CS401-Midterm
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_________ is one of the reasons due to which string instructions are used in 8088
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Execution of the instruction “mov word [ES : 0], 0x0741” will print
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In STOS instruction, the implied source will always be in
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The routine that executes in response to an INT instruction is called
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One screen location corresponds to a
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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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CMPS instruction subtracts the source location to the destination location. Destination location always lies in
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In the word designated for one screen location, the higher address contains
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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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When an item is pushed on the decrementing stack, the top of the stack is
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All the addressing mechanisms in iAPX88 return a number called _____________ address.
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The first instruction of “COM” file must be at offset:
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In a video memory, each screen location corresponds to
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In assembly the CX register is used normally as a ______________register.
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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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one RET is executed, it recovers the values from
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REP will always
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When a 32 bit number is divided by a 16 bit number, the quotient is of
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“Far” jump is not position relative but is _______________
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After the execution of MOVS instruction which of the following registers are updated
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To convert any digit to its ASCII representation
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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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In the instruction “CMP AX,BX” the contents of
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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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The prevalent convention in most high level languages is stack clearing by the
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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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After the execution of SAR instruction:
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When the operand of DIV instruction is of 16 bits then implied dividend will be of
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In 8088 architecture, whenever an element is pushed on the stack
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To transfer control back the RET instruction take
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Only instructions allow moving data from memory to memory.
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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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After execution of JCXZ instruction CX will changed with flag affect.
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After the execution of “PUSH AX” statement
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After the execution of instruction “RET 2”
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Regarding assembler, which statement is true:
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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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The execution of the instruction “mov word [ES: DI], 0x0720”
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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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In STOSB instruction, when DF is Set, SI is
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8088 is a 16bit processor with its accumulator and all registers of __________.
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Stack is a ______ that behaves in a first in last out manner.
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49 / 50
decrements SP (the stack pointer) by two and then transfers a word from the source operand to the top of stack
50 / 50
After the execution of STOSW the CX will be
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