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?

694

Mention what is the use of Context Object?

721

What is commodity hardware?

659

Explain what is sqoop in Hadoop ?

725

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

736

Explain what is the purpose of RecordReader in Hadoop?

745

How to restart Namenode?

747

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

762

Mention what are the data components used by Hadoop?

659

What does /etc /init.d do?

700

What is a Combiner?

740

Main Components of Hadoop?

769

What are the four characteristics of Big Data?

715

Mention what is the number of default partitioner in Hadoop?

694

Explain what happens in textinformat ?

748

Un-Answered Questions { Hadoop }

Is kafka open source?

502

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

482

What is the difference between hbase and hdfs?

171

How Hive distributes the rows into buckets?

802

What are partitions and tokens in cassandra?

Is the hdfs block size reduced to achieve faster query results?

What is distinct clause in apache tajo?

Explain Spark SQL caching and uncaching?

331

How do you stop a spark?

281

What is kafka Producer?

529

Why should we use ‘orderby’ keyword in pig scripts?

528

How the Client communicates with HDFS?

1063

How do I stop flume agent?

What is the role of Connector API?

553

What is pig latin statements?

512

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