CS401-Midterm
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A 32 Bit processor has accumulator of ---------
2 / 50
To convert any digit to its ASCII representation
3 / 50
To transfer control back the RET instruction take
4 / 50
Regarding assembler, which statement is true:
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After the execution of instruction “RET 2”
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7 / 50
REP will always
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9 / 50
The first instruction of “COM” file must be at offset:
10 / 50
The execution of the instruction “mov word [ES: DI], 0x0720”
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Execution of the instruction “mov word [ES : 0], 0x0741” will print
12 / 50
The maximum parameters a subroutine can receive (with the help of registers) are
13 / 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:
14 / 50
_________ is one of the reasons due to which string instructions are used in 8088
15 / 50
One screen location corresponds to a
16 / 50
After the execution of instruction “RET”
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An offset alone is not complete without
18 / 50
The instruction ADC has________ Operand(s)
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Assembly language is:
20 / 50
When a very large number is divided by very small number so that the quotient is larger than the space provided, this is called
21 / 50
While using STOBS, if DF=1 then
22 / 50
physical address of the stack is obtained by
23 / 50
Which mathematical operation is dominant during the execution of SCAS instruction
24 / 50
Only instructions allow moving data from memory to memory.
25 / 50
Which bit of the attributes byte represents the blue component of foreground color
26 / 50
CMPS instruction subtracts the source location to the destination location. Destination location always lies in
27 / 50
In 8088 architecture, whenever an element is pushed on the stack
28 / 50
In string manipulation whenever an instruction needs a memory source, which of the following will hold the pointer to it?
29 / 50
Which is the unidirectional bus ?
Control Bus
(II) Data Bus
(III) Address Bus
30 / 50
Code Segment is associated to _______ register by default.
31 / 50
After the execution of REP instruction CX will be decremented then which of the following flags will be affected?
32 / 50
The basic function of SCAS instruction is to
33 / 50
The iAPX88 processor supports ___________ modes of memory access.
34 / 50
The routine that executes in response to an INT instruction is called
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“Far” jump is not position relative but is _______________
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8088 is a 16bit processor with its accumulator and all registers of __________.
37 / 50
one DIV instruction has
38 / 50
Which bit of the attributes byte represents the blue component of background color ?
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40 / 50
In STOSB instruction, when DF is Set, SI is
41 / 50
Which bit of the attributes byte represents the red component of background color ?
42 / 50
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
43 / 50
In assembly the CX register is used normally as a ______________register.
44 / 50
In STOS instruction, the implied source will always be in
45 / 50
Which of the following options contain the set of instructions to open a window to the video memory?
46 / 50
MOV instruction transfers a byte or word from which of the following source location.
47 / 50
After the execution of “PUSH AX” statement
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When a 32 bit number is divided by a 16 bit number, the quotient is of
49 / 50
When a 16 bit number is divided by an 8 bit number, the dividend will be in
50 / 50
The iAPX888 architecture consists of _______ register.
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