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Hadoop
Hbase
Quiz 1
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Q.1
Correct and valid syntax for count command is ____________
a) count ‘<row number>’
b) count ‘<table name>’
c) count ‘<column name>’
d) none of the mentioned
Q.2
The minimum number of row versions to keep is configured per column family via _____________
a) HBaseDecriptor
b) HTabDescriptor
c) HColumnDescriptor
d) All of the mentioned
Q.3
Point out the correct statement.
a) The default for max versions is 1
b) It is recommended setting the number of max versions to an exceedingly high level
c) HBase does overwrite row values
d) All of the mentioned
Q.4
HBase supports a ____________ interface via Put and Result.
a) “bytes-in/bytes-out”
b) “bytes-in”
c) “bytes-out”
d) none of the mentioned
Q.5
One supported data type that deserves special mention are ____________
a) money
b) counters
c) smallint
d) tinyint
Q.6
Point out the wrong statement.
a) Where time-ranges are very wide (e.g., year-long report) and where the data is voluminous, summary tables are a common approach
b) Coprocessors act like RDBMS triggers
c) HBase does not currently support ‘constraints’ in traditional (SQL) database parlance
d) None of the mentioned
Q.7
The _________ suffers from the monotonically increasing rowkey problem.
a) rowkey
b) columnkey
c) counterkey
d) all of the mentioned
Q.8
__________ does re-write data and pack rows into columns for certain time-periods.
a) OpenTS
b) OpenTSDB
c) OpenTSD
d) OpenDB
Q.9
Which command is used to disable all the tables matching the given regex?
a) remove all
b) drop all
c) disable_all
d) all of the mentioned
Q.10
__________ command disables drops and recreates a table.
a) drop
b) truncate
c) delete
d) none of the mentioned
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