COE121 - Q3 (Multiple Choice) Questions and answers

COE121 - Q3 (Multiple
Choice) Questions and
answers
It defines the beginning address of any 64k-byte memory segment.


a. segment address
b. offset address
c. base address
d. return address - answer a. segment address


Address is referred to _____ when the processor's address bus is formed by
some combination of segment register and an additional numerical offset.


a. Effective Address
b. Immediate Addressing
c. Register Addressing
d. Base Addressing - answer a. Effective Address


Given CS = 2000H and IP = 1000H, find the memory address of the next
instruction executed by the microprocessor.


a. 21000H
b. 22000H
c. 2100H
d. 12000H - answer a. 21000H


Which of the following examples is an Immediate Addressing Mode?

, a. MOV AL, FFH
b. MOV AX, [BX+4]
c. MOV [DI-8], BL
d. MOV [500H], AL - answer a. MOV AL, FFH


Real mode memory addressing is the ONLY memory management mode
available to


a. 8086/8088
b. 80286
c. 80386
d. both a and b (8086/8088 and 80286) - answer *c. 80386


If SI = 1000H, what does MOV [SI], BH do?


a. reads byte of data from memory location 1000H
b. wirte byte of data from BH into memory location 1000H
c. illegal, only DI can be used between []'s
d. illegal, mixed register sizes - answer b. writes byte of data from BH into
memory location 1000H


The first 1Mbyte of memory is called the _____


a. unreal mode
b. conventional
c. real mode
d. both b and c - answer d. both b and c (conventional and real mode)


Which of the following is an example of Relative program addressing?