Hadoop interview questions part 37
Hadoop interview questions part 37
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Total Questions: 20
1. ___________ is added for supporting writing single replica files in memory.
Correct Answer is : RAM_DISK
2. Which of the following has high storage density ?
Correct Answer is : ARCHIVE
3. Point out the wrong statement :
Correct Answer is : None of the mentioned
4. Which of the following storage policy is used for both storage and compute ?
Correct Answer is : Hot
5. Which of the following is only for storage with limited compute ?
Correct Answer is : Cold
6. When a block is warm, some of its replicas are stored in DISK and the remaining replicas are stored in :
Correct Answer is : ARCHIVE
7. ____________ is used for storing one of the replicas in SSD.
Correct Answer is : One_SSD
8. ___________ is used for writing blocks with single replica in memory.
Correct Answer is : Lazy_Persist
9. _________ is a data migration tool added for archiving data.
Correct Answer is : Mover
10. Point out the correct statement :
Correct Answer is : addCacheArchive add archives to be localized
11. Which of the following is used to list out the storage policies ?
Correct Answer is : hdfs storagepolicies
12. Which of the following statement can be used get the storage policy of a file or a directory ?
Correct Answer is : hdfs dfsadmin -getStoragePolicy path
13. Point out the wrong statement :
Correct Answer is : getInstance() creates a new Job with particular cluster
14. Which of the following method is used to get user-specified job name ?
Correct Answer is : getJobName()
15. __________ get events indicating completion (success/failure) of component tasks.
Correct Answer is : getTaskCompletionEvents(int startFrom)
16. _________ gets the diagnostic messages for a given task attempt.
Correct Answer is : getTaskOutputFilter(Configuration conf)
17. reduceProgress() gets the progress of the job’s reduce-tasks, as a float between :
Correct Answer is : 0.0-1.0
18. The Job makes a copy of the _____________ so that any necessary internal modifications do not reflect on the incoming parameter.
Correct Answer is : Configuration
19. ___________ generates keys of type LongWritable and values of type Text.
Correct Answer is : TextInputFormat
20. Point out the correct statement :
Correct Answer is : All of the mentioned
