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

Where do you specify the Mapper Implementation?

1058

What is the meaning of speculative execution in Hadoop? Why is it important?

1088

What is the InputFormat ?

1063

Command to format the NameNode?

984

Who is a 'user' in HDFS?

941

What is the meaning of the term "non-DFS used" in Hadoop web-console?

1350

did you maintain the hadoop cluster in-house or used hadoop in the cloud?

1051

What is DistributedCache and its purpose?

944

What is HDFS ? How it is different from traditional file systems?

948

What is HDFS Block size? How is it different from traditional file system block size?

1 1509

How you can contact your client everyday ?

1009

What is Input Split in hadoop?

1045

What is 'Key value pair' in HDFS?

1008

How to keep HDFS cluster balanced?

1136

What is the port number for NameNode

886

Un-Answered Questions { Hadoop }

What is impala data types?

Name the most common input formats defined in hadoop?

481

Name types of Cluster Managers in Spark.

329

Explain deletion in hbase?

157

Explain what do you understand by cassandra- cql collections?

Why is Apache Spark faster than Hadoop MapReduce?

700

Explain about the execution plans of a Pig Script? Or Differentiate between the logical and physical plan of an Apache Pig script?

648

Explain the different types of repairs.

What is the difference between Cassandra, Pig and Hive?

1046

What is a databricks cluster?

396

What are the primary phases of a Reducer?

877

Compare Pig vs Hive vs Hadoop MapReduce?

716

Does Cassandra work on Windows?

What did mean by data-node?

473

What is a bookie in bookkeeper?

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