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

When to use spark sql?

311

What are the great features of spark sql?

292

Can you explain apache spark?

322

What is apache presto?

Describe REVERSE function in Hive with example?

721

How to Alter Hive Database?

755

When application is on high latency (high response time)?

799

CONCAT function in Hive with Example?

830

Is it possible to create multiple table in hive for same data?

695

UPPER or UCASE function in Hive with example?

808

What is CTAS Table in Hive?

751

How do you write your own custom SerDe ?

747

How will you read and write HDFS files in Hive?

706

Explain ALTER Table statement in Hive?

719

LOWER or LCASE function in Hive with example?

713

Un-Answered Questions { Hadoop }

What is spark machine learning?

258

What happens when a datanode fails ?

787

What are the relational operators available related to combining and splitting in pig language?

719

What is replication in kafka?

516

What is spark driver application?

271

Explain the different logging levels in cassandra.

What is the most widely recognized info formats characterized in hadoop?

448

What is the role of CQLSH?

What are the various functions of Spark Core?

332

Mention what job does the conf class do?

431

What type of data hadoop can handle ?

433

What is Fault Tolerance?

540

Why is spark used?

273

What is the Reducer used for?

934

What is spark repartition?

314

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