CS401-Midterm
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In 8088 architecture, whenever an element is pushed on the stack
2 / 50
After the execution of REP instruction CX will be decremented then which of the following flags will be affected?
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The prevalent convention in most high level languages is stack clearing by the
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The basic function of SCAS instruction is to
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Which bit of the attributes byte represents the blue component of background color ?
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JC and JNC test the ____________ flag.
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which bit sets the character "blinking" on the screen?
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In the instruction “CMP AX,BX” the contents of
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In a video memory, each screen location corresponds to
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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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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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one RET is executed, it recovers the values from
13 / 50
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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All the addressing mechanisms in iAPX88 return a number called _____________ address.
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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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When a 16 bit number is divided by an 8 bit number, the dividend will be in
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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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Which of the following options contain the set of instructions to open a window to the video memory?
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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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Each screen location corresponds to a word, the lower byte of this word contains ____
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The second byte in the word designated for screen location holds
24 / 50
Which is the unidirectional bus ?
Control Bus
(II) Data Bus
(III) Address Bus
25 / 50
CMPS instruction subtracts the source location to the destination location. Destination location always lies in
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The physical address of the stack is obtained by
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28 / 50
one DIV instruction has
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To convert any digit to its ASCII representation
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An offset alone is not complete without
31 / 50
Assembly language is:
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In assembly the CX register is used normally as a ______________register.
33 / 50
When an item is pushed on the decrementing stack, the top of the stack is
34 / 50
When a 16 bit number is divided by an 8 bit number, the quotient will be in
35 / 50
Which bit of the attributes byte represents the red component of background color ?
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The maximum parameters a subroutine can receive (with the help of registers) are
37 / 50
Code Segment is associated to _______ register by default.
38 / 50
The routine that executes in response to an INT instruction is called
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40 / 50
Left-Shift-Operation the left most bit _______
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8088 is a 16bit processor with its accumulator and all registers of __________.
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43 / 50
The clear screen operation initialize whole block of memory
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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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physical address of the stack is obtained by
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The second byte in the word designated for one screen location holds
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49 / 50
After the execution of SAR instruction:
50 / 50
Your score is
The average score is 64%
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