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 conf.setmapper class do?

722

What are ‘maps’ and ‘reduces’?

748

What does a split do?

684

How hadoop mapreduce works?

698

What is shuffling in mapreduce?

658

Can we rename the output file?

739

What do sorting and shuffling do?

750

Explain about the partitioning, shuffle and sort phase

737

What are the four basic parameters of a reducer?

715

what is distributed cache in mapreduce framework?

731

What is the work of hive/hcatalog?

787

What is apache hcatalog?

784

What is hive installation path?

793

What is hive metastore?

755

What is a task tracker?

Un-Answered Questions { Hadoop }

Distinguish HDFS Block and Input Unit?

What is active and passive NameNode in Hadoop?

506

What is the default database provided by Apache Hive for metastore?

683

What is spark dynamic allocation?

332

How does one create RDDs in Spark?

298

What is the syntax of describe Command?

314

How are sparks created?

309

Why would nosql be better than using a sql database? And how much better is it?

522

How do you stop a spark?

303

Explain the lookup() operation in Spark?

245

Can you define parquet file?

298

How tasks are created in spark?

299

Is databricks an etl tool?

305

How does inputsplit in mapreduce determines the record boundaries correctly?

693

What is Spark Core?

321

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