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

Question : There are two option as below to create HTable

1.
HBaseConfiguration conf = HBaseConfiguration.create();
HTable table1 = new HTable(conf, "myTable");
HTable table2 = new HTable(conf, "myTable");

2.
HBaseConfiguration conf1 = HBaseConfiguration.create();
HTable table1 = new HTable(conf1, "myTable");
HBaseConfiguration conf2 = HBaseConfiguration.create();
HTable table2 = new HTable(conf2, "myTable");

Which of the approach is recommended


1. Both 1 and 2 are equal
2. 1 is recommnded
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HBaseConfiguration instance is recommended





Question : HTable is a thread-safe and should not create a unique instance in each thread or and using HTablePool is not a good idea

1. True
2. false



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Explanation: HTable is not thread-safe
- Create a unique instance in each thread or use HTablePool





Question : HBase uses byte arrays for ..


1. Row keys
2. column names
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4. All of the above




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Related Questions

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Question : _____________ Automatically moves regions around to balance cluster load


1. Regions
2. HMaster
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4. ZooKeeper
5. Load Balancer



Question : Data is distributed across Regions based on _______________

1. Column Family
2. Regions
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4. Load


Question : select the correct statement

1. Region Size basic element of availability and distribution
2. High Region count (e.g., more than 3000) can impact performance
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4. 1 ,2 and 3 are not correct
5. All 1,2 and 3 are correct


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

1. True
2. False



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



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

1. Region
2. Region Store
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