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 are Pig Execution modes?

670

What is bag data type in Pig?

719

How to load data in pig?

645

What are the Optimizations a developer can use during joins?

569

Why should we use ‘orderby’ keyword in pig scripts?

576

What are the different math functions available in Pig?

555

What is Pig Latin?

635

Tell me about the execution modes of Apache Pig?

574

What is a tuple?

2 1264

Why should we use ‘distinct’ keyword in Pig scripts?

574

What are the different Eval functions available in Pig?

593

What are the scalar data types in Pig?

632

State the limitations of Apache Pig?

645

Why we use BloomMapFile?

647

What is a skewed join?

641

Un-Answered Questions { Hadoop }

What are the types of tables in Hive?

780

What is the use of context object?

504

How many instances of a jobtracker run on hadoop cluster?

684

Explain first() operation in Spark?

366

how Cassandra writes data?

130

On what basis data will be stored on a rack?

1178

What are benefits of DataFrame in Spark?

343

Describe join() operation. How is outer join supported?

304

What is fluming?

161

What happens to a namenode, when job tracker is down?

788

Mention Hive default read and write classes?

796

What are sink processors?

948

How does cassandra perform read operation? Explain

Explain what are the tools used in Big Data?

126

What does hadoop-env.sh do?

483

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