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

Apache Hadoop (394)
MapReduce (354)
Apache Hive (345)
Apache Pig (225)

Apache Ambari (93)
Apache HCatalog (34)
Apache HDFS Hadoop Distributed File System (214)
Apache Kafka (189)

Hadoop Interview Questions

Questions Answers Views Company eMail

What is hadoop technology?

317

What is a pipelinedrdd?

450

What is flatmap?

324

What is pipelined rdd?

267

What is the difference between rdd and dataframe?

349

What is flatmap in angular?

343

Which storage level does the cache () function use?

315

What is difference between coalesce and repartition?

377

What is sc parallelize?

372

What is sc textfile?

351

What is difference between map and flatmap?

306

What is difference between map and flatmap in spark?

340

What is the use of flatmap in spark?

302

Does kafka use hdfs?

527

Is kafka big data?

513

Un-Answered Questions { Hadoop }

What do you understand by column family?

100

What is the procedure to create users in HDFS and how to allocate Quota to them?

What do you understand by standalone (or local) mode?

473

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

660

Can the region server will be located on all datanodes?

324

What is wal and hlog in hbase?

317

What is the default database provided by Apache Hive for metastore?

681

how Cassandra delete Data?

114

What are the core benefits for hadoop users by using apache ambari?

Mention some important components of cassandra data models?

What is Sqoop Import? Explain its purpose?

Define Actions.

317

What is Mapper in Hadoop MapReduce?

784

What happens when the data set exceeds available memory?

On which port does ssh work?

790

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