HBase Online Quiz


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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.

Questions and Answers

Answer : A

Explanation

There is only one Memstore per column family

Q 2 - A record deleted in Hbase is not removed from Hbase immediately. Instead it is written to another file and marked as Delete. Such a file is Known as

A - DFile

B - Tombfile

C - Tombstone

D - Earmark

Answer : C

Explanation

The deleted records are stored in file is known as Tombstone.

Q 3 - Filters in Hbase can be applied to

A - Rowkeys

B - Column qualifiers

C - Data values

D - All of the above

Answer : D

Explanation

Filetrs can be applied to rowkeys,column qualifiers and data values.

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

A - Split

B - Region

C - Rowarea

D - Tablearea

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 number of namespaces, HDFS provides to the regionservers of a Hbase database is

A - Equal to number of regionserver

B - Half of the number of regionserver

C - Double the number of regionserver

D - One

Answer : D

Explanation

HDFS provides a single namespace to all the RegionServers,and any of them can access the persisted files from any other Regionserver.

Answer : D

Explanation

By default HBase runs in standalone mode. For a fully distributed configuration set the hbase-cluster.distributed property to true.

Answer : D

Explanation

Hbase can store any data that can be converted to bytes.

Q 8 - A coprocessor is executed when an event occurs. This type of coprocessor is known as

A - Observer

B - Listener

C - Master

D - Event handler

Answer : A

Explanation

The observer type of coprocessor is executed when an event occurs.

Answer : B

Explanation

A Hbase column family cannot be renamed. The only option is to create a new column family and copy the data.

Answer : C

Explanation

Without changing the schema awe can add columns to a column family in Hbase.

hbase_questions_answers.htm
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