CS401-Midterm
1 / 50
8088 is a 16bit processor with its accumulator and all registers of __________.
2 / 50
While using STOBS, if DF=1 then
3 / 50
In a video memory, each screen location corresponds to
4 / 50
In STOS instruction, the implied source will always be in
5 / 50
The second byte in the word designated for one screen location holds
6 / 50
REP will always
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In string manipulation whenever an instruction needs a memory source, which of the following will hold the pointer to it?
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The routine that executes in response to an INT instruction is called
9 / 50
Which mathematical operation is dominant during the execution of SCAS instruction
10 / 50
Left-Shift-Operation the left most bit _______
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The execution of the instruction “mov word [ES : 0], 0x0741” will print character “A” on screen , background color of the screen will be
12 / 50
one DIV instruction has
13 / 50
The execution of the instruction “mov word [ES : 0], 0x0741” will print character “A” on screen, color of the character will be
14 / 50
When a 16 bit number is divided by an 8 bit number, the quotient will be in
15 / 50
Which bit of the attributes byte represents the blue component of foreground color
16 / 50
In the instruction “CMP AX,BX” the contents of
17 / 50
After the execution of MOVS instruction which of the following registers are updated
18 / 50
Execution of the instruction “mov word [ES : 0], 0x0741” will print
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The execution of the instruction “mov word [ES : 160], 0x1230” will print a character “0” on the screen at
20 / 50
In assembly the CX register is used normally as a ______________register.
21 / 50
When an item is pushed on the decrementing stack, the top of the stack is
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decrements SP (the stack pointer) by two and then transfers a word from the source operand to the top of stack
23 / 50
physical address of the stack is obtained by
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To transfer control back the RET instruction take
25 / 50
Each screen location corresponds to a word, the lower byte of this word contains ____
26 / 50
“mov byte [num1], 5” is _________ instruction.
27 / 50
| 0 |--›| 1 | 1 | 0 | 1 | 0 | 0 | 0 | --›| C | is a example of ______
28 / 50
Regarding assembler, which statement is true:
29 / 50
The extended ASCII has
30 / 50
Assembly language is:
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allow changing specific processor behaviors and are used to play with it.
32 / 50
_________ is one of the reasons due to which string instructions are used in 8088
33 / 50
An offset alone is not complete without
34 / 50
All the addressing mechanisms in iAPX88 return a number called _____________ address.
35 / 50
JC and JNC test the ____________ flag.
36 / 50
mov ax,5 has
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40 / 50
MOV instruction transfers a byte or word from which of the following source location.
41 / 50
The iAPX888 architecture consists of _______ register.
42 / 50
Which is the unidirectional bus ?
Control Bus
(II) Data Bus
(III) Address Bus
43 / 50
After the execution of STOSW, the CX will be
44 / 50
45 / 50
The first instruction of “COM” file must be at offset:
46 / 50
In 8088 architecture, whenever an element is pushed on the stack
47 / 50
In STOSB instruction, when DF is Set, SI is
48 / 50
When the operand of DIV instruction is of 16 bits then implied dividend will be of
49 / 50
The instruction ADC has________ Operand(s)
50 / 50
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