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
RETF will pop the offset in the
3 / 50
Which bit of the attributes byte represents the red component of background color ?
4 / 50
The physical address of the stack is obtained by
5 / 50
one DIV instruction has
6 / 50
Which of the following options contain the set of instructions to open a window to the video memory?
7 / 50
mov ax,5 has
8 / 50
_______ register holds the address of next instruction is to be executed
9 / 50
When the operand of DIV instruction is of 16 bits then implied dividend will be of
10 / 50
In a video memory, each screen location corresponds to
11 / 50
The routine that executes in response to an INT instruction is called
12 / 50
which bit sets the character "blinking" on the screen?
13 / 50
When a 16 bit number is divided by an 8 bit number, the quotient will be in
14 / 50
All the addressing mechanisms in iAPX88 return a number called _____________ address.
15 / 50
When a 32 bit number is divided by a 16 bit number, the quotient is of
16 / 50
The second byte in the word designated for screen location holds
17 / 50
In STOS instruction, the implied source will always be in
18 / 50
Regarding assembler, which statement is true:
19 / 50
When an item is pushed on the decrementing stack, the top of the stack is
20 / 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:
21 / 50
Which mathematical operation is dominant during the execution of SCAS instruction
22 / 50
When a 32 bit number is divided by a 16 bit number, the quotient will be stored in
23 / 50
The iAPX888 architecture consists of _______ register.
24 / 50
To transfer control back the RET instruction take
25 / 50
26 / 50
Which is the unidirectional bus ?
Control Bus
(II) Data Bus
(III) Address Bus
27 / 50
decrements SP (the stack pointer) by two and then transfers a word from the source operand to the top of stack
28 / 50
In assembly the CX register is used normally as a ______________register.
29 / 50
The maximum parameters a subroutine can receive (with the help of registers) are
30 / 50
After the execution of STOSW the CX will be
31 / 50
Code Segment is associated to _______ register by default.
32 / 50
The basic function of SCAS instruction is to
33 / 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
34 / 50
After execution of JCXZ instruction CX will changed with flag affect.
35 / 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
36 / 50
Stack is a ______ that behaves in a first in last out manner.
37 / 50
After the execution of instruction “RET 2”
38 / 50
To convert any digit to its ASCII representation
39 / 50
REP will always
40 / 50
Left-Shift-Operation the left most bit _______
41 / 50
The first instruction of “COM” file must be at offset:
42 / 50
After the execution of instruction “RET”
43 / 50
The extended ASCII has
44 / 50
_________ is one of the reasons due to which string instructions are used in 8088
45 / 50
46 / 50
After the execution of “PUSH AX” statement
47 / 50
In the instruction MOV AX, 5 the number of operands are
48 / 50
49 / 50
The execution of the instruction “mov word [ES : 0], 0x0741” will print character “A” on screen , background color of the screen will be
50 / 50
The clear screen operation initialize whole block of memory
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