CS401-Midterm
1 / 50
After the execution of instruction “RET”
2 / 50
which bit sets the character "blinking" on the screen?
3 / 50
When a 16 bit number is divided by an 8 bit number, the quotient will be in
4 / 50
Which bit of the attributes byte represents the red component of background color ?
5 / 50
The second byte in the word designated for one screen location holds
6 / 50
Which mathematical operation is dominant during the execution of SCAS instruction
7 / 50
The iAPX88 processor supports ___________ modes of memory access.
8 / 50
_______ register holds the address of next instruction is to be executed
9 / 50
Execution of the instruction “mov word [ES : 0], 0x0741” will print
10 / 50
In the instruction “CMP AX,BX” the contents of
11 / 50
To convert any digit to its ASCII representation
12 / 50
When an item is pushed on the decrementing stack, the top of the stack is
13 / 50
All the addressing mechanisms iniAPX88 return a number called ______ address.
14 / 50
When the operand of DIV instruction is of 16 bits then implied dividend will be of
15 / 50
After execution of JCXZ instruction CX will changed with flag affect.
16 / 50
The extended ASCII has
17 / 50
After the execution of instruction “RET ”
18 / 50
Each screen location corresponds to a word, the lower byte of this word contains ____
19 / 50
After the execution of REP instruction CX will be decremented then which of the following flags will be affected?
20 / 50
one Only ___________ instructions allow moving data from memory to memory.
21 / 50
Which of the following options contain the set of instructions to open a window to the video memory?
22 / 50
ASCII stands for ____________. The screen is two dimensional space having:
23 / 50
Regarding assembler, which statement is true:
24 / 50
Stack is a ______ that behaves in a first in last out manner.
25 / 50
After the execution of MOVS instruction which of the following registers are updated
26 / 50
Which bit of the attributes byte represents the blue component of foreground color
27 / 50
The second byte in the word designated for screen location holds
28 / 50
The execution of the instruction “mov word [ES: DI], 0x0720”
29 / 50
If we want to divide a signed number by 2, this operation can better be accomplished by
30 / 50
The first instruction of “COM” file must be at offset:
31 / 50
In STOS instruction, the implied source will always be in
32 / 50
The maximum parameters a subroutine can receive (with the help of registers) are
33 / 50
RETF will pop the offset in the
34 / 50
Which bit of the attributes byte represents the blue component of background color ?
35 / 50
one DIV instruction has
36 / 50
After the execution of STOSW the CX will be
37 / 50
REP will always
38 / 50
In a video memory, each screen location corresponds to
39 / 50
After the execution of “PUSH AX” statement
40 / 50
One screen location corresponds to a
41 / 50
In assembly the CX register is used normally as a ______________register.
42 / 50
After the execution of SAR instruction:
43 / 50
Which is the unidirectional bus ?
Control Bus
(II) Data Bus
(III) Address Bus
44 / 50
45 / 50
All the addressing mechanisms in iAPX88 return a number called _____________ address.
46 / 50
The physical address of the stack is obtained by
47 / 50
After the execution of instruction “RET 2”
48 / 50
An offset alone is not complete without
49 / 50
Assembly language is:
50 / 50
Your score is
The average score is 64%
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