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?

851

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?

784

What is the difference between local and remote metastore?

1147

What are different modes of metastore deployment in Hive?

738

Mention what are the type of database does Hive support ?

756

What is LazyOutputFormat in MapReduce?

732

What is Output Format in MapReduce?

745

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

665

What are the identity mapper and reducer in MapReduce?

844

How to optimize Hadoop MapReduce Job?

682

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

780

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

704

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

657

Un-Answered Questions { Hadoop }

What do you understand by Kundera?

What is the difference between reducebykey and groupbykey?

312

What are the applications of Apache ZooKeeper?

Why do we use persist () on links rdd?

315

Different Running Modes of Apache Spark

318

Is spark faster than hadoop?

365

What is Apache Spark?

390

What is a tuple in spark?

300

What are the components of presto architecture?

How can Spark be connected to Apache Mesos?

342

How to access HDFS?

Describe Memtable?

What is a task tracker?

what is WebDAV in Hadoop?

798

Compare Hadoop and Spark?

341

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