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 will format the HDFS ?

1066

what are the steps involved in commissioning adding

910

How to use Apache Zookeeper command line interface?

1138

Can NameNode and DataNode be a commodity hardware?

1679

What are the steps to submit a Hadoop job?

906

What is the heartbeat used for?

1045

How would you tackle counting words in several text documents?

1022

What are the Basics of Hadoop?

930

Explain the shuffle?

921

How blocks are distributed among all data nodes for a particular chunk of data?

1090

How can I install Cloudera VM in my system?

958

How we can take Hadoop out of Safe Mode?

IBM,

855

What is Writable & WritableComparable interface?

930

What will be the consideration while we do Hardware Planning for Master in Hadoop architecture?

1075

What is configuration of a typical slave node on Hadoop cluster? How many JVMs run on a slave node?

1032

Un-Answered Questions { Hadoop }

Explain the difference between an hdfs block and input split?

Specify the different types of tables accessible in hive?

801

Explain bagtotuple?

580

Mention what is the best way to copy files between hdfs clusters?

Explain what is zookeeper in kafka? Can we use kafka without zookeeper?

537

Can you explain how do ‘map’ and ‘reduce’ work?

734

What is a cell in hbase?

179

What is presto?

What is vectorized query execution?

317

What is the difference between map and flatmap?

305

What are benefits of DataFrame in Spark?

328

How are joins performed in impala?

103

Does cassandra support acid tractions?

What is the significance of cluster class in Cassandra?

Is hive similar to sql?

729

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