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Operating Systems Concepts - Engineering

Q1:

The FIFO algorithm

A executes first the job that last entered the queue

B executes first the job that first entered the queue

C execute first the job that has been in the queue the longest

D executes first the job with the least processor needs

E None of the above

ANS:B - executes first the job that first entered the queue

Well [B] is obviously the correct option, but [C] can also be correct because the job that entered first will be the longest waiting job.