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 ‘jps’ command do?

652

Mention what is the use of Context Object?

675

What is commodity hardware?

618

Explain what is sqoop in Hadoop ?

687

Explain how do ‘map’ and ‘reduce’ works?

699

Explain what is the purpose of RecordReader in Hadoop?

710

How to restart Namenode?

707

Suppose Hadoop spawned 100 tasks for a job and one of the task failed. What will Hadoop do?

722

Mention what are the data components used by Hadoop?

626

What does /etc /init.d do?

662

What is a Combiner?

695

Main Components of Hadoop?

726

What are the four characteristics of Big Data?

671

Mention what is the number of default partitioner in Hadoop?

647

Explain what happens in textinformat ?

715

Un-Answered Questions { Hadoop }

What is hdfs spark?

276

If DataNode increases, then do we need to upgrade NameNode?

520

Is kafka part of hadoop?

473

What causes sparks?

283

Explain the term Cluster?

101

What is the difference between RDBMS with Hadoop MapReduce?

776

What is a task instance in hadoop? Where does it run?

587

what are views in Hive?

716

If the hadoop administrator needs to make a change, which configuration file does he need to change?

410

How do you list all databases whose name starts with p?

640

Define the common faults of the developer while using apache spark?

276

What is flatmap?

301

Explain the term 'Topic Replication Factor'?

498

What is kafka technology?

483

What is Apache Avro?

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