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 what you understand by speculative execution

665

Explain combiners.

679

when do reducers play their role in a mapreduce task?

658

In mapreduce what is a scarce system resource? Explain?

719

What do you understand by mapreduce?

699

Explain how mapreduce works.

672

What is an input reader in reference to mapreduce?

663

How is mapreduce related to cloud computing?

711

Define the purpose of the partition function in mapreduce framework

718

What are the various input and output types supported by mapreduce?

684

Explain task granularity

698

Explain the general mapreduce algorithm

702

What is cassandra database used for?

List out some key features of apache cassandra?

What do you understand by bloom filter in cassandra?

101

Un-Answered Questions { Hadoop }

What is NameNode and DataNode in HDFS?

Elaborate on cassandra - cql?

Can we change the file cached by distributed cache

469

what is hadoop archive?

969

Explain InputSplit in Hadoop?

502

Explain what is cassandra?

What are the different parts of Hive ?

822

How can we see all the hosts that are available in Ambari?

How do I know if flume agent is running?

116

what is gossip protocol?

What do you understand by standalone (or local) mode?

473

What does reduce action do?

293

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

1771

What is the need of key-value pair to process the data in MapReduce?

718

how will you implement SQL in Spark?

395

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