Bigdata - Interview Questions and Answers for 'Barclays' | Search Java Interview Question - javasearch.buggybread.com
Javasearch.buggybread.com
Share

Search Interview Questions


 2720 questions in repository.
 There are more than 200 unanswered questions.
Click here and help us by providing the answer.
 Have a video suggestion.
Click Correct / Improve and please let us know.
Label / Company      Label / Company / Text

   



Barclay


   




Bigdata - Interview Questions and Answers for 'Barclays' - 2 question(s) found - Order By Newest

 Q1. What is the difference between namenode and datanode in Hadoop? BigData
Admin
info@buggybread.com
Ans. NameNode stores MetaData (No of Blocks, On Which Rack which DataNode is stored etc) whereas the DataNode stores the actual Data.

 Help us improve. Please let us know the company, where you were asked this question :   

   Like      Discuss      Correct / Improve     hadoop   at&t     Barclays  AT&T


Related Questions

  Which is the default Input Formats defined in Hadoop ?
  Which of the following is not an input format in Hadoop ?
  Which of the following is a valid flow in Hadoop ?
  MapReduce was devised by ...
  Which of the following is not a phase of Reducer ?
  How many instances of Job tracker can run on Hadoop cluster ?
a. 1
b. 2
c. 3
d. 4
  Which of the following is not the Dameon process that runs on a hadoop cluster ?
  What is a Sequence File?
  What is the input to the Reduce function ?


 Q2. What is the use of Combiners ?BigData2016-10-17 10:03:41

Ans. Combiners are used to increase the efficiency of a Map Reduce program. They are used to aggregate intermediate map output locally on individual mapper outputs. Combiners can help you reduce the amount of data that needs to be transferred across to the reducers.

 Help us improve. Please let us know the company, where you were asked this question :   

   Like      Discuss      Correct / Improve     Hadoop Systems  BigData   hadoop combiners     Barclays


Related Questions

  What is the difference between namenode and datanode in Hadoop?
  Which is the default Input Formats defined in Hadoop ?
  Which of the following is not an input format in Hadoop ?
  Which of the following is a valid flow in Hadoop ?
  MapReduce was devised by ...
  Which of the following is not a phase of Reducer ?
  How many instances of Job tracker can run on Hadoop cluster ?
a. 1
b. 2
c. 3
d. 4
  Which of the following is not the Dameon process that runs on a hadoop cluster ?
  What is a Sequence File?
  What is the input to the Reduce function ?




Subscribe to Java News and Posts. Get latest updates and posts on Java from Buggybread.com
Enter your email address:
Delivered by FeedBurner



comments powered by Disqus
 

Help us and Others Improve. Please let us know the questions asked in any of your previous interview.

Any input from you will be highly appreciated and It will unlock the application for 10 more requests.

Company Name:
Questions Asked:
         

X Close this

Barclay: I had 5 rounds of interview for a ... Anonymous

X Close this

Help Us Improve.
Please share your
interview experience.

Company Name:   


Questions Asked: