CS401-Midterm
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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
3 / 50
one DIV instruction has
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Regarding assembler, which statement is true:
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The clear screen operation initialize whole block of memory
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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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In string manipulation whenever an instruction needs a memory source, which of the following will hold the pointer to it?
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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
10 / 50
All the addressing mechanisms iniAPX88 return a number called ______ address.
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allow changing specific processor behaviors and are used to play with it.
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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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When a 16 bit number is divided by an 8 bit number, the quotient will be in
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All the addressing mechanisms in iAPX88 return a number called _____________ address.
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After the execution of STOSW, the CX will be
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After the execution of SAR instruction:
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The second byte in the word designated for one screen location holds
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When an item is pushed on the decrementing stack, the top of the stack is
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Each screen location corresponds to a word, the lower byte of this word contains ____
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_______ register holds the address of next instruction is to be executed
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MOV instruction transfers a byte or word from which of the following source location.
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Which bit of the attributes byte represents the blue component of background color ?
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If the direction of the processing of a string is from higher addresses towards lower addresses then
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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
25 / 50
In 8088 architecture, whenever an element is pushed on the stack
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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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“mov byte [num1], 5” is _________ instruction.
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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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In the instruction MOV AX, 5 the number of operands are
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Left-Shift-Operation the left most bit _______
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JC and JNC test the ____________ flag.
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A 32 Bit processor has accumulator of ---------
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When a 32 bit number is divided by a 16 bit number, the quotient is of
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While using STOBS, if DF=1 then
37 / 50
When two 16bit numbers are added the answer can be 17 bits long, this extra bit that won’t fit in the target register is placed in the where it can be used and tested
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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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In STOSB instruction, when DF is Set, SI is
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To convert any digit to its ASCII representation
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CMPS instruction subtracts the source location to the destination location. Destination location always lies in
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In assembly the CX register is used normally as a ______________register.
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Which bit of the attributes byte represents the red component of background color ?
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REP will always
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The prevalent convention in most high level languages is stack clearing by the
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To transfer control back the RET instruction take
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_________ is one of the reasons due to which string instructions are used in 8088
50 / 50
In a video memory, each screen location corresponds to
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