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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 - The Value that is unique across all the rows in Hbase table is
Answer : D
Explanation
Rowkey is the value which is the unique values across all the rows.
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 data in a cell in Hbase table is identified using the four coordinates. Three of which are − rowkey,column family and column qualifier. The fourth coordinate used to identify each value in a cell is
Answer : B
Explanation
In every cell Hbase stores the version number for each piece of data along with the value. So the version number is the fourth coordinate which identifies the exact piece of data.
Q 4 - When a region becomes bigger in size, it
Answer : D
Explanation
The region gets split into small regions when it grows bigger in size.
Q 5 - When a map tasks in a mapreduce job reads from the Hbase table, it reads from
Answer : D
Explanation
Each map tasks reading a Hbase table reads from a region.
Q 6 - Which of the following is declared during the schema definition creation?
Answer : A
Explanation
The column families are declared upfront during the schema definition creation. But the column names can be declared anytime when the Table is up and running.
Q 7 - Hbase can store
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
Answer : A
Explanation
The observer type of coprocessor is executed when an event occurs.
Q 9 - If a region directory does not have .tmp directory then
Answer : A
Explanation
No .tmp directory indicates no compaction happened
Q 10 - The Hbase master node orchestrates
Answer : D
Explanation
The Regionservers slaves are managed by the Hbase Master node