CS401-Midterm
1 / 50
All the addressing mechanisms iniAPX88 return a number called ______ address.
2 / 50
An offset alone is not complete without
3 / 50
The clear screen operation initialize whole block of memory
4 / 50
Which mathematical operation is dominant during the execution of SCAS instruction
5 / 50
Which bit of the attributes byte represents the red component of background color ?
6 / 50
The maximum parameters a subroutine can receive (with the help of registers) are
7 / 50
After the execution of SAR instruction:
8 / 50
REP will always
9 / 50
_______ register holds the address of next instruction is to be executed
10 / 50
The second byte in the word designated for screen location holds
11 / 50
All the addressing mechanisms in iAPX88 return a number called _____________ address.
12 / 50
When a 32 bit number is divided by a 16 bit number, the quotient is of
13 / 50
The iAPX888 architecture consists of _______ register.
14 / 50
After the execution of STOSW, the CX will be
15 / 50
When a 32 bit number is divided by a 16 bit number, the quotient will be stored in
16 / 50
The physical address of the stack is obtained by
17 / 50
The execution of the instruction “mov word [ES: DI], 0x0720”
18 / 50
Regarding assembler, which statement is true:
19 / 50
When two 16bit numbers are added the answer can be 17 bits long, this extra bit that won’t fit in the target register is placed in the where it can be used and tested
20 / 50
The execution of the instruction “mov word [ES : 0], 0x0741” will print character “A” on screen , background color of the screen will be
21 / 50
“Far” jump is not position relative but is _______________
22 / 50
Stack is a ______ that behaves in a first in last out manner.
23 / 50
In the instruction “CMP AX,BX” the contents of
24 / 50
The basic function of SCAS instruction is to
25 / 50
If the address of memory location Num1 is 0117 and its content is 0005 then after execution of the instruction “ mov bx, Num1” bx will contain
26 / 50
The execution of the instruction “mov word [ES : 0], 0x0741” will print character “A” on screen, color of the character will be
27 / 50
28 / 50
When the operand of DIV instruction is of 16 bits then implied dividend will be of
29 / 50
In assembly the CX register is used normally as a ______________register.
30 / 50
When an item is pushed on the decrementing stack, the top of the stack is
31 / 50
if ax contains decimal -2 and BX contains decimal 2 then after the execution of instructions: CMP AX, BX ,JA label
32 / 50
33 / 50
| 0 |--›| 1 | 1 | 0 | 1 | 0 | 0 | 0 | --›| C | is a example of ______
34 / 50
physical address of the stack is obtained by
35 / 50
36 / 50
After the execution of STOSW the CX will be
37 / 50
In STOSB instruction, when DF is Set, SI is
38 / 50
After the execution of “PUSH AX” statement
39 / 50
To transfer control back the RET instruction take
40 / 50
After the execution of REP instruction CX will be decremented then which of the following flags will be affected?
41 / 50
Which bit of the attributes byte represents the blue component of background color ?
42 / 50
Each screen location corresponds to a word, the lower byte of this word contains ____
43 / 50
decrements SP (the stack pointer) by two and then transfers a word from the source operand to the top of stack
44 / 50
When a 16 bit number is divided by an 8 bit number, the quotient will be in
45 / 50
46 / 50
Which is the unidirectional bus ?
Control Bus
(II) Data Bus
(III) Address Bus
47 / 50
48 / 50
The execution of the instruction “mov word [ES: 0], 0x0741” will print “A” on the screen, color of the character will be
49 / 50
In the word designated for one screen location, the higher address contains
50 / 50
mov ax,5 has
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