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

Big Data Interview Questions

Questions Answers Views Company eMail

How to add/delete a Node to the existing cluster?

1 582

What is Mapper in Hadoop?

1 614

What is Reducer in Hadoop?

1 609

What are the most common InputFormats in Hadoop?

1 658

Explain InputSplit in Hadoop?

1 510

What is the purpose of RecordReader in hadoop?

1 532

What is Combiner in Hadoop?

1 591

If no custom partitioner is defined in Hadoop then how is data partitioned before it is sent to the reducer?

1 515

Why aggregation cannot be done in Mapper?

1 625

Explain map-only job?

1 570

What is KeyValueTextInputFormat in Hadoop?

1 593

What happen if number of reducer is set to 0 in Hadoop?

1 540

What is TextInputFormat in Hadoop?

1 577

What is purpose of RecordWriter in Hadoop?

1 554

What are the most common OutputFormat in Hadoop?

1 592

Un-Answered Questions { Big Data }

Explain the terms memtable, commitlog and sstables.

How do I know if flume agent is running?

116

How does groupbykey work in spark?

311

What are the important features of hadoop?

495

How does a namenode handle the failure of the data nodes?

743

What is spark shuffle?

284

What is safe mode in Hadoop?

1025

Are there any problems which can only be solved by MapReduce and cannot be solved by PIG? In which kind of scenarios MR jobs will be more useful than PIG?

830

Why are the number of splits equal to the number of maps?

1019

What is single node cluster in Hadoop? for what all purposes Hadoop run on a single node cluster?

587

Is spark good for machine learning?

332

Difference Between Apache Sqoop vs Flume?

Explain about the smb join in hive?

774

How can Flume be used with HBase?

119

Explain what are the tools used in Big Data?

126

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