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- HBase - Enabling a Table
- HBase - Describe & Alter
- HBase - Exists
- HBase - Drop a Table
- HBase - Shutting Down
- HBase - Client API
- HBase - Create Data
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- HBase - Read Data
- HBase - Delete Data
- HBase - Scan
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- 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 - Hbase is what type of database?
Answer : C
Explanation
Hbase is a schema less database as it stores data in column families which does not have a fixed or rigid structure to follow.
Q 2 - The addFamily() command is used for
A - Displaying all columns of a specific column family
B - Add new column family to the table
Answer : A
Explanation
The addFamily() command displays all the columns of a specific column family.
Q 3 - The default number of versions of a cell value which Hbase can store is
Answer : B
Explanation
Hbase stores 3 version of a value in a cell. But this can be configured to a higher value.
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 - 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 - 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 - 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.