CS401-Midterm
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Only instructions allow moving data from memory to memory.
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The extended ASCII has
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The basic function of SCAS instruction is to
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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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In assembly the CX register is used normally as a ______________register.
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assembly the CX register is used normally as a ______________register.
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one RET is executed, it recovers the values from
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After the execution of “PUSH AX” statement
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_______ register holds the address of next instruction is to be executed
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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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When the operand of DIV instruction is of 16 bits then implied dividend will be of
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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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After the execution of instruction “RET ”
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A 32 Bit processor has accumulator of ---------
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In a video memory, each screen location corresponds to
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After the execution of STOSW the CX will be
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When an item is pushed on the decrementing stack, the top of the stack is
18 / 50
One screen location corresponds to a
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JC and JNC test the ____________ flag.
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physical address of the stack is obtained by
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allow changing specific processor behaviors and are used to play with it.
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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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Each screen location corresponds to a word, the lower byte of this word contains ____
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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
26 / 50
If we want to divide a signed number by 2, this operation can better be accomplished by
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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 string manipulation whenever an instruction needs a memory source, which of the following will hold the pointer to it?
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While using STOBS, if DF=1 then
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In the instruction “CMP AX,BX” the contents of
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In STOSB instruction, when DF is Set, SI is
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When a 32 bit number is divided by a 16 bit number, the quotient is of
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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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The maximum parameters a subroutine can receive (with the help of registers) are
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Which bit of the attributes byte represents the blue component of foreground color
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38 / 50
Which mathematical operation is dominant during the execution of SCAS instruction
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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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After the execution of MOVS instruction which of the following registers are updated
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43 / 50
mov ax,5 has
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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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8088 is a 16bit processor with its accumulator and all registers of __________.
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which bit sets the character "blinking" on the screen?
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In the word designated for one screen location, the higher address contains
50 / 50
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The average score is 64%
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