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 is isr?

556

When does the queue full exception emerge inside the manufacturer?

510

Why apache kafka?

613

What happens if the preferred replica is not in the isr?

587

What is kafka logs?

585

What is kafka topic?

552

How message is consumed by consumer in kafka?

488

What are the relational databases supported in sqoop?

Use of import-all-tables command in hadoop sqoop?

Use of create-hive-table command in hadoop sqoop?

Use of list-tables command in hadoop sqoop?

Use of eval command in hadoop sqoop?

Use of list-databases command in hadoop sqoop?

What are the majorly used commands in sqoop?

Use of export command in hadoop sqoop?

Un-Answered Questions { Hadoop }

What are the disadvantages of hadoop serialization?

what is the Hadoop MapReduce APIs contract for a key and value class?

675

What is the difference between Pig and SQL?

646

Can multiple clients write into an HDFS file concurrently in hadoop?

List the popular use cases of Apache Spark?

292

What is the difference between a node, a cluster, and data centre?

255

Can you explain worker node?

403

Can you explain difference between apache mahout and apache spark’s mllib?

What is MapFile?

972

Can ambari manage multiple clusters and why?

What is HBase?

362

What are the transformations in spark?

287

What is kerberos secured cluster in apache pig?

713

What is spark accreditation?

278

Why the name ‘hadoop’?

621

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