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 the job tracker role in hadoop?

426

Explain how do you overwrite replication factor?

433

Explain how can we check whether namenode is working or not?

570

Define a udf?

416

Define a sequence file in hadoop?

538

Name the operating system(s) which are supported for production hadoop deployment?

437

Explain in which directory hadoop is installed?

469

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

437

Explain the difference between an inputsplit and a block?

427

What is the use of cloudera?

448

Explain about the indexing process in hdfs?

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

Replication causes data redundancy then why is pursued in hdfs?

Since the data is replicated thrice in hdfs, does it mean that any calculation done on one node will also be replicated on the other two?

If a particular file is 50 mb, will the hdfs block still consume 64 mb as the default size?

Un-Answered Questions { Big Data }

Explain the features of Apache Spark because of which it is superior to Apache MapReduce?

618

What is data skew in spark?

299

Name some features of Apache Cassandra?

Can I set the number of reducers to zero?

397

Explain HCatOutputFormat?

Explain is it possible to search for files using wildcards?

478

What are 5 vs of big data ?

537

Is impala production ready?

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

604

Why do we need a password-less ssh in fully distributed environment?

709

What does serdes mean in apache kafka?

598

Explain cogroup() operation in Spark?

287

What is aws spark?

273

name few other popular column oriented databases like hbase.

203

How analysis of Big Data is useful for organizations?

460

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