Computer organization mcqs accessing io devices

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Computer organization mcqs accessing io devices

Question 1 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
In memory-mapped I/O .....
A
The I/O devices and the memory share the same address space
B
The I/O devices have a separate address space
C
The memory and I/O devices have an associated address space
D
A part of the memory is specifically set aside for the I/O operation
Question 1 Explanation: 
Its the different modes of accessing the i/o devices.
Question 2 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The usual BUS structure used to connect the I/O devices is .....
A
Star BUS structure
B
Multiple BUS structure
C
Single BUS structure
D
Node to Node BUS structure
Question 2 Explanation: 
BUS is a collection of address, control and data lines used to connect the various devices of the computer.
Question 3 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
In intel's IA-32 architecture there is a separate 16 bit address space for the I/O devices.
A
False
B
True
Question 3 Explanation: 
This type of access is called as I/O mapped devices.
Question 4 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The advantage of I/O mapped devices to memory mapped is .....
A
The former offers faster transfer of data
B
The devices connected using I/O mapping have a bigger buffer space
C
The devices have to deal with fewer address lines
D
No advantage as such
Question 4 Explanation: 
Since the I/O mapped devices have a separate address space the address lines are limited by the amount of the space allocated.
Question 5 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The system is notified of a read or write operation by .....
A
Appending an extra bit of the address
B
Enabling the read or write bits of the devices
C
Raising an appropriate interrupt signal
D
Sending a special signal along the BUS
Question 5 Explanation: 
It is necessary for the processor to send a signal intimating the request as either read or write.
There are 5 questions to complete.