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

Is kafka an etl tool?

463

What language is apache kafka written in?

535

What is zookeeper server?

What is the difference between map and reduce?

634

What is optimal size of a file for distributed cache?

636

What can skew the mean?

282

What is vectorized query execution?

317

What is map side join?

306

What does dag stand for?

295

What is data ingestion pipeline?

321

What is the difference between reducebykey and groupbykey?

295

What is data skew and how do you fix it?

332

Is databricks a database?

316

Is databricks an etl tool?

289

What is a databricks cluster?

381

Un-Answered Questions { Hadoop }

Which command is used to run hbase shell?

174

How is spark fault tolerance?

399

How do I check my spark status?

276

when you can use Alter keyspace?

123

What combiners is and when you should use a combiner in a MapReduce Job?

626

Mention what does the text input format do?

419

How to specify more than one path for storage in Hadoop?

509

What is Combiner in Hadoop?

535

What is the function of UNION and SPLIT operators? Give examples?

537

Why does my select statement fail?

What is the reason behind Transformation being a lazy operation in Apache Spark RDD? How is it useful?

482

what happens in textinformat ?

673

What is the difference between input split and hdfs block?

Name the filter which accepts the page size as the parameter in hbase?

184

Can you explain broadcast variables?

295

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