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

List Hadoop’s three configuration files?

458

What is Distributed Cache in Hadoop?

502

What is the relationship between Jobs and Tasks in Hadoop?

653

Who are ‘Data Scientists’?

460

Tell me some major benefits of Hadoop?

456

What is structured and unstructured data?

500

According to IBM, what are the three characteristics of Big Data?

476

Which port does SSH work on?

436

Is there another way to check whether Namenode is working?

459

What is the NameNode port number?

435

Give me an example of document database ?

532

What is the characteristic of streaming API that makes it flexible run MapReduce jobs in languages like Perl, Ruby, Awk etc.?

488

What are the four modules that make up the Apache Hadoop framework?

596

How does job tracker schedule a job for the task tracker?

492

What is 'jps'?

471

Un-Answered Questions { Hadoop }

Why we cannot do aggregation (addition) in a mapper? Why we require reducer for that?

668

Can you define parquet file?

298

Can you list down the limitations of using Apache Spark?

326

Explain about the indexing process in hdfs?

When a large data set is maintained?

778

Define various running modes of apache spark?

305

How is jmx useful in cassandra?

What are the names of daemons in impala?

How does executor work in spark?

331

What is Hadoop Custom partitioner ?

1047

In cloudera there is already a cluster, but if I want to form a cluster on ubuntu can we do it?

780

State the limitations of Apache Pig?

652

What is the relationship between Hadoop, HBase, Hive and Cassandra ?

151

What is the command to start and stop the Spark in an interactive shell?

329

How much Metadata will be created on NameNode in Hadoop?

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