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

On what basis Namenode will decide which datanode to write on?

1299

Can Hadoop be compared to NOSQL database like Cassandra?

957

What is a Secondary Namenode? Is it a substitute to the Namenode?

1064

what are relational operations in pig latin?

913

What is the difference between SQL and NoSQL?

1134

What are the additional benefits YARN brings in to Hadoop?

1009

what are the steps involved in decommissioning removing

1065

What is the process to change the files at arbitrary locations in HDFS?

1447

What is difference between split and block in hadoop?

1437

How many JVMs run on a slave node?

1090

What is a block and block scanner in HDFS?

1062

What is compute and Storage nodes?

1056

how would you modify that solution to only count the number of unique words in all the documents?

1011

How can you overwrite the replication factors in HDFS?

1279

What are the modules that constitute the Apache Hadoop 2.0 framework?

1046

Un-Answered Questions { Hadoop }

How to come out of the insert mode?

834

How much is flume worth?

Can you define rdd?

321

What counter in Hadoop MapReduce?

693

what is the meaning of broker in Kafka?

597

Did edmond berger invent the spark plug?

394

What is CQLSH in Cassandra?

100

Do we need to install scala for spark?

325

What does ambari shell can provide?

Explain the various types of partitioners in cassandra?

What is difference between map and flatmap in spark?

340

What do you mean by Free Form Import in Sqoop?

What is lambda architecture spark?

333

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

701

What are broadcast variables in Apache Spark? Why do we need them?

331

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