CS401-Midterm
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After the execution of instruction “RET”
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The prevalent convention in most high level languages is stack clearing by the
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To transfer control back the RET instruction take
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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 iAPX888 architecture consists of _______ register.
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“Far” jump is not position relative but is _______________
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The iAPX88 processor supports ___________ modes of memory access.
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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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assembly the CX register is used normally as a ______________register.
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one DIV instruction has
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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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which bit sets the character "blinking" on the screen?
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physical address of the stack is obtained by
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_______ register holds the address of next instruction is to be executed
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REP will always
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After the execution of instruction “RET 2”
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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 basic function of SCAS instruction is to
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Each screen location corresponds to a word, the lower byte of this word contains ____
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MOV instruction transfers a byte or word from which of the following source location.
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The instruction ADC has________ Operand(s)
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To convert any digit to its ASCII representation
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In STOS instruction, the implied source will always be in
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In STOSB instruction, when DF is Set, SI is
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After the execution of STOSW the CX will be
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Regarding assembler, which statement is true:
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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 a video memory, each screen location corresponds to
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Code Segment is associated to _______ register by default.
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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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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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Which of the following options contain the set of instructions to open a window to the video memory?
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one RET is executed, it recovers the values from
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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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One screen location corresponds to a
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After the execution of SAR instruction:
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CMPS instruction subtracts the source location to the destination location. Destination location always lies in
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In assembly the CX register is used normally as a ______________register.
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When an item is pushed on the decrementing stack, the top of the stack is
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All the addressing mechanisms in iAPX88 return a number called _____________ address.
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“mov byte [num1],5” is _______ instruction.
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one Only ___________ instructions allow moving data from memory to memory.
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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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Execution of the instruction “mov word [ES : 0], 0x0741” will print
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When a very large number is divided by very small number so that the quotient is larger than the space provided, this is called
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