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?

661

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

707

Explain what does the conf.setmapper class do?

671

Explain what are the basic parameters of a mapper?

869

Mention what is the next step after mapper or maptask?

700

Explain what is shuffling in mapreduce?

677

Explain what is distributed cache in mapreduce framework?

677

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

787

Explain what is the function of mapreduce partitioner?

688

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 }

How does impala achieve its performance improvements?

Name some internal daemons used in spark?

379

How does hdfs ensure information integrity of data blocks squares kept in hdfs?

Can the name of a view be same as the name of a hive table?

810

what is next step after mapper or maptask?

462

What is the future of Big Data trend?

678

Does google use hadoop?

728

How multi-hop agent can be setup in Flume?

110

What are the actions followed by hadoop?

512

Where is the output of Mapper written in Hadoop?

851

Can you explain data versioning?

174

What is the role of a MapReduce partitioner?

865

Who developed Apache Avro?

What is distinct clause in apache tajo?

Why do I have to use refresh and invalidate metadata, what do they do?

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