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 /*streamtable(table_name)*/ do?

777

what is (HS2) HiveServer2?

677

Explain how cassandra delete data?

Mention what needs to be taken care while adding a column?

Mention when you can use alter keyspace?

Define memtable?

Explain how cassandra writes data?

Explain what is memtable in cassandra?

Explain cap theorem?

103

What are the Difference between MongoDB and Cassandra?

What is the function of Cluster.Builder class in Cassandra?

139

What is SSTable? How is it different from other relational tables?

118

How does Cassandra write?

Explain the concept of bloom filter?

Explain the concept of Tunable Consistency in Cassandra?

200

Un-Answered Questions { Hadoop }

What is the maximum number of rows in a table?

Clarify what is sequence file input format?

528

There seem to be certain management tools in Cassandra. What are they?

122

What does producer api in kafka?

489

Explain how input and output data format of the hadoop framework?

714

Define replication strategy?

What is the stable version of Hive ?

2629

What is the role of the kafka producer api.

532

Discuss and explain the various types of partitioners in cassandra?

Explain caching in spark streaming.

305

What are broadcast variables in Apache Spark? Why do we need them?

312

What are the features of presto?

What is KeyValueTextInputFormat in Hadoop MapReduce?

804

What are the characteristics of hadoop framework?

668

Is it possible to have hadoop job output in multiple directories?

444

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