1
GATE CSE 2022
MCQ (Single Correct Answer)
+1
-0.33

Which one of the following facilitates transfer of bulk data from hard disk to main memory with the highest throughput?

A
DMA based I/O transfer
B
Interrupt driven I/O transfer
C
Polling based I/O transfer
D
Programmed I/O transfer
2
GATE CSE 2011
MCQ (Single Correct Answer)
+1
-0.3
A computer handles several interrupt sources of which of 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 released)
$$ * \,\,\,\,\,\,\,\,\,\,\,$$ Interrupt from Hard Disk (raises interrupt when a disk read is completed)

Which one of 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
3
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.
4
GATE CSE 2005
MCQ (Single Correct Answer)
+1
-0.3
Normally user programs are prevented from handling $${\rm I}/O$$ directly by $${\rm I}/O$$ instructions in them. For $$CPUs$$ having explicit $${\rm I}/O$$ instructions, such $${\rm I}/O$$ protection is ensured by having the $${\rm I}/O$$ instructions privileged. In a $$CPU$$ with memory mapped $${\rm I}/O$$, there is no explicit $${\rm I}/O$$ instruction. Which one of the following is true for a $$CPU$$ with memory mapped $${\rm I}/O$$ ?
A
$${\rm I}/O$$ protection is ensured by operating system routine(s)
B
$${\rm I}/O$$ protection is ensured by a hardware trap
C
$${\rm I}/O$$ protection is ensured during system configuration
D
$${\rm I}/O$$ protection is not possible
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