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

Big Data Interview Questions

Questions Answers Views Company eMail

What combiners are and when you should use a combiner in a mapreduce job?

597

Explain what is “map” and what is "reducer" in hadoop?

642

Explain what does the conf.setmapper class do?

609

Explain what are the basic parameters of a mapper?

802

Mention what is the next step after mapper or maptask?

629

Explain what is shuffling in mapreduce?

625

Explain what is distributed cache in mapreduce framework?

615

Mention what are the main configuration parameters that user need to specify to run mapreduce job?

729

Explain what is the function of mapreduce partitioner?

638

Explain what is heartbeat in hdfs?

Explain what is a difference between an input split and hdfs block?

Explain how indexing in hdfs is done?

Mention what is the best way to copy files between hdfs clusters?

Mention what is the difference between hdfs and nas?

What is a difference between an input split and hdfs block?

Un-Answered Questions { Big Data }

What is kafka?

549

Can you explain sqoop metastore?

In MapReduce how to change the name of the output file from part-r-00000?

625

Explain Avro Schemas?

When NameNode enter in Safe Mode?

Why ‘Reading‘ is done in parallel and ‘Writing‘ is not in HDFS?

Give examples of the SerDe classes which hive uses to Serialize and Deserialize data?

700

Does spark need hdfs?

291

Mention some instances where zookeeper is using?

Why do we need a new framework for handling big data?

629

List of some best tools that can be useful for data-analysis?

431

What is the difference between Primary, Partition and Cassandra ?

Which laptop is best for big data?

536

Clarify how job tracker schedules an assignment?

419

Name the various types of lists supported by bootstrap.

677

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