CS401-Midterm
1 / 50
The execution of the instruction “mov word [ES : 0], 0x0741” will print character “A” on screen, color of the character will be
2 / 50
The execution of the instruction “mov word [ES : 160], 0x1230” will print a character “0” on the screen at
3 / 50
8088 is a 16bit processor with its accumulator and all registers of __________.
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All the addressing mechanisms in iAPX88 return a number called _____________ address.
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After the execution of instruction “RET 2”
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Code Segment is associated to _______ register by default.
7 / 50
When a 16 bit number is divided by an 8 bit number, the quotient will be in
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one Only ___________ instructions allow moving data from memory to memory.
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To transfer control back the RET instruction take
10 / 50
An offset alone is not complete without
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The first instruction of “COM” file must be at offset:
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When an item is pushed on the decrementing stack, the top of the stack is
13 / 50
The routine that executes in response to an INT instruction is called
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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
15 / 50
The prevalent convention in most high level languages is stack clearing by the
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Which bit of the attributes byte represents the blue component of foreground color
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The physical address of the stack is obtained by
18 / 50
decrements SP (the stack pointer) by two and then transfers a word from the source operand to the top of stack
19 / 50
When a 32 bit number is divided by a 16 bit number, the quotient is of
20 / 50
JC and JNC test the ____________ flag.
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22 / 50
if ax contains decimal -2 and BX contains decimal 2 then after the execution of instructions: CMP AX, BX ,JA label
23 / 50
After the execution of “PUSH AX” statement
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Each screen location corresponds to a word, the lower byte of this word contains ____
25 / 50
One screen location corresponds to a
26 / 50
Execution of the instruction “mov word [ES : 0], 0x0741” will print
27 / 50
In assembly the CX register is used normally as a ______________register.
28 / 50
When a 32 bit number is divided by a 16 bit number, the quotient will be stored in
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After execution of JCXZ instruction CX will changed with flag affect.
30 / 50
“mov byte [num1], 5” is _________ instruction.
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The basic function of SCAS instruction is to
32 / 50
Which bit of the attributes byte represents the red component of background color ?
33 / 50
The instruction ADC has________ Operand(s)
34 / 50
RETF will pop the offset in the
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Stack is a ______ that behaves in a first in last out manner.
36 / 50
In the instruction MOV AX, 5 the number of operands are
37 / 50
After the execution of REP instruction CX will be decremented then which of the following flags will be affected?
38 / 50
allow changing specific processor behaviors and are used to play with it.
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41 / 50
assembly the CX register is used normally as a ______________register.
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| 0 |--›| 1 | 1 | 0 | 1 | 0 | 0 | 0 | --›| C | is a example of ______
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The iAPX88 processor supports ___________ modes of memory access.
44 / 50
After the execution of STOSW, the CX will be
45 / 50
“mov byte [num1],5” is _______ instruction.
46 / 50
Which is the unidirectional bus ?
Control Bus
(II) Data Bus
(III) Address Bus
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“Far” jump is not position relative but is _______________
48 / 50
When a 16 bit number is divided by an 8 bit number, the dividend will be in
49 / 50
After the execution of SAR instruction:
50 / 50
Your score is
The average score is 64%
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