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 the input type/format in mapreduce by default?

585

What is difference the between sqoop and distcp?

Can you explain edge nodes in hadoop?

440

Explain some important features of hadoop?

450

Why do we need hadoop for big data analytics?

437

What are the important modes of hadoop?

538

Can you explain the common input formats in hadoop?

529

Explain how are file systems checked in hdfs?

What are the different catalog tables in hbase?

172

Explain edge nodes in hadoop?

448

What are the important features of hadoop?

445

Explain the common input formats in hadoop?

471

How are file systems checked in hdfs?

What is cassandra used for?

Can hadoop replace relational database?

431

Un-Answered Questions { Hadoop }

What are the different Eval functions available in Pig?

563

What are benefits of DataFrame in Spark?

328

What is a 'block' in HDFS?

977

Web-ui shows that half of the datanodes are in decommissioning mode. What does that mean? Is it safe to remove those nodes from the network?

446

How do I check my spark status?

276

Clarify how job tracker schedules an assignment?

421

Specify Cassandra’s importance on Facebook?

153

What is the difference between Gen1 and Gen2 Hadoop with regards to the Namenode?

1174

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

455

What is Data Log in Kafka?

812

What is the difference between rdd and dataframe?

341

What are "coordinator nodes" in cassandra?

Is it possible to use the same metastore by multiple users, in case of the embedded hive?

806

Mention some basic tajo shell commands?

What is an offset?

508

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