CS401-Midterm
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The execution of the instruction “mov word [ES: 0], 0x0741” will print “A” on the screen, color of the character will be
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Which bit of the attributes byte represents the red component of background color ?
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Regarding assembler, which statement is true:
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8088 is a 16bit processor with its accumulator and all registers of __________.
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The first instruction of “COM” file must be at offset:
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physical address of the stack is obtained by
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If we want to divide a signed number by 2, this operation can better be accomplished by
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When the operand of DIV instruction is of 16 bits then implied dividend will be of
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All the addressing mechanisms iniAPX88 return a number called ______ address.
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Which mathematical operation is dominant during the execution of SCAS instruction
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Each screen location corresponds to a word, the lower byte of this word contains ____
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In the instruction “CMP AX,BX” the contents of
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When an item is pushed on the decrementing stack, the top of the stack is
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In assembly the CX register is used normally as a ______________register.
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mov ax,5 has
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Only instructions allow moving data from memory to memory.
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After the execution of STOSW, the CX will be
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The physical address of the stack is obtained by
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Which of the following options contain the set of instructions to open a window to the video memory?
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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
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one DIV instruction has
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23 / 50
CMPS instruction subtracts the source location to the destination location. Destination location always lies in
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In STOS instruction, the implied source will always be in
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After the execution of instruction “RET ”
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After the execution of REP instruction CX will be decremented then which of the following flags will be affected?
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A 32 Bit processor has accumulator of ---------
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30 / 50
All the addressing mechanisms in iAPX88 return a number called _____________ address.
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The iAPX888 architecture consists of _______ 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
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34 / 50
The second byte in the word designated for screen location holds
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ASCII stands for ____________. The screen is two dimensional space having:
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To convert any digit to its ASCII representation
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38 / 50
One screen location corresponds to a
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assembly the CX register is used normally as a ______________register.
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JC and JNC test the ____________ flag.
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After the execution of “PUSH AX” statement
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After the execution of SAR instruction:
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44 / 50
The routine that executes in response to an INT instruction is called
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Which is the unidirectional bus ?
Control Bus
(II) Data Bus
(III) Address Bus
46 / 50
MOV instruction transfers a byte or word from which of the following source location.
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48 / 50
The execution of the instruction “mov word [ES : 0], 0x0741” will print character “A” on screen, color of the character will be
49 / 50
In the Rotate Right Operation every bit moves one position to right and the bit dropped from the right is inserted at the left and:
50 / 50
Left-Shift-Operation the left most bit _______
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