1
GATE CSE 2009
MCQ (Single Correct Answer)
+1
-0.3
A CPU generally handles an interrupt by executing an interrupt service routine
A
As soon as an interrupt is raised
B
By checking the interrupt register at the end of fetch cycle.
C
By checking the interrupt register after finishing the execution of the current instruction.
D
By checking the interrupt register at fixed time intervals.
2
GATE CSE 2007
MCQ (Single Correct Answer)
+1
-0.3
Group-1 contains some $$CPU$$ scheduling algorithms and Group-2 contains some applications. Match entries in Group-1 to entries in Group-2.

Group-1
(P) Gang Scheduling
(Q) Rate Monotonic Scheduling
(R) Fair Share Scheduling

Group-2
(1) Guaranteed Scheduling
(2) Real-time Scheduling
(3) Thread Scheduling

A
$$P - 3,Q - 2,R - 1$$
B
$$P - 1,Q - 2,R - 3$$
C
$$P - 2,Q - 3,R - 1$$
D
$$P - 1,Q - 3,R - 2$$
3
GATE CSE 2007
MCQ (Single Correct Answer)
+1
-0.3
Consider the following statements about user level threads and kernel level threads.

Which one of the following statements is FALSE?

A
Context switch time is longer for kernel level threads than for user level threads.
B
User level threads do not need any hardware support.
C
Related kernel level threads can be scheduled on different processors in a multi-processor system.
D
Blocking one kernel level thread blocks all related threads.
4
GATE CSE 2006
MCQ (Single Correct Answer)
+1
-0.3
Consider three $$CPU$$-intensive process, which require $$10,20$$ and $$30$$ time units and arrive at times $$0,2$$ and $$6$$ respectively. How many context switches are needed if the operating system implements a shortest remaining time first scheduling algorithm? Do not count the context switches at time zero and at the end.
A
$$1$$
B
$$2$$
C
$$3$$
D
$$4$$
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