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CSCI 480 Operating System Final Review questions with 100- correct answers
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CSCI 480 Operating System Final Review questions with 100- correct answers
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CSCI 480 Operating System FinalReview questions with 100% correct
answers
I/O-bound program typically has many short ______ and a CPU-bound
program might have a few long __________.
a. I/O burst, CPU burst
b. I/O burst, I/O burst
c. CPU burst, CPU burst
d. CPU burst, I/O burst - answer c
Which of the following scheduling algorithms must be
nonpreemptive?
a. SJF
b. RR
c. FCFS
d. priority algorithms - answer c
If the time quantum gets too large, RR scheduling degenerates to
__________?
a. SJF
b. FCFS
c. Shortest-remaining-time-first
d. Multilevel queue - answer b
Which of the following are preemptive scheduling algorithms:
a. FCFS
b. Round Robin
,c. Shortest job first but do not use remaining time.
d. None of the rest
e. All of the rest - answer b
The criteria for CPU scheduling are always compatible. For example,
when you minimize response time, you always maximize
throughput.
a. true
b. false - answer b
A significant problem with priority scheduling algorithms is _____.
a. complexity
b. starvation
c. determining the length of the next CPU burst
d. determining the length of the time quantum - answer b
Although some CPU scheduling criteria are not compatible,
minimizing turnaround time guarantees minimizing response time.
a. true
b. false - answer b
Which of the following circumstances can preemptive scheduling
take place?
a. when a process switches from the running state to the waiting
state
b. when a process switches from the waiting state to the ready
state
c. when a process terminates
d. none of the rest - answer b
, Which of these is NOT included in the PCB?
a. local variable.
b. accounting information.
c. a copy of the program counter.
d. a copy of the registers. - answer a
Virtually all contemporary operating systems support kernel
threads.
a. true
b. false - answer a
Which of the following is true about inter-process communication:
a. ordinary pipe is uni-directional.
b. ordinary pipe is often used for communication between a process
and its child.
c. socket, a communication mechanism in a client-server system, is
a concatenation of an IP address and a port.
d. All of the rest - answer d
Which of the following is NOT a possible situation when a child
process is created?
a. The child process is running concurrently with the parent process.
b. The child process and the parent process are both waiting in a
device queue.
c. The child process and the parent process are both ready.
d. The child process has the same process id as the parent process.
- answer d
Which of the following is true about state transitions of a process:
a. A process in the waiting state can transition to the running state.
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