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
The write access log and Memstore confirm the writing of a Hbase value.
Q 2 - Hbase creates a new version of a record during
All the three events of creating,modifying and Deleting a record create a new version of the record inHbase.
The rowkey values are stored as a byte data.
Q 4 - The two tables which are used to find where regions of various tables are hosted are
The –ROOT_ and >META> table hold the data to find the location of regions.
Q 5 - While writing to Hbase using the Mapreduce tasks, each reduce tasks writes to
The writes go to the region that is responsible for the rowkey that is being written by the reduce task.
Q 6 - A namespace in Hbase is analogous to which data base object in a relational system?
A namespace is analogous to a database in relational syetm as it holds the tables.
Q 7 - Hbase can store
Hbase can store any data that can be converted to bytes.
Q 8 - Which filter accepts chance as a parameter?
The Random filter which returns a random row uses the chance parameter. Example- RandomRowFilter(float chance)
Q 9 - Which of the following is not a valid file in Habse?
in Hbase under the Hbase rot directory, each table is stored under a directory and under each table directory is a region directory for every region comprising that table.
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
The only two instances when the logs are replayed is when cluster starts or the server fails.