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

What are the general Prerequisites to learn HCatalog?

How HCatalog helps to capture processing states to enable sharing?

How to invoke Command Line Interface?

Who is intended audience to learn HCatalog?

Explain HCatalog Create Table CLI along with its syntax?

State some DDL Command with brief Description?

Explain Apache Ambari?

How many layers of Hadoop components are supported by Apache Ambari and what are they?

What are the particular functionalities of Ganglia in Ambari?

What are the particular functionalities of Nagios in Ambari?

Name several advantages of Apache Ambari?

Who should learn Apache Ambari?

Explain Apache Ambari architecture?

Can Ambari manage multiple clusters?

What are the major areas where Ambari helps the system administrators to do?

Un-Answered Questions { Hadoop }

What does meta-store means in hive?

659

What is the fundamental difference between a MapReduce InputSplit and HDFS block?

589

What are the drawbacks of Apache Spark?

307

Is spark better than mapreduce?

262

What is the relationship between Hadoop, HBase, Hive and Cassandra ?

145

How would you tackle counting words in several text documents?

987

What is rack awareness in hadoop?

459

Assume that an HBase table Student is disabled. So, how to access the student table once it is disabled, by using Scan command?

169

Compare Spark vs Hadoop MapReduce

321

How can you manually partition the rdd?

279

Differentiate between the terms: node, a cluster, and data center in cassandra?

What is an offset?

471

What is identity mapper and reducer? In which cases can we use them?

978

What is Sqoop Job?

Why do we need indexing?

670

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