Noun Exam Past Questions and Answers: CIT411 – Microcomputers And Microprocessors
NATIONAL OPEN UNIVERSITY OF NIGERIA
14-16 AHMADU BELLO WAY, VICTORIA ISLAND LAGOS
SEPTEMBER/OCTOBER 2016 EXAMINATION
SCHOOL OF SCIENCE AND TECHNOLOGY
COURSE CODE: CIT411
COURSE TITLE: MICROCOMPUERS AND MICROPROCESSORS
INSTRUCTION: Answer Question 1 and any other three.
Time: 2 HOURS
1.
Write a brief note on each of the following:
VLSI technology
RISC processor
ALU
Distinguish between Von Neumann and Harvard arch tectures.
2.
For a microprocessor briefly describe th e following features:
Word‐size
Processing speed
Instruction set
Memory
Distinguish between independent I/Oan d memory‐mapped I/O.
3.
a.Distinguish between machine languagendassembly language.
Write a brief note on each of the following:
Assembler directive
Subroutine
Instruction
4.
a. Briefly describe what Direct Memory Ac ess (DMA) is.
b. Distinguish between Instruction Set Architecture and Micro architecture.
5.
Write brief notes on the following:
Accumulator
Program counter
Stack pointer
Write down the full interpretation of the following instructions:
MOV R2, #80h
POP 0h
ADD A, #25h
INC R7
6.
Briefly describe what an interrupt is, and explain what happens when it is triggered.
Write brief notes on the following:
Opcode
Operand
Address Bus
Data Bus
