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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 - What is the number of MemStore per column family
Answer : A
Explanation
There is only one Memstore per column family
Q 2 - Each version of data within a cell adds a versioning information through a
Answer : B
Explanation
Each version of data within a cell contributes one KeyValue instance to the Result.
Q 3 - The values stored inside a cell which is identified using a rowkey, column family and column qualifier is stored as
Answer : A
Explanation
The data stored inside a cell is always in Byte format.
Q 4 - A small chunk of data residing in one machine which is part of a cluster of machines holding one Hbase table is known as
Answer : B
Explanation
A region in Hbase table represents a small chunk of data which is part of a large Hbase table distributed across many servers.
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 - The two predefined namespace in Hbase are
Answer : B
Explanation
The toe predefined namespace in Hbase are – habse and default. Habse contains internal tables and default contains the tables which are not qualified with any namespace.
Q 7 - All data returned from a Hbase query is sorted. They are sorted by
A - rowkey, ColumnFamily,, Column qualifier, timestamp
B - ColumnFamily,, Column qualifier, rowkey,,timestamp
Answer : A
Explanation
They result from Hbase is sorted by
ColumnFamily,,Column qualifier, rowkey,,timestamp
Q 8 - The type of coprocessors which are similar to the stored procedures in relational database is
Answer : D
Explanation
The Endpoint type of coprocessor is similar to the data abse store dprocedure in relational systems.
Q 9 - When a region does not have recovered.edits file, it indicates,
A - No compaction has happened in the region
B - Only major compaction has happened.
Answer : D
Explanation
Only the write-ahead replay cerates the recovered.edits file
Q 10 - In Habse the column can be added to a table
B - Before changing the schema
Answer : C
Explanation
Without changing the schema awe can add columns to a column family in Hbase.
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