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

Can you add or remove Column Families in a working Cluster?

What is CQL?

Define composite type in Cassandra?

What is the best method for Storing Objects in Cassandra ?

Describe Replication Factor?

Define commit log?

What is the difference between Primary, Partition and Cassandra ?

What is the difference between Cassandra and Hadoop ?

What is the Internal Architecture of the Cassandra Database ?

What is the most widely used API Write Data to Cassandra ?

What is keyspace in Cassandra?

What do you understand by Kundera?

What is tunable consistency in Cassandra?

Explain what is Cassandra-Cqlsh?

Define Node?

205

Un-Answered Questions { Hadoop }

What is the role of the offset.

553

Difference between cassandra and mongodb?

Can you explain the common input formats in hadoop?

570

What are the similarities and differences between Apache Flume and Apache Kafka?

107

How can you remove the elements with a key present in any other RDD?

311

Explain data flow in Flume?

103

What is secondary namenode?

What is the difference between scala and spark?

328

What happens if the number of reducers is 0 in Hadoop?

512

What are the various functions of Spark Core?

348

Explain textloader function?

700

What is hotspotting in hbase?

179

What is RDD in Apache Spark? How are they computed in Spark? what are the various ways in which it can create?

340

Explain reduceByKey() Spark operation?

315

how you can improve the throughput of a remote consumer?

648

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