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 is "map" and what is "reducer" in Hadoop?

686

What is Shuffling and Sorting in a MapReduce?

718

What is the difference between Hadoop and RDBMS?

684

how can you check whether Namenode is working beside using the jps command?

728

Illustrate a simple example of the working of MapReduce.

686

For a Hadoop job, how will you write a custom partitioner?

715

what happens when Hadoop spawned 50 tasks for a job and one of the task failed?

742

what is the Hadoop MapReduce APIs contract for a key and value class?

712

When is it suggested to use a combiner in a MapReduce job?

691

What is the process of changing the split size if there is limited storage space on Commodity Hardware?

769

how Hadoop is different from other data processing tools?

701

List the configuration parameters that have to be specified when running a MapReduce job.

646

what is a sequence file in Hadoop?

737

What are the key differences between Pig vs MapReduce?

659

When is it not recommended to use MapReduce paradigm for large

695

Un-Answered Questions { Hadoop }

What is standalone mode in spark?

362

What types of costs are associated with creating the index on hive tables?

1065

Explain the functionalities of ganglia in ambari?

Mention some instances where zookeeper is using?

Why is Kafka technology significant to use?

556

What languages support spark?

302

Can you explain spark core?

280

What is apache flume used for?

can you explain about configuration files?

State some advantages of impala?

What is the problem with HDFS and streaming data like logs

1067

List the various HDFS daemons in HDFS cluster?

What is Cassandra Database Software ?

166

What does a 'MapReduce Partitioner' do?

735

How to specify more than one path for storage in Hadoop?

559

For More Un-Answered { Hadoop } Questions Click Here