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
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The physical address of the stack is obtained by
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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 ---------
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In the instruction MOV AX, 5 the number of operands are
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“mov byte [num1],5” is _______ instruction.
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In STOS instruction, the implied source will always be in
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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
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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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In 8088 architecture, whenever an element is pushed on the stack
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After the execution of instruction “RET”
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| 0 |--›| 1 | 1 | 0 | 1 | 0 | 0 | 0 | --›| C | is a example of ______
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After the execution of STOSW, the CX will be
22 / 50
Left-Shift-Operation the left most bit _______
23 / 50
The extended ASCII has
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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
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After the execution of “PUSH AX” statement
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The iAPX888 architecture consists of _______ register.
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31 / 50
The clear screen operation initialize whole block of memory
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After the execution of MOVS instruction which of the following registers are updated
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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
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36 / 50
To convert any digit to its ASCII representation
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RETF will pop the offset in the
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“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.
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When a 32 bit number is divided by a 16 bit number, the quotient will be stored in
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When a very large number is divided by very small number so that the quotient is larger than the space provided, this is called
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Stack is a ______ that behaves in a first in last out manner.
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When the operand of DIV instruction is of 16 bits then implied dividend will be of
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50 / 50
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