CS401-Midterm
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The basic function of SCAS instruction is to
2 / 50
One screen location corresponds to a
3 / 50
REP will always
4 / 50
The physical address of the stack is obtained by
5 / 50
When a 32 bit number is divided by a 16 bit number, the quotient is of
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A 32 Bit processor has accumulator of ---------
7 / 50
In the instruction MOV AX, 5 the number of operands are
8 / 50
“mov byte [num1],5” is _______ instruction.
9 / 50
In STOS instruction, the implied source will always be in
10 / 50
The second byte in the word designated for screen location holds
11 / 50
Which mathematical operation is dominant during the execution of SCAS instruction
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When a 16 bit number is divided by an 8 bit number, the quotient will be in
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After the execution of SAR instruction:
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To transfer control back the RET instruction take
15 / 50
Execution of the instruction “mov word [ES : 0], 0x0741” will print
16 / 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.
18 / 50
In 8088 architecture, whenever an element is pushed on the stack
19 / 50
After the execution of instruction “RET”
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| 0 |--›| 1 | 1 | 0 | 1 | 0 | 0 | 0 | --›| C | is a example of ______
21 / 50
After the execution of STOSW, the CX will be
22 / 50
Left-Shift-Operation the left most bit _______
23 / 50
The extended ASCII has
24 / 50
The instruction ADC has________ Operand(s)
25 / 50
The first instruction of “COM” file must be at offset:
26 / 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
27 / 50
physical address of the stack is obtained by
28 / 50
After the execution of “PUSH AX” statement
29 / 50
The iAPX888 architecture consists of _______ register.
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31 / 50
The clear screen operation initialize whole block of memory
32 / 50
After the execution of MOVS instruction which of the following registers are updated
33 / 50
All the addressing mechanisms iniAPX88 return a number called ______ address.
34 / 50
CMPS instruction subtracts the source location to the destination location. Destination location always lies in
35 / 50
36 / 50
To convert any digit to its ASCII representation
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RETF will pop the offset in the
38 / 50
“Far” jump is not position relative but is _______________
39 / 50
Which bit of the attributes byte represents the red component of background color ?
40 / 50
Each screen location corresponds to a word, the lower byte of this word contains ____
41 / 50
After execution of JCXZ instruction CX will changed with flag affect.
42 / 50
Code Segment is associated to _______ register by default.
43 / 50
When a 32 bit number is divided by a 16 bit number, the quotient will be stored in
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46 / 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
47 / 50
Stack is a ______ that behaves in a first in last out manner.
48 / 50
When the operand of DIV instruction is of 16 bits then implied dividend will be of
49 / 50
50 / 50
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