Cloudera HBase Certification Questions and Answers (Dumps and Practice Questions)

Question : When Regions get too big (MB) they are automatically split

1. True
2. False


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Question : Select the correct statement for Region Split , where RegionServer handles the region splits

1. Adds daughter regions to .META
2. It Offlines the original region
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4. Daughter regions reference the original regions until compaction
5. All of the above


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When Regions get too big (256MB) they are automatically split
RegionServer handles the region splits
1. Offlines the original region
2. Adds daughter regions to .META.
3. Access Mostly Uused Products by 50000+ Subscribers
Daughter regions reference the original regions until compaction
4. Reports the split to the Master






Question : A __________ hosts a MemStore and or more StoreFiles (HFiles)

1. Region
2. Region Store
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Related Questions

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Question :

Your client connects to HBase for the first time to read a row user_1234 located in a table Users. What
process does your client use to find the correct RegionServer to which it should send the request?


1. The client looks up the location of ROOT, in which it looks up the location of META, in which it looks up the
location of the correct Users region.
2. The client looks up the location of the master, in which it looks up the location of META, in which it looks up
the location of the correct Users region.
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4. The client queries the master to find the location of the Users table.





Question :

Your data load application is maintaining a custom versioning scheme (not using the timestamp as the version
number). You accidentally executed three writes to a given cell all with the same version during which time no
flushes have occurred. Which of the three data writes will dBase maintain?

1. None of the writes to cell
2. The last write to cell
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4. All of the writes to cell





Question :

Your client application needs to write a row to a region that has, recently split. Where will the row be written?



1. One of the daughter regions
2. The original region
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4. The HMaster




Question :

You have two tables in an existing RDBMS. One table contains order information (item, quantity, price, etc.)
and the other contains store information (address, phone, manager, etc). These two tables are not often
accessed simultaneously. You would like to move this data into HBase. How would you design the schema?


1. Create two tables each with a single column family
2. Create a single table with one column family
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4. Create two tables each with multiple column families




Question :

Which of the following configuration values determines automated splitting?


1. hbase.hregion.majorcompaction
2. hbase.hregion.flush.size
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4. hbase.hregion.max.filesize




Question :

From within an HBase application, you want to retrieve two versions of a row, if they exist. Where your
application should configure the maximum number of versions to be retrieved?


1. HTableDescriptor
2. HTable
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4. HColumnDescriptor