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- HBase - Disabling a Table
- HBase - Enabling a Table
- HBase - Describe & Alter
- HBase - Exists
- HBase - Drop a Table
- HBase - Shutting Down
- HBase - Client API
- HBase - Create Data
- HBase - Update Data
- HBase - Read Data
- HBase - Delete Data
- HBase - Scan
- HBase - Count & Truncate
- HBase - Security
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 - 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 - All MapReduce jobs reading from an Hbase table accept their[K1,V1] pair in the form of
Answer : B
Explanation
The key and value in a mapreduce job reading from a Hbase table correspond to the [rowkey:scan result] values.
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 - While rows and columns keys are expressed as bytes, version is specified as
Answer : B
Explanation
the version is specified using a long integer. Typically this long contains time instances such as those returned by java.util.Date.getTime()
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 - If one single column family exceeds the maximum file size specified by Hbase configuration then
A - Data load error is encountered
B - The column family is dropped
Answer : D
Explanation
Once the max file size is reached, the region is split into two.
Q 10 - The exported data using the inbuilt export utility from Hbase table is in which file format
Answer : C
Explanation
The data exported from Hbase table using the inbuilt export utility is in sequence file format.