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 is a file of the size 1 GB uncompressed

931

Is map like a pointer?

917

What is the default replication factor?

988

What should be the ideal replication factor in Hadoop Cluster?

2 3108

How can one increase replication factor to a desired value in Hadoop?

1120

In Map Reduce why map write output to Local Disk instead of HDFS?

903

What is a Record Reader in hadoop?

957

What is version-id mismatch error in hadoop?

1055

how to share the metastore within multiple users?

918

What is a partitioner and how the user can control which key will go to which reducer?

939

Hive for Hadoop - Give some points?

1 2038

How do you define "block" in HDFS?

898

Where is the Mapper Output intermediate kay-value data stored ?

1354

How does Mappers run method works?

893

What are the components of Apache Pig platform?

747

Un-Answered Questions { Hadoop }

How to load data in pig?

607

Define the consistency levels for read operations in Cassandra?

what is JobTracker in Hadoop? What are the actions followed by Hadoop?

769

what is NameNode in Hadoop?

878

What is the use of ZooKeeper?

228

How do ‘map’ and ‘reduce’ work?

650

Why is Apache Spark faster than Apache Hadoop?

842

What are the basic steps to writing a UDF Function in Pig?

701

Is impala intended to handle real time queries in low-latency applications or is it for ad hoc queries for the purpose of data exploration?

Explain what is namenode in hadoop?

438

How will you list all the columns of a table using Apache Sqoop?

Can multiple clients write into an HDFS file concurrently in hadoop?

What is DStream in Apache Spark Streaming?

319

Does Hoe Spark handle monitoring and logging in Standalone mode?

276

What is Streaming / Log Data?

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