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 the process to perform an incremental data load in Sqoop?

Can free form SQL queries be used with Sqoop import command?

What is the difference between an RDBMS and Hadoop?

614

How does Hadoop Classpath plays a vital role in stopping or starting in Hadoop daemons?

682

What is the data storage component used by Hadoop?

595

When is it not recommended to use MapReduce paradigm for large scale data processing?

632

What is sqoop in Hadoop ?

651

What do you understand by the term Straggler ?

645

Explain about the basic parameters of mapper and reducer function

1017

How many InputSplits is made by a Hadoop Framework?

600

What do you understand by compute and storage nodes?

652

Explain job scheduling through JobTracker

691

List the network requirements for using Hadoop ?

596

What is the next step after Mapper or MapTask?

606

What are the main components of MapReduce Job?

649

Un-Answered Questions { Hadoop }

Mention what is data cleansing?

408

What is big data spark?

298

What is the key difference between textfile and wholetextfile method?

257

How NameNode tackle Datanode failures in Hadoop?

442

What is spark certification?

300

How do we write our own custom serde?

663

What is apache spark architecture?

305

Can we run unix shell commands from hive? Can hive queries be executed from script files? How? Give an example.

756

What do you mean by Stream Processing in Kafka?

494

Explain the common input formats in hadoop?

446

What do you mean by ss table and explain how it is different from the other original tables?

What is the use of cassandra cql collection?

State the difference between Spark SQL and Hql

345

What is Derby database?

865

What are the machine learning algorithms supports in apache mahout?

115

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