1
GATE CSE 2003
MCQ (Single Correct Answer)
+2
-0.6
A uni-processor computer system only has two processes, both of which alternate $$10$$ $$ms$$ $$CPU$$ bursts with $$90$$ $$ms$$ $${\rm I}/O$$ bursts. Both the processes were created at nearly the same time. The $${\rm I}/O$$ of both processes can proceed in parallel. Which of the following scheduling strategies will result in the least $$CPU$$ utilization (over a long period of time) for this system?
A
First come First served scheduling
B
Shortest remaining time first scheduling
C
Static priority scheduling with different priorities for the two processes
D
Round robin scheduling with a time quantum of $$5$$ $$ms.$$
2
GATE CSE 2002
Subjective
+2
-0
Draw the process state transition diagram of an $$OS$$ in which
(i) each process is in one of the five states: created, ready, running, blocked (i.e. sleep or wait), or terminated, and
(ii) only non-preemptive scheduling is used by the $$OS.$$ Label the transitions appropriately.
3
GATE CSE 2002
MCQ (Single Correct Answer)
+2
-0.6
Which combination of the following features will suffice to characterize an $$OS$$ as a multi-programmed $$OS?$$
$$(a).$$ More than one program may be loaded into main memory at the same time for execution.
$$(b).$$ If a program waits for certain events such as $$I/O$$, another program is immediately scheduled for execution.
$$(c).$$ If the execution of a program terminates, another program is immediately scheduled for execution.
A
$$a$$
B
$$a$$ and $$b$$
C
$$a$$ and $$c$$
D
$$a, b$$ and $$c$$
4
GATE CSE 2001
MCQ (Single Correct Answer)
+2
-0.6
Which of the following does not interrupt a running process?
A
A device
B
Timer
C
Scheduler process
D
Power failure
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