CS401-Midterm
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assembly the CX register is used normally as a ______________register.
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To transfer control back the RET instruction take
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which bit sets the character "blinking" on the screen?
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To convert any digit to its ASCII representation
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The basic function of SCAS instruction is to
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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 screen location corresponds to a
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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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When a 16 bit number is divided by an 8 bit number, the dividend will be in
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All the addressing mechanisms in iAPX88 return a number called _____________ address.
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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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MOV instruction transfers a byte or word from which of the following source location.
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The routine that executes in response to an INT instruction is called
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REP will always
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The maximum parameters a subroutine can receive (with the help of registers) are
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After the execution of MOVS instruction which of the following registers are updated
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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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CMPS instruction subtracts the source location to the destination location. Destination location always lies in
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When an item is pushed on the decrementing stack, the top of the stack is
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Left-Shift-Operation the left most bit _______
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Each screen location corresponds to a word, the lower byte of this word contains ____
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In the instruction MOV AX, 5 the number of operands are
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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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The prevalent convention in most high level languages is stack clearing by the
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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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JC and JNC test the ____________ flag.
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Which bit of the attributes byte represents the red component of background color ?
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“mov byte [num1], 5” is _________ instruction.
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“mov byte [num1],5” is _______ instruction.
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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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allow changing specific processor behaviors and are used to play with it.
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Execution of the instruction “mov word [ES : 0], 0x0741” will print
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The iAPX888 architecture consists of _______ register.
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When the operand of DIV instruction is of 16 bits then implied dividend will be of
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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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All the addressing mechanisms iniAPX88 return a number called ______ address.
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After the execution of STOSW, the CX will be
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The physical address of the stack is obtained by
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After the execution of SAR instruction:
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After the execution of instruction “RET 2”
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Which bit of the attributes byte represents the blue component of background color ?
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After the execution of instruction “RET”
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Which mathematical operation is dominant during the execution of SCAS instruction
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49 / 50
Code Segment is associated to _______ register by default.
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Regarding assembler, which statement is true:
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