Hadoop Practitioner Training - Quiz

12 Questions | By Hadoop_training | Updated: Mar 21, 2022 | Attempts: 465

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1.

What is the default replication factor in hadoop?
- A.
  
  1
- B.
  
  3
- C.
  
  2
- D.
  
  No Limit
2.

When is a block treated to be under replicated?
- A.
  
  When the datanode is not responding to namenode
- B.
  
  When the copies are more than the replication factor
- C.
  
  When the number of copies of a block are less than the replication factor
- D.
  
  All of the above
3.

Diff between traditional distributed computing vs Hadoop distributed computing
- A.
  
  Code travels to data
- B.
  
  Data transfer between network is eliminated
- C.
  
  Cost effective and optimized performance
- D.
  
  All of the Above
4.

Hadoop is designed to replace Relational databases and best suited for OLTP applications?
- A.
  
  True
- B.
  
  False
5.

Select the ones you like
- A.
  
  Option1
- B.
  
  Option2
- C.
  
  Option3
- D.
  
  Option4
6.

In a Mapreduce program, the number of mappers to be executed is depending on
- A.
  
  The number of filesplits/blocks that needed to be processed
- B.
  
  Goes with default setup
- C.
  
  We cannot predict it
- D.
  
  Depending on the hadoop cluster capacity
7.

The hadoop daemons that will be running in a slave node are.
- A.
  
  Tasktracker,Secondarynamenode & Jobtracker
- B.
  
  TaskTracker &Datanode
- C.
  
  Task Tracker & Secondarynamenode
- D.
  
  Task tracker, & Jobtracker
8.

Which one do you like?
- A.
  
  Option 1
- B.
  
  Option 2
- C.
  
  Option 3
- D.
  
  Option 4
9.

Which of the following are valid hadoop commands to copy a file from local to hdfs
- A.
  
  Hadoop fs -copyToLocal
- B.
  
  Hadoop fs -copyFromLocal
- C.
  
  Hadoop fs -put
- D.
  
  Hadoop fs -moveFromLocal
10.

What is Speculative execution in hadoop
- A.
  
  Executing a hadoop job automatically based on oozie scheduler setup
- B.
  
  The ability of the framework that schedules a duplicate task if it takes too long to complete with a particular node/TT comparatively.
- C.
  
  User kills a job that is taking too long to complete and resubmits the same job on another machine
- D.
  
  Framework Calculates the Projected completion time of a job in hadoop