CS401-Midterm
1 / 50
When an item is pushed on the decrementing stack, the top of the stack is
2 / 50
An offset alone is not complete without
3 / 50
Which mathematical operation is dominant during the execution of SCAS instruction
4 / 50
Which of the following options contain the set of instructions to open a window to the video memory?
5 / 50
decrements SP (the stack pointer) by two and then transfers a word from the source operand to the top of stack
6 / 50
To transfer control back the RET instruction take
7 / 50
Left-Shift-Operation the left most bit _______
8 / 50
After the execution of STOSW, the CX will be
9 / 50
The physical address of the stack is obtained by
10 / 50
After the execution of instruction “RET 2”
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Which bit of the attributes byte represents the red component of background color ?
12 / 50
The iAPX88 processor supports ___________ modes of memory access.
13 / 50
After the execution of instruction “RET”
14 / 50
one DIV instruction has
15 / 50
In 8088 architecture, whenever an element is pushed on the stack
16 / 50
17 / 50
If we want to divide a signed number by 2, this operation can better be accomplished by
18 / 50
The execution of the instruction “mov word [ES : 0], 0x0741” will print character “A” on screen, color of the character will be
19 / 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
20 / 50
8088 is a 16bit processor with its accumulator and all registers of __________.
21 / 50
Regarding assembler, which statement is true:
22 / 50
The basic function of SCAS instruction is to
23 / 50
Assembly language is:
24 / 50
Which is the unidirectional bus ?
Control Bus
(II) Data Bus
(III) Address Bus
25 / 50
allow changing specific processor behaviors and are used to play with it.
26 / 50
_________ is one of the reasons due to which string instructions are used in 8088
27 / 50
The execution of the instruction “mov word [ES: 0], 0x0741” will print “A” on the screen, color of the character will be
28 / 50
After execution of JCXZ instruction CX will changed with flag affect.
29 / 50
After the execution of REP instruction CX will be decremented then which of the following flags will be affected?
30 / 50
31 / 50
_______ register holds the address of next instruction is to be executed
32 / 50
33 / 50
CMPS instruction subtracts the source location to the destination location. Destination location always lies in
34 / 50
To convert any digit to its ASCII representation
35 / 50
one RET is executed, it recovers the values from
36 / 50
In STOS instruction, the implied source will always be in
37 / 50
which bit sets the character "blinking" on the screen?
38 / 50
39 / 50
The execution of the instruction “mov word [ES : 0], 0x0741” will print character “A” on screen , background color of the screen will be
40 / 50
While using STOBS, if DF=1 then
41 / 50
ASCII stands for ____________. The screen is two dimensional space having:
42 / 50
if ax contains decimal -2 and BX contains decimal 2 then after the execution of instructions: CMP AX, BX ,JA label
43 / 50
The second byte in the word designated for screen location holds
44 / 50
The execution of the instruction “mov word [ES : 160], 0x1230” will print a character “0” on the screen at
45 / 50
Stack is a ______ that behaves in a first in last out manner.
46 / 50
“Far” jump is not position relative but is _______________
47 / 50
REP will always
48 / 50
When a 32 bit number is divided by a 16 bit number, the quotient will be stored in
49 / 50
The extended ASCII has
50 / 50
Your score is
The average score is 64%
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