CS401-Midterm
1 / 50
While using STOBS, if DF=1 then
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one RET is executed, it recovers the values from
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The iAPX888 architecture consists of _______ register.
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To transfer control back the RET instruction take
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which bit sets the character "blinking" on the screen?
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When an item is pushed on the decrementing stack, the top of the stack is
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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 STOSW the CX will be
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mov ax,5 has
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The second byte in the word designated for screen location holds
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After the execution of MOVS instruction which of the following registers are updated
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The first instruction of “COM” file must be at offset:
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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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One screen location corresponds to a
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In a video memory, each screen location corresponds to
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After the execution of instruction “RET”
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physical address of the stack is obtained by
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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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Stack is a ______ that behaves in a first in last out manner.
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Which bit of the attributes byte represents the blue component of background color ?
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Each screen location corresponds to a word, the lower byte of this word contains ____
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23 / 50
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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ASCII stands for ____________. The screen is two dimensional space having:
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The physical address of the stack is obtained by
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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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Which is the unidirectional bus ?
Control Bus
(II) Data Bus
(III) Address Bus
29 / 50
In 8088 architecture, whenever an element is pushed on the stack
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31 / 50
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 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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To convert any digit to its ASCII representation
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Only instructions allow moving data from memory to memory.
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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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Assembly language is:
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“mov byte [num1], 5” is _________ instruction.
40 / 50
The instruction ADC has________ Operand(s)
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“Far” jump is not position relative but is _______________
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REP will always
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8088 is a 16bit processor with its accumulator and all registers of __________.
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Which bit of the attributes byte represents the blue component of foreground color
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46 / 50
In the instruction “CMP AX,BX” the contents of
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_______ register holds the address of next instruction is to be executed
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All the addressing mechanisms in iAPX88 return a number called _____________ address.
49 / 50
When a 32 bit number is divided by a 16 bit number, the quotient is of
50 / 50
In STOS instruction, the implied source will always be in
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