CS401-Midterm
1 / 50
Which of the following options contain the set of instructions to open a window to the video memory?
2 / 50
assembly the CX register is used normally as a ______________register.
3 / 50
one RET is executed, it recovers the values from
4 / 50
which bit sets the character "blinking" on the screen?
5 / 50
Stack is a ______ that behaves in a first in last out manner.
6 / 50
To convert any digit to its ASCII representation
7 / 50
When a 32 bit number is divided by a 16 bit number, the quotient will be stored in
8 / 50
Left-Shift-Operation the left most bit _______
9 / 50
Which mathematical operation is dominant during the execution of SCAS instruction
10 / 50
Which bit of the attributes byte represents the blue component of foreground color
11 / 50
The execution of the instruction “mov word [ES: DI], 0x0720”
12 / 50
8088 is a 16bit processor with its accumulator and all registers of __________.
13 / 50
REP will always
14 / 50
Assembly language is:
15 / 50
The execution of the instruction “mov word [ES : 0], 0x0741” will print character “A” on screen , background color of the screen will be
16 / 50
In a video memory, each screen location corresponds to
17 / 50
The iAPX888 architecture consists of _______ register.
18 / 50
The second byte in the word designated for one screen location holds
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
When a 16 bit number is divided by an 8 bit number, the quotient will be in
21 / 50
The routine that executes in response to an INT instruction is called
22 / 50
In the instruction MOV AX, 5 the number of operands are
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24 / 50
One screen location corresponds to a
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The extended ASCII has
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27 / 50
The iAPX88 processor supports ___________ modes of memory access.
28 / 50
An offset alone is not complete without
29 / 50
When an item is pushed on the decrementing stack, the top of the stack is
30 / 50
In assembly the CX register is used normally as a ______________register.
31 / 50
32 / 50
Which bit of the attributes byte represents the red component of background color ?
33 / 50
“mov byte [num1],5” is _______ instruction.
34 / 50
In STOS instruction, the implied source will always be in
35 / 50
All the addressing mechanisms iniAPX88 return a number called ______ address.
36 / 50
After the execution of REP instruction CX will be decremented then which of the following flags will be affected?
37 / 50
In STOSB instruction, when DF is Set, SI is
38 / 50
After the execution of STOSW the CX will be
39 / 50
Regarding assembler, which statement is true:
40 / 50
decrements SP (the stack pointer) by two and then transfers a word from the source operand to the top of stack
41 / 50
Which is the unidirectional bus ?
Control Bus
(II) Data Bus
(III) Address Bus
42 / 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
43 / 50
To transfer control back the RET instruction take
44 / 50
All the addressing mechanisms in iAPX88 return a number called _____________ address.
45 / 50
physical address of the stack is obtained by
46 / 50
47 / 50
The physical address of the stack is obtained by
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49 / 50
CMPS instruction subtracts the source location to the destination location. Destination location always lies in
50 / 50
When a very large number is divided by very small number so that the quotient is larger than the space provided, this is called
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