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

What do you understand by standalone (or local) mode?

473

What type of data we should put in distributed cache? When to put the data in dc? How much volume we should put in?

473

What is pseudo-distributed mode?

648

When we send a data to a node, do we allow settling in time, before sending another data to that node?

526

Can we write map reduce program in other than java programming language. How?

524

Are job tracker and task trackers present in separate machines?

502

What is namenode?

518

what if job tracker machine is down?

512

What are the four basic parameters of a mapper?

617

In which location name node sores its metadata and why?

704

What are input format, input split & record reader and what they do?

664

How namenode handles data node failures?

566

What is the non dfs used?

594

How can one write custom record reader?

526

Whats the default port that jobtrackers listens ?

513

Un-Answered Questions { Hadoop }

What are the network requirements for hadoop?

523

What is the difference between scala and spark?

327

Explain the uses of PIG?

1007

Explain values() operation in apache spark?

532

What are the primary phases of a Reducer?

877

What ensures load balancing of the server in Kafka?

692

Explain how to Tune Kafka for Optimal Performance?

586

What is a rack awareness algorithm and why is it used in hadoop?

What are the two ways to create rdd in spark?

334

What is hive installation path?

791

is HQL case sensitive?

897

How Hadoop is cost-effective?

450

How does Mappers run method works?

939

What is the problem with the small file in Hadoop?

687

What is the InputFormat ?

1063

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