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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