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 is NameNode? How NameNode tackle Datanode failures in Hadoop?

468

How often DataNode send heartbeat to NameNode in Hadoop?

536

What is Mapper? How can we compress Mapper output in Hadoop?

519

What is Rack Awareness? What is its need in Hadoop?

532

What is Erasure Coding in Hadoop?

506

Why do we need Hadoop Archives? How is it created?

563

What is Slot in Hadoop v1? Why was it removed from Hadoop v2?

515

What is CAP Theorem? What aspects does Hadoop support from this theorem?

473

Why do we need Hadoop?

520

What are the core components of Hadoop?

508

What are the Features of Hadoop?

511

Compare Hadoop and RDBMS?

410

What are the modes in which Hadoop run?

504

What are the features of Standalone (local) mode?

596

What are the features of Pseudo mode?

503

Un-Answered Questions { Big Data }

What is shuffling in mapreduce?

607

How to start a kafka server?

610

What combiners are and when you should utilize a combiner in a map reduce job?

604

Is it possible to leverage real time analysis on the big data collected by flume directly? If yes, then explain how?

What is zookeeper in hadoop?

647

What are the differences between relational databases and impala?

What are the two main parts of the hadoop framework?

669

Explain the process that overwrites the replication factors in HDFS?

Define catalog tables in HBase?

215

Is Mapreduce Required For Impala? Will Impala Continue To Work As Expected If Mapreduce Is Stopped?

677

Explain how can you minimize data transfers when working with spark?

436

What is winutils hadoop?

430

What are the areas where ambari helps the system administrators to do?

Mention the difference between hbase and relational database?

162

What is decorating filters?

301

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