CS401-Midterm
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One screen location corresponds to a
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The execution of the instruction “mov word [ES : 0], 0x0741” will print character “A” on screen, color of the character will be
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The first instruction of “COM” file must be at offset:
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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
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An offset alone is not complete without
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MOV instruction transfers a byte or word from which of the following source location.
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Execution of the instruction “mov word [ES : 0], 0x0741” will print
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In a video memory, each screen location corresponds to
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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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Which bit of the attributes byte represents the red component of background color ?
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To convert any digit to its ASCII representation
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Which bit of the attributes byte represents the blue component of background color ?
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Which mathematical operation is dominant during the execution of SCAS instruction
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mov ax,5 has
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After the execution of STOSW, the CX will be
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Which is the unidirectional bus ?
Control Bus
(II) Data Bus
(III) Address Bus
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CMPS instruction subtracts the source location to the destination location. Destination location always lies in
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The routine that executes in response to an INT instruction is called
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The iAPX888 architecture consists of _______ register.
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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 basic function of SCAS instruction is to
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decrements SP (the stack pointer) by two and then transfers a word from the source operand to the top of stack
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one RET is executed, it recovers the values from
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When an item is pushed on the decrementing stack, the top of the stack is
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The execution of the instruction “mov word [ES : 160], 0x1230” will print a character “0” on the screen at
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When the operand of DIV instruction is of 16 bits then implied dividend will be of
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assembly the CX register is used normally as a ______________register.
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one Only ___________ instructions allow moving data from memory to memory.
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In string manipulation whenever an instruction needs a memory source, which of the following will hold the pointer to it?
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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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After execution of JCXZ instruction CX will changed with flag affect.
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_______ register holds the address of next instruction is to be executed
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REP will always
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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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Regarding assembler, which statement is true:
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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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When a 32 bit number is divided by a 16 bit number, the quotient will be stored in
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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
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In assembly the CX register is used normally as a ______________register.
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After the execution of MOVS instruction which of the following registers are updated
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When a 16 bit number is divided by an 8 bit number, the dividend will be in
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