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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 - There are 2 programs which confirm a write into Hbase. One is write-ahead log(WAL) and the other one is
Answer : D
Explanation
The write access log and Memstore confirm the writing of a Hbase value.
Q 2 - When a compaction operates over all HFiles in a column family in a given region, it is called
Answer : A
Explanation
IN a Major compaction all the HFIles of a column family for a given region are acted upon.
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 - The size of a individual region is governed by the parameter
Answer : C
Explanation
The parameter Hbase.region.max.filesize is present in hbase-site.xml and it is configured to decide the size of the region.
Q 5 - The part of a Mapreduce Task which writes to a Hbase table is
Answer : B
Explanation
In case of reading Hbase through mapreduce the map tasks do the reading but in case of writing to Hbase the reduce tasks do the writing.
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 - Hbase can automatically delete rows by using
Answer : C
Explanation
Using TTL Hbase will delte all the rows that has reached the expiration time.
Q 8 - Which filer accepts the pagesize as a parameter?
Answer : C
Explanation
This filter gives the query result in different pages using Pagesize parameter.
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 - The Hbase master node orchestrates
Answer : D
Explanation
The Regionservers slaves are managed by the Hbase Master node