Operating System (OS)
If you do not know which version of MS-DOS you are working with, which command will you use after having booted your operating system?

DISK command
None of these
FORMAT command
VER command
DIR command

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Operating System (OS)
The FIFO algorithm

executes first the job that last entered the queue
None of these
executes first the job with the least processor needs
executes first the job that first entered the queue
execute first the job that has been in the queue the longest

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