CS401-Midterm
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A 32 Bit processor has accumulator of ---------
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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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Regarding assembler, which statement is true:
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After the execution of STOSW, the CX will be
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The second byte in the word designated for screen location holds
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The physical address of the stack is obtained by
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one DIV instruction has
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allow changing specific processor behaviors and are used to play with it.
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The basic function of SCAS instruction is to
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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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In STOS instruction, the implied source will always be in
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After the execution of “PUSH AX” statement
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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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Which is the unidirectional bus ?
Control Bus
(II) Data Bus
(III) Address Bus
15 / 50
When a 16 bit number is divided by an 8 bit number, the quotient will be in
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The iAPX888 architecture consists of _______ register.
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All the addressing mechanisms in iAPX88 return a number called _____________ address.
18 / 50
Which bit of the attributes byte represents the red component of background color ?
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ASCII stands for ____________. The screen is two dimensional space having:
20 / 50
The clear screen operation initialize whole block of memory
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In the word designated for one screen location, the higher address contains
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Code Segment is associated to _______ register by default.
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24 / 50
Which of the following options contain the set of instructions to open a window to the video memory?
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REP will always
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After the execution of STOSW the CX will be
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After the execution of instruction “RET ”
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Each screen location corresponds to a word, the lower byte of this word contains ____
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After the execution of instruction “RET”
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mov ax,5 has
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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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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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one RET is executed, it recovers the values from
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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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“mov byte [num1],5” is _______ instruction.
38 / 50
The first instruction of “COM” file must be at offset:
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one Only ___________ instructions allow moving data from memory to memory.
40 / 50
When a 32 bit number is divided by a 16 bit number, the quotient is of
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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: DI], 0x0720”
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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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To convert any digit to its ASCII representation
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| 0 |--›| 1 | 1 | 0 | 1 | 0 | 0 | 0 | --›| C | is a example of ______
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Execution of the instruction “mov word [ES : 0], 0x0741” will print
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After the execution of SAR instruction:
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In 8088 architecture, whenever an element is pushed on the stack
50 / 50
Which bit of the attributes byte represents the blue component of foreground color
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