Hadoop Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Hadoop Interview Questions

Questions Answers Views Company eMail

How to perform the inter-cluster data copying work in HDFS?

What are the main properties of hdfs-site.xml file?

Describe HDFS Federation?

What is active and passive NameNode in HDFS?

228

Does HDFS allow a client to read a file which is already opened for writing in hadoop?

How data or file is read in Hadoop HDFS?

How HDFS helps NameNode in scaling in Hadoop?

What is Fault Tolerance in Hadoop HDFS?

How can one copy a file into HDFS with a different block size to that of existing block size configuration?

What is a Block Scanner in HDFS?

Differentiate HDFS & HBase?

How data or file is written into Hadoop HDFS?

In HDFS, how Name node determines which data node to write on?

What is Secondary NameNode in Hadoop HDFS?

How to restart NameNode or all the daemons in Hadoop HDFS?

Un-Answered Questions { Hadoop }

If DataNode increases, then do we need to upgrade NameNode in Hadoop?

461

How to write a Custom Key Class?

946

What is Flume event?

What is the number of default partitioner in hadoop?

442

Define Writable data types in Hadoop MapReduce?

646

What is HBase HMaster?

360

Define Nodetool Utility?

Explain Apache Ambari architecture?

how to proceed to write your first mapreducer program?

1351

How can we import data from particular row or column? What is the destination types allowed in Sqoop import command?

Is it possible to use Kafka without ZooKeeper?

662

What do you understand by unit and ()in scala?

505

Can we run spark without hadoop?

293

What is the man difference between hbase and hive?

680

What is gossip protocol in Cassandra?

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