Match List I with List II
|
List I |
List II |
|
(A) Handshaking |
(I) I/O interface informs the CPU that device is ready for transfer |
|
(B) Programmed I/O |
(II) requires two control signals working in opposite directions |
|
(C) Interrupt-initiated I/O |
(III) has local memory & control large set of I/O devices. |
|
(D) I/O processor |
(IV) require CPU to check the I/O flag & perform transfer |
Choose the correct answer from the options given below:
1
A - I, B - II, C - 10, D - IV
2
A - II, B - IV, C - III, D - I
3
A - II, B - IV, C - I, D - III
4
A - IV, B - III, C - II, D - I