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

Define Cassandra?

What are the parameters used to create a keyspace?

112

Describe Network Topology Strategy?

132

Give the difference between Drop and Truncate in CQLSH?

How can a user get the information on the version of CQLSH?

Define Simple Strategy?

128

Give a list of Collection data type in Cassandra?

Describe JMX?

How can a user create a Keyspace in Cassandra?

Define primary key in Apache Cassandra?

Define Thrift in Apache Cassandra?

Name different types of the data model?

Give the difference between Column and SuperColumn?

143

Define durable writes?

Define Compaction?

Un-Answered Questions { Hadoop }

Explain a simple Map/Reduce problem.

719

What are the various uses of explode hive?

678

What if a namenode has no data?

667

What do you mean by column family in Cassandra?

Explain jsonloader, jsonstorage functions in pig?

583

how can we access the sub directories recursively?

792

List the advantage of Parquet file in Apache Spark?

457

What is driver memory and executor memory in spark?

326

Is apache spark a tool?

270

What is the communication channel between client and namenode/datanode?

1734

Define Nodetool Utility?

Hadoop uses replication to achieve fault tolerance. How is this achieved in Apache Spark?

408

What's rdd?

284

Why HCatalog?

Explain the default level of parallelism in Apache Spark

312

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