Big Data Interview Questions
Questions Answers Views Company eMail

What are the functionalities of jobtracer?

3

How does fault tolerance work in mapreduce?

7

What is a scarce system resource?

9




With the help of two examples name the map and reduce function purpose

7

Write a short note on the disadvantages of mapreduce

7

Explain what you understand by speculative execution

9

Explain combiners.

8

when do reducers play their role in a mapreduce task?

7

In mapreduce what is a scarce system resource? Explain?

9

What do you understand by mapreduce?

6

Explain how mapreduce works.

5

What is an input reader in reference to mapreduce?

9

How is mapreduce related to cloud computing?

7

Define the purpose of the partition function in mapreduce framework

7

What are the various input and output types supported by mapreduce?

3







Un-Answered Questions { Big Data }

What is the difference between Gen1 and Gen2 Hadoop with regards to the Namenode?

442


What are common spark ecosystems?

3


What is the prerequisite for Apache Hive installation?

9


Can you explain spark graphx?

1


What are the types of transformation in RDD in Apache Spark?

11






Have you ever used Counters in Hadoop. Give us an example scenario?

336


Which java class handles the Input record encoding into files which store the tables in Hive?

32


How to create hadoop archive?

3


What are the exact differences between reduce and fold operation in Spark?

3


How will you convert the string ’51.2’ to a float value in the price column?

18


Name the filter which accepts the page size as the parameter in hbase?

1


What are the core api’s of kafka?

3


List the configuration parameters that have to be specified when running a MapReduce job.

7


What kind of datawarehouse application is suitable for Hive?

16


What is the role of the secondary namenode?

3