CS401-Midterm
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Code Segment is associated to _______ register by default.
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Stack is a ______ that behaves in a first in last out manner.
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In 8088 architecture, whenever an element is pushed on the stack
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After the execution of STOSW, the CX will be
5 / 50
Which mathematical operation is dominant during the execution of SCAS instruction
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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
7 / 50
In the instruction MOV AX, 5 the number of operands are
8 / 50
ASCII stands for ____________. The screen is two dimensional space having:
9 / 50
The iAPX88 processor supports ___________ modes of memory access.
10 / 50
When an item is pushed on the decrementing stack, the top of the stack is
11 / 50
Which is the unidirectional bus ?
Control Bus
(II) Data Bus
(III) Address Bus
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13 / 50
Execution of the instruction “mov word [ES : 0], 0x0741” will print
14 / 50
The basic function of SCAS instruction is to
15 / 50
In the instruction “CMP AX,BX” the contents of
16 / 50
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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All the addressing mechanisms in iAPX88 return a number called _____________ address.
18 / 50
To convert any digit to its ASCII representation
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All the addressing mechanisms iniAPX88 return a number called ______ address.
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After the execution of instruction “RET”
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23 / 50
The execution of the instruction “mov word [ES: 0], 0x0741” will print “A” on the screen, color of the character will be
24 / 50
mov ax,5 has
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If the direction of the processing of a string is from higher addresses towards lower addresses then
26 / 50
The physical address of the stack is obtained by
27 / 50
The maximum parameters a subroutine can receive (with the help of registers) are
28 / 50
When a 16 bit number is divided by an 8 bit number, the quotient will be in
29 / 50
One screen location corresponds to a
30 / 50
The first instruction of “COM” file must be at offset:
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32 / 50
8088 is a 16bit processor with its accumulator and all registers of __________.
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_______ register holds the address of next instruction is to be executed
34 / 50
“Far” jump is not position relative but is _______________
35 / 50
The clear screen operation initialize whole block of memory
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37 / 50
Only instructions allow moving data from memory to memory.
38 / 50
Each screen location corresponds to a word, the lower byte of this word contains ____
39 / 50
In assembly the CX register is used normally as a ______________register.
40 / 50
41 / 50
In a video memory, each screen location corresponds to
42 / 50
Which bit of the attributes byte represents the red component of background color ?
43 / 50
To transfer control back the RET instruction take
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45 / 50
While using STOBS, if DF=1 then
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After the execution of instruction “RET ”
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“mov byte [num1], 5” is _________ instruction.
48 / 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:
49 / 50
50 / 50
When a 16 bit number is divided by an 8 bit number, the dividend will be in
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