Mapr (HP) Hadoop Developer Certification Questions and Answers (Dumps and Practice Questions)

Question : Which of the following is a correct statement regarding MapReduce job performance



1. You need to optimize memory, dist IO and networkIO to optimize the Space taken during the Job execution.

2. You need to optimize map and reduce task code execution steps time, to save the total time of job execution.

3. Access Mostly Uused Products by 50000+ Subscribers

4. 1,2

5. 1,2,3


Correct Answer : Get Lastest Questions and Answer :
Explanation:




Question : You are a Hadoop Administrator, you need to optimize MapReduce Job. And decided to first look on the Slot configuration.
So what you should keep in your mind, for slot configuration?


1. You can reserve the slot for Map Tasks only

2. One slot can run only one either Map or Reduce Task

3. Access Mostly Uused Products by 50000+ Subscribers

4. 1,2
5. 1,2,3


Correct Answer : Get Lastest Questions and Answer :
Explanation:




Question : Select all applies to Slot (Map Slot and Reduce Slot)



1. Total number of reduce slots should be lower than the total number of map slots

2. You can reserve slots for both Reducer and Map tasks

3. Access Mostly Uused Products by 50000+ Subscribers

4. 1,2

5. 1,2,3



Correct Answer : Get Lastest Questions and Answer :
Explanation: Admin can override the number of slots.

Related Questions

---

Question : Which of the following you can use in MRv to monitor jobs



1. Job Tracker or Task Tracker Web Uis

2. you can use the metrics database (available through the MCS to monitor jobs

3. Access Mostly Uused Products by 50000+ Subscribers

4. 1,2
5. 1,2,3



Question : In MCS, What all information you can track about a Job



1. The time the job started executing

2. Percentage of map tasks executed

3. Access Mostly Uused Products by 50000+ Subscribers

4. 2,3

5. 1,2,3


Question : Which all of the problems can be solved using MapReduce?



1. Summarizing data

2. Filtering Data

3. Access Mostly Uused Products by 50000+ Subscribers

4. 2,3

5. 1,2,3



Question : What of the following can be done using MapReduce?


1. We can count and index group of data

2. Filter the data and fetching top n records

3. Access Mostly Uused Products by 50000+ Subscribers

4. 2,3
5. 1,2,3



Question : Select the correct order of the MapReduce program flow
A. Data Fed from input file to Mapper
C. shuffling of data
B. transformation of data
D. data written to the file


1. D,B,C,A
2. C,D,B,A
3. Access Mostly Uused Products by 50000+ Subscribers
4. B,A,C,D
5. A,D,B,C


Question : You have a ma () method in a Mapper class as below.
public void map(LongWritable key, Text value, Context context){}
What is the use of context object here?
A. It keeps Job configuration information
B. It gives currently running mapper to input split
C. It only contains the next record pointer to input split
D. A,B
E. A,B,C


1. It keeps Job configuration information

2. It gives currently running mapper to input split

3. Access Mostly Uused Products by 50000+ Subscribers

4. 1,2

5. 1,2,3