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

Explain the difference between Spark SQL and Hive.

402

Explain Catalyst framework?

373

What are the downsides of Spark?

375

What is the need for Spark DAG?

319

What is broadcast variable?

384

Why does the picture of Spark come into existence?

324

How can we launch Spark application on YARN?

444

Explain catalyst query optimizer in Apache Spark?

327

What are the various modes in which Spark runs on YARN? (Local vs Client vs Cluster Mode)

289

Apache Spark is a good fit for which type of machine learning techniques?

298

Is it possible to run Apache Spark on Apache Mesos?

307

What are the different levels of persistence in Spark?

348

What is the default level of parallelism in apache spark?

411

What is Directed Acyclic Graph in Apache Spark?

421

What according to you is a common mistake apache spark developers make when using spark ?

285

Un-Answered Questions { Hadoop }

Describe Replication Factor?

Explain the difference between NameNode

974

What is pseudo-distributed mode?

648

What is the method to create a data frame?

328

How Cassandra stores data?

What relational operators can we use that are related to combining and splitting in Pig language?

592

Define column families?

178

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

748

Differentiate between describe and describe extended?

743

How Apache Pig deals with the schema and schema-less data?

619

Can you explain data versioning?

174

Explain SparkContext in Apache Spark?

344

Which scala library is used for functional programming?

493

What is meant by in-memory processing in Spark?

323

What are hive operators and its types?

793

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