CS401-Midterm
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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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The iAPX888 architecture consists of _______ register.
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When the operand of DIV instruction is of 16 bits then implied dividend will be of
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The basic function of SCAS instruction is to
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The physical address of the stack is obtained by
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After the execution of “PUSH AX” statement
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one RET is executed, it recovers the values from
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Which mathematical operation is dominant during the execution of SCAS instruction
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All the addressing mechanisms in iAPX88 return a number called _____________ address.
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The routine that executes in response to an INT instruction is called
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When an item is pushed on the decrementing stack, the top of the stack is
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ASCII stands for ____________. The screen is two dimensional space having:
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The clear screen operation initialize whole block of memory
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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 foreground color
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In the Rotate Right Operation every bit moves one position to right and the bit dropped from the right is inserted at the left and:
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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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After execution of JCXZ instruction CX will changed with flag affect.
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The extended ASCII has
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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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If the direction of the processing of a string is from higher addresses towards lower addresses then
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“mov byte [num1],5” is _______ instruction.
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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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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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After the execution of SAR instruction:
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MOV instruction transfers a byte or word from which of the following source location.
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In STOSB instruction, when DF is Set, SI is
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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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REP will always
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Execution of the instruction “mov word [ES : 0], 0x0741” will print
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In 8088 architecture, whenever an element is pushed on the stack
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Assembly language is:
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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
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The first instruction of “COM” file must be at offset:
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allow changing specific processor behaviors and are used to play with it.
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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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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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Stack is a ______ that behaves in a first in last out manner.
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Regarding assembler, which statement is true:
50 / 50
When a 16 bit number is divided by an 8 bit number, the dividend will be in
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