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?

385

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 ?

286

Un-Answered Questions { Hadoop }

What are the common types of NOSQL data bases ?

483

What do you understand by receivers in Spark Streaming ?

338

How to create the directory when name node is in safe mode?

607

Explain HCatWriter?

What if rack 2 and datanode fails?

1105

How HDFS helps NameNode in scaling in Hadoop?

What is heap memory in spark?

281

Mention what is the difference between Hbase and Hive?

745

Explain the rudimentary difference between Cassandra and HBase?

Explain apache kafka?

563

how can we change Replication Factor?

1075

Can you define the process of creating ambari client?

When to choose "Internal Table" in Hive?

761

How many partitions are created by default in Apache Spark RDD?

319

Can you explain about the indexing process in hdfs?

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