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

How to change a column data type in Hive?

689

How Facebook Uses Hadoop, Hive and Hbase ?

707

Mention what is HiveServer2 (HS2)?

793

What are the different IDE available for Hive Development?

702

Is Hive useful when making data warehouse applications?

738

Explain REVERSE function in Hive with example?

767

What kind of datawarehouse application is suitable for Hive?

689

Explain REPEAT function in Hive with example?

808

What does the "USE" command in hive do?

793

Can you give us some examples, how Hadoop is used in real time environment?

703

What is Apache Spark?

369

explain the key features of Apache Spark?

336

How is Apache Spark better than Hadoop?

300

Explain the term paired RDD in Apache Spark?

403

How is RDD in Spark different from Distributed Storage Management?

380

Un-Answered Questions { Hadoop }

How to create RDD?

497

Explain the flatMap operation on Apache Spark RDD?

318

What is presto?

Explain how cassandra writes changed data into commitlog?

What is Hadoop Map Reduce ?

805

What is inputsplit in hadoop? Explain.

790

Which scala library is used for functional programming?

465

How can multi-hop agent be set up in Flume?

118

List the relational operators in pig.

629

Explain the operations of Apache Spark RDD?

283

Explain various level of persistence in Apache Spark?

302

When to use explode in Hive?

750

Explain what is Hive?

708

Explain edge nodes in hadoop?

441

Hadoop achieves parallelism by dividing the tasks across many nodes, it is possible for a few slow nodes to rate-limit the rest of the program and slow down the program. What mechanism Hadoop provides to combat this?

456

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