CS401-Midterm
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In a video memory, each screen location corresponds to
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The basic function of SCAS instruction is to
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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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Left-Shift-Operation the left most bit _______
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“mov byte [num1], 5” is _________ instruction.
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Which bit of the attributes byte represents the red component of background color ?
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The physical address of the stack is obtained by
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Assembly language is:
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In assembly the CX register is used normally as a ______________register.
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In the word designated for one screen location, the higher address contains
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To transfer control back the RET instruction take
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An offset alone is not complete without
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To convert any digit to its ASCII representation
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one RET is executed, it recovers the values from
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which bit sets the character "blinking" on the screen?
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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 the instruction “CMP AX,BX” the contents of
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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 extended ASCII has
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ASCII stands for ____________. The screen is two dimensional space having:
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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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The iAPX888 architecture consists of _______ register.
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Stack is a ______ that behaves in a first in last out manner.
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The routine that executes in response to an INT instruction is called
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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 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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When a 16 bit number is divided by an 8 bit number, the dividend will be in
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REP will always
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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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When an item is pushed on the decrementing stack, the top of the stack is
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A 32 Bit processor has accumulator of ---------
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JC and JNC test the ____________ flag.
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Which bit of the attributes byte represents the blue component of background color ?
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Execution of the instruction “mov word [ES : 0], 0x0741” will print
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After execution of JCXZ instruction CX will changed with flag affect.
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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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In the instruction MOV AX, 5 the number of operands are
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Which mathematical operation is dominant during the execution of SCAS instruction
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Which bit of the attributes byte represents the blue component of foreground 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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