Premium

Cloudera HBase Certification Questions and Answers (Dumps and Practice Questions)



Question : Which of the following is not an attribute of a column family

: Which of the following is not an attribute of a column family
1. Copression
2. Versions
3. TTL
4. BLOCKCACHE
5. Datanode Location




Correct Answer : 5

Following are the attribute for the column family
1. COMPRESSION$
2. VERSIONS
3. TTL
4. BLOCKSIZE
5. IN_MEMORY
6. BLOCKCACHE





Question : Which statement is true about the HBase Cells

: Which statement is true about the HBase Cells
1. Unlimited number of versions of a cell
2. Version are specified using a long integer
3. By default version is current time
4. All 1,2 and 3 re correct
5. Only 2 and 3 are correct




Correct Answer : 4

Table cells are the intersection of a row and column
A {row, column, version} tuple specifies a cell in HBase
Cell content contains uninterpreted bytes
Cells are versioned
Unlimited number of versions of a cell
Version is specified using a long integer
By default, the version is current time - epoch (12pm, 01/01/70)
Versions are stored in decreasing order





Question : By default HBase maintains three versions of a row ?

: By default HBase maintains three versions of a row ?
1. True
2. False



Correct Answer : 1



Related Questions

Question : Which is the correct statemnet to inserting the data in table

t1 and row key r1 and column family fam1

 : Which is the correct statemnet to inserting the data in table
1. put 't1', 'r1', 'fam1:c1', 'value'
2. put 't1', 'r1', 'fam1:c1', 'value', 1274302629663
3. 1 and 2 are correct


Question : Which is the wrong syntex for scan

 : Which is the wrong syntex for scan
1. scan 't1'
2. scan 't1', {COLUMNS => 'fam1:c1'}
3. scan 't1', {COLUMNS => 'fam1:'}
4. scan 't1', {STARTROW => 'r1', LIMIT => 10}
5. scan 't1', {COLUMNS => ':c1'}



Question :

Which of the following is a wrong statement abount count

operation on HBase table
 :
1. Syntex for count is count 'tablename' [, interval]
2. Counting the rows of a large table can be slow
3. The progress will be reported every interval
4. None of the 1,2 and 3
5. Only 1 and 2





Question :

Which of the correct syntex to delete all the rows of a table

 :
1. deleteall 't1'
2. truncate 'tablename'
3. deleteall 't1', 'r1'
4. None of the above



Question :

Select the correct syntex for deleting the a column in a row
 :
1. deleteall 't1', 'r1'
2. deleteall 't1'
3. delete 't1', 'r1', 'fam1:c1'
4. none of the above



Question : Select the syntex to delete the entire row of the table


 : Select the syntex to delete the entire row of the table
1. deleteall 't1', 'r1'
2. deleteall 't1'
3. deleteall
4. None of the above