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

Big Data Interview Questions

Questions Answers Views Company eMail

Can we deploy job tracker other than name node?

679

Did you ever ran into a lop sided job that resulted in out of memory error, if yes then how did you handled it ?

442

How many maps are there in a particular job?

458

Can I set the number of reducers to zero?

397

Doesn’t google have its very own version of dfs?

481

What are the restriction to the key and value class ?

433

If we want to copy 10 blocks from one machine to another, but another machine can copy only 8.5 blocks, can the blocks be broken at the time of replication?

665

If datanodes increase, then do we need to upgrade namenode?

464

Which object can be used to get the progress of a particular job

472

Give me examples of unstructured data?

481

Explain the core methods of the reducer?

511

How to handle bad records during parsing?

453

What is the use of context object?

466

What happens if number of reducers are 0?

470

What are the primary phases of the reducer?

459

Un-Answered Questions { Big Data }

Whats the default port that jobtrackers listens ?

479

How does HDFS Index Data blocks? Explain.

Is Namenode machine same as DataNode machine as in terms of hardware?

461

What is the use of spark in big data?

348

What are the features of RDD, that makes RDD an important abstraction of Spark?

280

Define data integrity? How does hdfs ensure data integrity of data blocks stored in hdfs?

Explain the difference between an hdfs block and input split?

What is meant by rdd in spark?

259

What are the different clustering in mahout?

Is there an update statement?

162

Write command to copy a file from HDFS to linux(local).

What is Flume event?

Why spark is faster than hive?

303

What do you mean by the NameNode High Availability in hadoop?

495

what is (HS2) HiveServer2?

681

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