Big Data Interview Questions
Questions Answers Views Company eMail

Distinguish HDFS Block and Input Unit?

1

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

1

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

1

Does the HDFS go wrong? If so, how?

1

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

1

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

1

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

1

How to read file in HDFS?

1

When NameNode enter in Safe Mode?

1

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

1

How to create directory in HDFS?

1

How to Delete directory from HDFS?

1

What are the main features of hdfssite.xml?

1

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

1

How to copy file from HDFS to local?

1







Un-Answered Questions { Big Data }

Explain what is hbase?

18


What is the function of consistency cqlsh command in Cassandra?

7


Can hive run without hadoop?

51


Define cell in HBase?

21


Compare apache pig and sql?

45






Why is Apache Spark faster than Hadoop MapReduce?

43


How do I install spark?

21


What is Hadoop Map Reduce ?

196


What is zookeeper server?

1


Explain partitions?

27


What are the important modes of hadoop?

3


Explain tomap function?

40


How Facebook Uses Hadoop, Hive and Hbase ?

72


Is it important for Hadoop MapReduce jobs to be written in Java?

153


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

1