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

How Hive distributes the rows into buckets?

850

Why is Hive not suitable for OLTP systems?

817

Why do we perform partitioning in Hive?

792

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

781

What is the difference between local and remote metastore?

1147

What are different modes of metastore deployment in Hive?

734

Mention what are the type of database does Hive support ?

755

What is LazyOutputFormat in MapReduce?

731

What is Output Format in MapReduce?

743

Explain the features of Apache Spark because of which it is superior to Apache MapReduce?

664

What are the identity mapper and reducer in MapReduce?

840

How to optimize Hadoop MapReduce Job?

681

How to specify more than one directory as input in the Hadoop MapReduce Program?

778

How to change the name of the output file from part-r-00000 in Hadoop MapReduce?

702

Which one will you decide for an undertaking – Hadoop MapReduce or Apache Spark?

656

Un-Answered Questions { Hadoop }

What is executor cores in spark?

305

What do you understand by the term snitch in cassandra?

Differentiate between drop and truncate in cqlsh

how JobTracker schedules a task ?

909

How many ways can you create rdd in spark?

342

What is the significance of using –compress-codec parameter?

Explain HCatLoader APIs?

What is difference between secondary namenode, checkpoint namenode & backupnode?

507

Enlist the several components in Kafka?

707

How Pig differs from MapReduce?

845

Where sorting is done in Hadoop MapReduce Job?

690

Have you ever used counters in hadoop?

458

Explain Spark Streaming with Socket?

345

What are shared variables?

349

How is jmx useful in cassandra?

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