Question
What does the expression 'if(now()=sysdate(),sleep(15),0)' do in a programming context?
It resets the system date to the current date after 15 seconds
It checks if the current time matches a stored system date and then pauses for 15 seconds
It pauses execution for 15 seconds if the current date and time are the same as the system date and time
It pauses execution for 15 seconds if the current date is the system's date
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