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

Is it possible to overwrite Hadoop MapReduce configuration in Hive?

773

Is it possible to use same metastore by multiple users, in case of embedded hive?

702

When executing Hive queries in different directories, why is metastore_db created in all places from where Hive is launched?

882

What is the functionality of Query Processor in Apache Hive?

804

What is the difference between Hive CLI and Beeline?

890

What kind of data warehouse application is suitable for Hive? What are the types of tables in Hive?

771

Give examples of the SerDe classes whihc hive uses to Serializa and Deserilize data?

781

How can you prevent a large job from running for a long time? What do u think is more popular among the developers - Pig or Hive?

714

Differentiate between describe and describe extended?

743

What is sample Query in Hive?

746

What is bag?

720

What are the different Data Types available in Hive?

752

Wherever (Different Directory) I run hive query, it creates new metastore_db, please explain the reason for it?

706

What database are supported by Hive?

747

What will happen in case you have not issued the command?

803

Un-Answered Questions { Hadoop }

What does heartbeat in hdfs means?

Define partitions in apache spark.

2194

What is Fault Tolerance?

570

Where is spark used?

380

What is executor in spark?

326

Which command is used to show the current hbase user?

194

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

What is Apache Spark?

390

Where is rdd stored?

327

Explain first() operation in Apache Spark RDD?

402

Give the differences between the different types of primary keys in cassandra?

Which language is better for spark?

313

What is Apache Spark and what are the benefits of Spark over MapReduce?

296

Why is Transformation lazy in Spark?

362

Mention how many inputsplits is made by a hadoop framework?

618

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