1
GATE CSE 2013
+1
-0.3
A scheduling algorithm assigns priority proportional to the waiting time of a process. Every process starts with priority zero (the lowest priority). The scheduler re-evaluates the process priorities every $$T$$ time units and decides the next process to schedule. Which one of the following is TRUE if the processes have no $${\rm I}/O$$ operations and all arrive at time zero?
A
This algorithm is equivalent to the first-come-first-serve algorithm.
B
This algorithm is equivalent to the round-robin algorithm.
C
This algorithm is equivalent to the shortest-job-first algorithm.
D
This algorithm is equivalent to the shortest-remaining-time-first algorithm.
2
GATE CSE 2012
+1
-0.3
A process executes the code
fork $$\left( {\,\,\,} \right);$$
fork $$\left( {\,\,\,} \right);$$
fork $$\left( {\,\,\,} \right);$$
The total number of child processes created is
A
$$3$$
B
$$4$$
C
$$7$$
D
$$8$$
3
GATE CSE 2011
+1
-0.3
A Computer handles several interrupt sources of which the following are relevant for this question:

$$* \,\,\,$$ Interrupt from $$CPU$$ temperature sensor (raises interrupt if $$CPU$$ temperature is too high)

$$* \,\,\,$$ Interrupt from Mouse (raises interrupt if the mouse is moved or a button is pressed)

$$* \,\,\,$$ Interrupt from keyboard (raises interrupt when a key is pressed or release)

$$* \,\,\,$$ Interrupt from Hard Disk (raises interrupt when a disk read is completed)>/p>

Which one these will be handled at the HIGHEST priority?

A
Interrupt from Hard Disk
B
Interrupt from Mouse
C
Interrupt from Keyboard
D
Interrupt from $$CPU$$ temperature sensor.
4
GATE CSE 2011
+1
-0.3
A thread is usually defined as a ''light weight process'' because an operating system $$(OS)$$ maintains smaller data structures for a thread than for a process. In relation to this, which of the following is TRUE?
A
On per-thread basis, the $$OS$$ maintains only $$CPU$$ register state.
B
The $$OS$$ does not maintain a separate stack for each thread
C
On per-thread basis, the $$OS$$ does not maintain virtual memory state.
D
On per-thread basis, the $$OS$$ maintains only scheduling and accounting
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