题目内容

Under multiprogramming, turnaround time for short jobs is usually ________ and that for long jobs is slightly ___________

A. Lengthened; Shortened
B. Shortened; Lengthened
C. Shortened; Shortened
D. Shortened; Unchanged

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Which of the following statements are true?

A. I only
B. I and III only
C. II and III only
D. I, II and III

Which is the most optimal scheduling algorithm?

A. FCFS – First come First served
B. SJF – Shortest Job First
C. RR – Round Robin
D. None of the mentione

The real difficulty with SJF in short term scheduling is ____________

A. it is too good an algorithm
B. knowing the length of the next CPU request
C. it is too complex to understand
D. none of the mentioned

The FCFS algorithm is particularly troublesome for ____________

A. time sharing systems
B. multiprogramming systems
C. multiprocessor systems
D. operating systems

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