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 is HDFS block size and what did you chose in your project?

944

What is HDFS High Availability?

928

What are different types of filesystem?

1098

how can we change Replication Factor?

989

What is Hive Present Version ?

1058

What is the purpose of Hive Driver?

1011

In which scenario Hive is good fit?

935

Can i access Hive Without Hadoop ?

1 2628

What is difference between internal and external tables in hive?

1 2342

When Hive is run in embedded mode

1844

Can you execute Hadoop dfs Commands from Hive CLI? How?

1111

List the various options available with the Hive command?

852

Why Mapreduce output written in local disk?

965

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

978

Is YARN a replacement of Hadoop MapReduce?

1 1964

Un-Answered Questions { Hadoop }

Which port does SSH work on?

383

What are the operational commands of HBase?

183

How to come out of the insert mode?

732

Why the output of map tasks are stored (spilled ) into local disc and not in hdfs?

635

What problem does Apache Flume solve?

101

What happens if you get a ‘connection refused java exception’ when you type hadoop fsck /?

419

What kinds of impala queries or data are best suited for hbase?

What are the different execution modes available in Pig?

517

What will happen in case you have not issued the command?

723

Why comparison of types is important for MapReduce?

924

What happens to zk sessions while the cluster is down?

How to load data into table created in hive ?

658

How does apache spark work?

275

What is the difference between namenode, backup node and checkpoint namenode?

What is difference between map and flatmap in spark?

305

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