CS401-Midterm
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The instruction ADC has________ Operand(s)
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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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RETF will pop the offset in the
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Which is the unidirectional bus ?
Control Bus
(II) Data Bus
(III) Address Bus
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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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When an item is pushed on the decrementing stack, the top of the stack is
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The execution of the instruction “mov word [ES: DI], 0x0720”
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In STOSB instruction, when DF is Set, SI is
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The physical address of the stack is obtained by
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Execution of the instruction “mov word [ES : 0], 0x0741” will print
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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 “PUSH AX” statement
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The basic function of SCAS instruction is to
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After the execution of MOVS instruction which of the following registers are updated
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Each screen location corresponds to a word, the lower byte of this word contains ____
19 / 50
In assembly the CX register is used normally as a ______________register.
20 / 50
Which mathematical operation is dominant during the execution of SCAS instruction
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After the execution of instruction “RET ”
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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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Left-Shift-Operation the left most bit _______
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one Only ___________ instructions allow moving data from memory to memory.
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MOV instruction transfers a byte or word from which of the following source location.
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The first instruction of “COM” file must be at offset:
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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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After the execution of SAR instruction:
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In the word designated for one screen location, the higher address contains
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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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one RET is executed, it recovers the values from
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The second byte in the word designated for screen location holds
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After the execution of instruction “RET 2”
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REP will always
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39 / 50
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
40 / 50
The clear screen operation initialize whole block of memory
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physical address of the stack is obtained by
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Stack is a ______ that behaves in a first in last out manner.
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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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While using STOBS, if DF=1 then
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The routine that executes in response to an INT instruction is called
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The maximum parameters a subroutine can receive (with the help of registers) are
50 / 50
The execution of the instruction “mov word [ES : 160], 0x1230” will print a character “0” on the screen at
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