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 can you set an arbitrary number of Reducers to be created for a job in Hadoop?

507

Give examples of some companies that are using Hadoop structure?

474

Which modes can Hadoop be run in? List a few features for each mode?

506

How analysis of Big Data is useful for organizations?

528

What does the file hadoop-metrics.properties do?

532

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?

499

How will you write a custom partitioner for a Hadoop job?

498

Give me the examples of Columnar database ?

625

What are 'slaves' and 'masters' in Hadoop?

475

What is Fault Tolerance?

566

What is the basic difference between traditional RDBMS and Hadoop?

481

What are the common types of NOSQL data bases ?

481

Is it possible to provide multiple input to Hadoop? If yes then how can you give multiple directories as input to the Hadoop job?

469

How does speculative execution work in Hadoop?

482

What is Federation?

461

Un-Answered Questions { Hadoop }

What happens when you issue a delete command in hbase?

170

What Is Difference Between Mapreduce and Pig ?

677

what is Speculative Execution?

890

What is Disk Balancer in Apache Hadoop?

951

What exactly kafka does?

528

Can you explain smb join in hive?

776

What is Apache Hadoop YARN?

1499

State some advantages of impala?

How hbase handles the write failure?

208

Explain why do we need hadoop?

714

explain the concept of RDD (Resilient Distributed Dataset). Also, state how you can create RDDs in Apache Spark.

424

What is a secondary namenode?

675

How can I import large objects (BLOB and CLOB objects) in Apache Sqoop?

What are the tools used in big data?

472

Define the roles of the file system in any framework?

318

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