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 load do concurrent queries produce on the namenode?

How can it help for avoiding costly modeling?

What is the use of expand cqlsh command in Cassandra?

What is Kundera in Cassandra?

What are the consistency levels for read operations in Cassandra?

105

How the read operation is performed on Cassandra node ?

104

How the write operation is performed on Cassandra node ?

100

What is the difference between Column and SuperColumn?

152

What do you mean by Thrift in Cassandra?

What are components of Cassandra Data Model?

In which language Cassandra is written?

What is the difference between a node, a cluster, and data centre?

265

What are the main components of Cassandra data models?

119

What are the other components of Cassandra?

What is Cassandra-Cqlsh?

131

Un-Answered Questions { Hadoop }

Which is the best hadoop certification?

714

What is hdfs block size?

Can you explain sequence file in hadoop?

453

What happens when two clients try to access the same file on HDFS?

197

Define a namenode?

708

What is write ahead log(journaling)?

321

What is the latest version of spark?

287

What is an "Accumulator"?

296

What does map transformation do? Provide an example.

332

What is Nagios?

228

What are types of hive built-in functions?

779

Are multiline comments supported in Hive?

3340

What is configured in /etc/hosts and what is its role in setting Hadoop cluster?

585

HCatalog helps to Integrate Hadoop with everything. Explain?

Is it necessary to write a mapreduce job in java?

671

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