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

Big Data Interview Questions

Questions Answers Views Company eMail

Distinguish HDFS Block and Input Unit?

What are the difference between of the “HDFS Block” and “Input Split”?

What happens when two users try to access to the same file in HDFS?

Does the HDFS go wrong? If so, how?

Why is HDFS only suitable for large data sets and not the correct tool to use for many small files?

What happens when two clients try to access the same file on HDFS?

183

What are the different file permissions in the HDFS for files or directory levels?

142

How to read file in HDFS?

When NameNode enter in Safe Mode?

Write command to copy a file from HDFS to linux(local).

How to create directory in HDFS?

How to Delete directory from HDFS?

What are the main features of hdfssite.xml?

Write the command to copy a file from linux to hdfs?

How to copy file from HDFS to local?

Un-Answered Questions { Big Data }

What exactly is spark?

268

Explain HDFS “Write once Read many” pattern?

Why MapReduce uses the key-value pair to process the data?

603

What are the hadoop's three configuration files?

645

What are the important features of hadoop?

413

What is struct and explain its purpose?

477

Give the sqoop command to see the content of the job named myjob?

What is the use of MasterServer?

169

Explain about the common workflow of a Spark program?

314

What are Actions? Give some examples.

300

what needs to be taken care while adding a Column?

100

How to transfer data from Hive to HDFS?

Compare RDBMS with Hadoop MapReduce.

595

What is a keyspace in Cassandra?

102

What do you mean by metadata in HDFS?

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