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

Does hadoop follows the unix pattern?

427

What is the hadoop-core configuration?

463

What is bucketing ?

683

Can we load data into a view?

701

Difference between hive and impala?

728

What are the types of hive ddl commands?

770

How can you stop a partition form being queried?

765

What is the default location where hive stores table data?

690

What are types of hive built-in functions?

742

Why do we need hive?

723

Is hive suitable to be used for oltp systems? Why?

795

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

1016

Give some points of hive for hadoop ?

722

Write a query to insert a new column(new_col int) into a hiev table (htab) at a position before an existing column (x_col)

788

What is a metastore in hive?

699

Un-Answered Questions { Hadoop }

Can the balancer be run while Hadoop is in use?

975

Is it necessary to kill the topology while updating the running topology?

578

On what basis Namenode will decide which datanode to write on?

1264

Mention the common features in Pig and Hive?

917

Explain pig architecture?

546

How do you define a partitioning key?

539

What is a namenode? How many instances of namenode run on a hadoop cluster?

643

Explain HDFS “Write once Read many” pattern?

What is spark vs scala?

269

What is Bucket in Hive?

721

Explain coalesce operation in Apache Spark?

323

Which storage level does the cache () function use?

299

What are the differences between Caching and Persistence method in Apache Spark?

313

Define Simple Strategy?

128

Can we say cogroup is a group of more than 1 data set?

725

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