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 functionality of Query Processor in Apached Hive ?

722

Explain Data Type Conversion in Hive?

725

Explain SHOW and DESCRIBE Commands in Hive?

758

What are the views in Hive?

672

What are the different Primitive Data Types available in Hive?

703

Are there any problems which can only be solved by MapReduce and cannot be solved by PIG? In which kind of scenarios MR jobs will be more useful than PIG?

787

When to choose "Internal Table" in Hive?

726

What are the different parts of Hive ?

770

What are the types of tables in Hive?

745

Does Hive support record level Insert, delete or update?

696

Explain what is a Hive variable. What do we use it for?

729

Double type in Hive - Important points?

689

TRIM function in Hive with example?

730

What is different table structure available in the hive?

671

How can you add a new partition for the month December in the above partitioned table?

687

Un-Answered Questions { Hadoop }

What is the use of checkpoints in spark?

322

How to use hdfs put command for data transfer from flume to hdfs?

How does cassandra perform read operation? Explain

How to write a Custom Key Class?

946

What is kafka in hadoop?

526

On what basis name node distribute blocks across the data nodes in HDFS?

Mention what is the difference between apache kafka and apache storm?

559

What are the various libraries available on top of Apache Spark?

316

What do you understand by an inner bag and outer bag in Pig?

861

What are the differences between a node, a cluster, and datacenter in Cassandra?

Explain what is a column family in cassandra?

124

Clarify how job tracker schedules an assignment?

423

Why is apache spark so fast?

285

What happens when a datanode fails ?

787

What is the use of dataframe in spark?

294

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