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.

392

Explain Catalyst framework?

361

What are the downsides of Spark?

356

What is the need for Spark DAG?

309

What is broadcast variable?

369

Why does the picture of Spark come into existence?

312

How can we launch Spark application on YARN?

423

Explain catalyst query optimizer in Apache Spark?

315

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

274

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

282

Is it possible to run Apache Spark on Apache Mesos?

295

What are the different levels of persistence in Spark?

342

What is the default level of parallelism in apache spark?

395

What is Directed Acyclic Graph in Apache Spark?

396

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

275

Un-Answered Questions { Hadoop }

What are the key differences between cassandra and traditional rdbms?

How many types of NoSQL databases are there?

143

Can you join multiple fields in Apache

533

What are the benefits of NoSQL over relational database?

223

What are the tools that are we needed or helps to build ambari?

How does speculative execution work in Hadoop?

441

How to set the number of mappers for a MapReduce job?

693

What are the differences between PIG and SQL?

648

How message is consumed by consumer in kafka?

486

What is the difference between Pig and MapReduce?

614

What is SequenceFileInputFormat in Hadoop MapReduce?

633

How can Flume be used with HBase?

117

Difference Between Apache Sqoop vs Flume?

List the functions of Spark SQL?

483

When should we use SORT BY instead of ORDER BY?

697

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