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 does map transformation do? Provide an example.

318

What are the different ways of representing data in Spark?

270

What are the features of Spark?

292

What are shared variables in Apache Spark?

329

What are the various libraries available on top of Apache Spark?

314

Explain the operations of Apache Spark RDD?

284

What are the limitations of Apache Spark?

281

State the difference between persist() and cache() functions.

319

What is Directed Acyclic Graph(DAG)?

309

What are Actions? Give some examples.

316

What is the difference between DSM and RDD?

308

What do you mean by Persistence?

318

How to create a Sparse vector from a dense vector?

355

What are common uses of Apache Spark?

299

In a very huge text file, you want to just check if a particular keyword exists. How would you do this using Spark?

404

Un-Answered Questions { Hadoop }

Do streamers make money from sparks?

282

Can you briefly explain the apache mahout?

How can we create children / sub-znode?

Explain about hlog and wal in hbase.

305

Does apache flume support third-party plugins?

Mention key components of Hive Architecture?

862

What is Disk Balancer in Hadoop?

519

What is KeyValueTextInputFormat in Hadoop MapReduce?

815

Why is apache spark so fast?

284

Explain the term 'Log Anatomy'?

549

Explain first() operation in Spark?

348

How do you specify the table creator name when creating a table in hive?

700

what is the difference between order by and sort by in Hive?

709

Does Apache Sqoop have a default database?

What are the advantage of spark?

292

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