CS401-Midterm
1 / 50
After the execution of REP instruction CX will be decremented then which of the following flags will be affected?
2 / 50
The first instruction of “COM” file must be at offset:
3 / 50
When an item is pushed on the decrementing stack, the top of the stack is
4 / 50
“Far” jump is not position relative but is _______________
5 / 50
CMPS instruction subtracts the source location to the destination location. Destination location always lies in
6 / 50
Which is the unidirectional bus ?
Control Bus
(II) Data Bus
(III) Address Bus
7 / 50
In STOSB instruction, when DF is Set, SI is
8 / 50
which bit sets the character "blinking" on the screen?
9 / 50
When a 16 bit number is divided by an 8 bit number, the quotient will be in
10 / 50
| 0 |--›| 1 | 1 | 0 | 1 | 0 | 0 | 0 | --›| C | is a example of ______
11 / 50
While using STOBS, if DF=1 then
12 / 50
Which mathematical operation is dominant during the execution of SCAS instruction
13 / 50
When a 32 bit number is divided by a 16 bit number, the quotient is of
14 / 50
All the addressing mechanisms in iAPX88 return a number called _____________ address.
15 / 50
After the execution of MOVS instruction which of the following registers are updated
16 / 50
_______ register holds the address of next instruction is to be executed
17 / 50
The physical address of the stack is obtained by
18 / 50
The second byte in the word designated for one screen location holds
19 / 50
In assembly the CX register is used normally as a ______________register.
20 / 50
The clear screen operation initialize whole block of memory
21 / 50
In string manipulation whenever an instruction needs a memory source, which of the following will hold the pointer to it?
22 / 50
The iAPX88 processor supports ___________ modes of memory access.
23 / 50
8088 is a 16bit processor with its accumulator and all registers of __________.
24 / 50
if ax contains decimal -2 and BX contains decimal 2 then after the execution of instructions: CMP AX, BX ,JA label
25 / 50
Which bit of the attributes byte represents the blue component of background color ?
26 / 50
JC and JNC test the ____________ flag.
27 / 50
To transfer control back the RET instruction take
28 / 50
Which bit of the attributes byte represents the blue component of foreground color
29 / 50
Left-Shift-Operation the left most bit _______
30 / 50
The execution of the instruction “mov word [ES: DI], 0x0720”
31 / 50
The execution of the instruction “mov word [ES: 0], 0x0741” will print “A” on the screen, color of the character will be
32 / 50
RETF will pop the offset in the
33 / 50
In the instruction “CMP AX,BX” the contents of
34 / 50
If the direction of the processing of a string is from higher addresses towards lower addresses then
35 / 50
The instruction ADC has________ Operand(s)
36 / 50
Which of the following options contain the set of instructions to open a window to the video memory?
37 / 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:
38 / 50
The second byte in the word designated for screen location holds
39 / 50
After the execution of instruction “RET 2”
40 / 50
_________ is one of the reasons due to which string instructions are used in 8088
41 / 50
When a 16 bit number is divided by an 8 bit number, the dividend will be in
42 / 50
One screen location corresponds to a
43 / 50
44 / 50
REP will always
45 / 50
The extended ASCII has
46 / 50
Execution of the instruction “mov word [ES : 0], 0x0741” will print
47 / 50
one Only ___________ instructions allow moving data from memory to memory.
48 / 50
Which bit of the attributes byte represents the red component of background color ?
49 / 50
The basic function of SCAS instruction is to
50 / 50
“mov byte [num1],5” is _______ instruction.
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