CS401-Midterm
1 / 50
“mov byte [num1],5” is _______ instruction.
2 / 50
The extended ASCII has
3 / 50
Which is the unidirectional bus ?
Control Bus
(II) Data Bus
(III) Address Bus
4 / 50
The execution of the instruction “mov word [ES : 0], 0x0741” will print character “A” on screen , background color of the screen will be
5 / 50
In the instruction “CMP AX,BX” the contents of
6 / 50
In assembly the CX register is used normally as a ______________register.
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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
8 / 50
The second byte in the word designated for screen location holds
9 / 50
The iAPX888 architecture consists of _______ register.
10 / 50
The maximum parameters a subroutine can receive (with the help of registers) are
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8088 is a 16bit processor with its accumulator and all registers of __________.
12 / 50
One screen location corresponds to a
13 / 50
After the execution of instruction “RET 2”
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After the execution of “PUSH AX” statement
15 / 50
The execution of the instruction “mov word [ES : 160], 0x1230” will print a character “0” on the screen at
16 / 50
After the execution of SAR instruction:
17 / 50
The execution of the instruction “mov word [ES: 0], 0x0741” will print “A” on the screen, color of the character will be
18 / 50
To transfer control back the RET instruction take
19 / 50
20 / 50
In STOS instruction, the implied source will always be in
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The basic function of SCAS instruction is to
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The execution of the instruction “mov word [ES: DI], 0x0720”
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When an item is pushed on the decrementing stack, the top of the stack is
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if ax contains decimal -2 and BX contains decimal 2 then after the execution of instructions: CMP AX, BX ,JA label
25 / 50
In a video memory, each screen location corresponds to
26 / 50
Which of the following options contain the set of instructions to open a window to the video memory?
27 / 50
If the direction of the processing of a string is from higher addresses towards lower addresses then
28 / 50
When a 16 bit number is divided by an 8 bit number, the dividend will be in
29 / 50
one Only ___________ instructions allow moving data from memory to memory.
30 / 50
Regarding assembler, which statement is true:
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assembly the CX register is used normally as a ______________register.
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33 / 50
When a 16 bit number is divided by an 8 bit number, the quotient will be in
34 / 50
REP will always
35 / 50
If we want to divide a signed number by 2, this operation can better be accomplished by
36 / 50
Which mathematical operation is dominant during the execution of SCAS instruction
37 / 50
A 32 Bit processor has accumulator of ---------
38 / 50
After the execution of STOSW, the CX will be
39 / 50
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41 / 50
After execution of JCXZ instruction CX will changed with flag affect.
42 / 50
The instruction ADC has________ Operand(s)
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When a 32 bit number is divided by a 16 bit number, the quotient will be stored in
44 / 50
one RET is executed, it recovers the values from
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47 / 50
The first instruction of “COM” file must be at offset:
48 / 50
After the execution of REP instruction CX will be decremented then which of the following flags will be affected?
49 / 50
Each screen location corresponds to a word, the lower byte of this word contains ____
50 / 50
_________ is one of the reasons due to which string instructions are used in 8088
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