CS401-Midterm
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_________ is one of the reasons due to which string instructions are used in 8088
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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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The prevalent convention in most high level languages is stack clearing by the
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_______ register holds the address of next instruction is to be executed
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Regarding assembler, which statement is true:
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The iAPX888 architecture consists of _______ register.
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The maximum parameters a subroutine can receive (with the help of registers) are
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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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The first instruction of “COM” file must be at offset:
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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 STOS instruction, the implied source will always be in
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The second byte in the word designated for one screen location holds
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An offset alone is not complete without
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16 / 50
The extended ASCII has
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When an item is pushed on the decrementing stack, the top of the stack is
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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 clear screen operation initialize whole block of memory
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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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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 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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In a video memory, each screen location corresponds to
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“mov byte [num1], 5” is _________ instruction.
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“mov byte [num1],5” is _______ instruction.
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The routine that executes in response to an INT instruction is called
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31 / 50
The execution of the instruction “mov word [ES : 160], 0x1230” will print a character “0” on the screen at
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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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| 0 |--›| 1 | 1 | 0 | 1 | 0 | 0 | 0 | --›| C | is a example of ______
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36 / 50
When a 32 bit number is divided by a 16 bit number, the quotient is of
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A 32 Bit processor has accumulator of ---------
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MOV instruction transfers a byte or word from which of the following source location.
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After the execution of instruction “RET”
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mov ax,5 has
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In the instruction MOV AX, 5 the number of operands are
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43 / 50
Assembly language is:
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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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To transfer control back the RET instruction take
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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 assembly the CX register is used normally as a ______________register.
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8088 is a 16bit processor with its accumulator and all registers of __________.
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50 / 50
All the addressing mechanisms in iAPX88 return a number called _____________ address.
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