Computer organization mcqs accessing io devices
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In memory-mapped I/O .....
The I/O devices and the memory share the same address space
The I/O devices have a separate address space
The memory and I/O devices have an associated address space
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.
The usual BUS structure used to connect the I/O devices is .....
Star BUS structure
Multiple BUS structure
Single BUS structure
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.
In intel's IA-32 architecture there is a separate 16 bit address space for the I/O devices.
Question 3 Explanation:
This type of access is called as I/O mapped devices.
The advantage of I/O mapped devices to memory mapped is .....
The former offers faster transfer of data
The devices connected using I/O mapping have a bigger buffer space
The devices have to deal with fewer address lines
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.
The system is notified of a read or write operation by .....
Appending an extra bit of the address
Enabling the read or write bits of the devices
Raising an appropriate interrupt signal
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.