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

Big Data Interview Questions

Questions Answers Views Company eMail

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?

Why HDFS performs replication, although it results in data redundancy in Hadoop?

Can multiple clients write into a Hadoop HDFS file concurrently?

Un-Answered Questions { Big Data }

How spark is used in hadoop?

287

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

What is zookeeper server?

What is executor memory in a spark application?

304

What is Disk Balancer in Apache Hadoop?

889

Some of the most notable applications of Kafka?

514

What was the design goal of Cassandra?

Which interface needs to be implemented to create Mapper and Reducer for the Hadoop?

1214

Why should we use ‘orderby’ keyword in pig scripts?

528

What happens if there is an error in impala?

243

what Hive is composed of ?

679

Is it possible to use same metastore by multiple users, in case of embedded hive?

659

What is salary of hadoop developer?

690

What is spark context spark session?

283

Can you define serde in hive?

672

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