The default value in seconds in the system variable ‘long_query_time’ is ______________
(a) 5
(b) 10
(c) 20
(d) 60
(a) 5
(b) 10
(c) 20
(d) 60
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Right option is (b) 10
The explanation is: The server maintains a ‘long_query_time’ system variable that defines slow queries (10 seconds by default). If a query takes more than these seconds of real time it is considered slow.