1. DMA is the abbreviation of -----------------
(A) Discrete memory access
(B) Double memory access
(C) None of all
(D) Direct memory access
2. 8255 is a --------------------
(A) Programmable Peripheral Interface
(B) Programmable interrupt controller
(C) Programmable Keyboard/Display Interface
(D) Programmable Interval Timer
3. In 8255, -------- mode provides simple input and output operations for each of the three ports.
(A) Mode-2
(B) Mode-1
(C) Mode-0
(D) None of all
4. The data bus of 8255 is --------- bit.
(A) 16
(B) 8
(C) 4
(D) 2