Big Data Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Big Data Interview Questions

Questions Answers Views Company eMail

Why rack awareness algorithm is used in hadoop?

Can you change the block size of hdfs files?

What is an identity mapper and identity reducer?

574

What are the advantages of using mapreduce with hadoop?

566

What do you know about nlineinputformat?

651

Why the output of map tasks are stored (spilled ) into local disc and not in hdfs?

635

What is the role of recordreader in hadoop mapreduce?

705

What happens when the node running the map task fails before the map output has been sent to the reducer?

621

Define speculative execution?

687

Is it legal to set the number of reducer task to zero? Where the output will be stored in this case?

624

What are the advantages of using map side join in mapreduce?

617

What is a map side join?

657

What is a combiner and where you should use it?

632

When should you use sequencefileinputformat?

631

What is the purpose of textinputformat?

683

Un-Answered Questions { Big Data }

Explain the difference between mahout & mllib?

What are the abstractions of Apache Spark?

297

Define Node?

197

When should you use sequencefileinputformat?

631

How to use hdfs put command for data transfer from flume to hdfs?

How will you connect Apache Spark with Apache Mesos?

254

Where is the Mapper Output intermediate kay-value data stored ?

1315

What is difference between flume and sqoop?

189

What is the purpose of Sqoop List Tables?

How to change a column data type in Hive?

656

How can you create topic in kafka?

520

Is there any API available for implementing graphs in Spark?

298

What are the commonalities between pig and hive?

551

how can you check whether Namenode is working beside using the jps command?

638

What are the uses and applications of mahout ?

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