Answered Questions { Hadoop }

What are accumulators in Apache Spark?

318

What are the Benefits Of Distributed Applications?

Define speculative execution?

722

What are the majorly used commands in sqoop?

What is the use of context object?

466

How the HDFS Blocks are replicated?

973

How does gossip protocol work?

What is column families? What happens if you alter the block size of ColumnFamily on an already populated database?

1107

What does job conf class do?

674

What is flume and sqoop?

107

Do we need hadoop for spark?

297

What are different hdfs dfs shell commands to perform copy operation?

1062

What is spark context spark session?

285

What is the meaning of the term "non-DFS used" in Hadoop web-console?

1310

What is hadoop, hbase, hive and cassandra? Specify similarities and differences among them.

127

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