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?

429

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

440

What is pseudo-distributed mode?

609

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

490

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

504

Are job tracker and task trackers present in separate machines?

465

What is namenode?

488

what if job tracker machine is down?

479

What are the four basic parameters of a mapper?

572

In which location name node sores its metadata and why?

673

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

629

How namenode handles data node failures?

529

What is the non dfs used?

556

How can one write custom record reader?

492

Whats the default port that jobtrackers listens ?

479

Un-Answered Questions { Hadoop }

What do you know about nlineinputformat?

689

How to start a kafka server?

616

While reading data from hbase, from which three places data will be reconciled before returning the value?

198

How can one check whether NameNode is working or not?

545

What is Apache Spark and what are the benefits of Spark over MapReduce?

282

Define Actions.

303

Explain the maximum size of a message that can be received by the Kafka?

725

Would you be able to change the block size of hdfs files?

What must we know to work on Zookeeper well?

Clarify how hive de-serialize and serialize the information?

646

Which interface needs to be implemented to create Mapper and Reducer for the Hadoop?

1217

What is the use of binstorage?

572

Define catalog tables in HBase?

215

Is it possible to add or delete column families in a working group?

How does spark rdd work?

319

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