CS401-Midterm
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The extended ASCII has
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The prevalent convention in most high level languages is stack clearing by the
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ASCII stands for ____________. The screen is two dimensional space having:
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In a video memory, each screen location corresponds to
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The routine that executes in response to an INT instruction is called
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Which bit of the attributes byte represents the red component of background color ?
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After the execution of “PUSH AX” statement
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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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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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In the instruction MOV AX, 5 the number of operands are
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_______ register holds the address of next instruction is to be executed
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Code Segment is associated to _______ register by default.
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The execution of the instruction “mov word [ES: DI], 0x0720”
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if ax contains decimal -2 and BX contains decimal 2 then after the execution of instructions: CMP AX, BX ,JA label
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RETF will pop the offset in the
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To convert any digit to its ASCII representation
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While using STOBS, if DF=1 then
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In the word designated for one screen location, the higher address contains
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Which is the unidirectional bus ?
Control Bus
(II) Data Bus
(III) Address Bus
22 / 50
In assembly the CX register is used normally as a ______________register.
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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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The iAPX888 architecture consists of _______ register.
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REP will always
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27 / 50
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:
28 / 50
The clear screen operation initialize whole block of memory
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One screen location corresponds to a
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| 0 |--›| 1 | 1 | 0 | 1 | 0 | 0 | 0 | --›| C | is a example of ______
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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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Execution of the instruction “mov word [ES : 0], 0x0741” will print
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8088 is a 16bit processor with its accumulator and all registers of __________.
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Which bit of the attributes byte represents the blue component of background color ?
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36 / 50
To transfer control back the RET instruction take
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All the addressing mechanisms in iAPX88 return a number called _____________ address.
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After the execution of instruction “RET ”
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All the addressing mechanisms iniAPX88 return a number called ______ address.
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41 / 50
The physical address of the stack is obtained by
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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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“Far” jump is not position relative but is _______________
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one RET is executed, it recovers the values from
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The first instruction of “COM” file must be at offset:
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A 32 Bit processor has accumulator of ---------
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JC and JNC test the ____________ flag.
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When an item is pushed on the decrementing stack, the top of the stack is
50 / 50
_________ is one of the reasons due to which string instructions are used in 8088
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