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HBase Online Quiz
Following quiz provides Multiple Choice Questions (MCQs) related to HBase. You will have to read all the given answers and click over the correct answer. If you are not sure about the answer then you can check the answer using Show Answer button. You can use Next Quiz button to check new set of questions in the quiz.
Q 1 - A single HF file can be associated with
A - All the column families in a table
Answer : B
Explanation
A single HF file can be associated with only one column family.
Q 2 - At the end of a major compaction the number of HFiles of a Hbase table is
A - Equal to number of column families
Answer : A
Explanation
At the end of major compaction one column family gets one HFile.
Q 3 - Filters in Hbase can be applied to
Answer : D
Explanation
Filetrs can be applied to rowkeys,column qualifiers and data values.
Q 4 - Servers that host regions of a Hbase table are called
Answer : A
Explanation
The Regionservers are the servers which hold the regions of a Hbase table.
Q 5 - Hbase stores data in
A - A single filesystem available to all RegionServers
B - As many filesystems as the number of regionServers
Answer : A
Explanation
HBase stores its data on a single file system. It assumes all the RegionServers have access to that file system across the entire cluster.
Q 6 - In the standalone mode Hbase runs on
Answer : A
Explanation
In standalone mode Hbase runs only on the local file system.
Q 7 - The schema level changes to table or column families(like region size, block size etc) are reflected
A - Immediately after the changes
B - Only after a major compaction
Answer : B
Explanation
Only after a major compaction and the StoreFiles get re-written the schema level changes are available.
Q 8 - The table descriptor can be used only for which type of coprocessors?
Answer : A
Explanation
The table descriptors are used only for the Region servers hence the region related coprocessors.
Q 9 - The metadata of region is accessed using the file named
Answer : C
Explanation
The file .regioninfo stores the metadata information.
Q 10 - In Hbase there are two situations when the WAL logfiles needs to be replayed. One is when the server fails. The other is when
Answer : C
Explanation
The only two instances when the logs are replayed is when cluster starts or the server fails.
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