CS401 Midterm Online Quiz

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CS401-Midterm

1 / 50

After the execution of instruction “RET”

2 / 50

which bit sets the character "blinking" on the screen?

3 / 50

When a 16 bit number is divided by an 8 bit number, the quotient will be in

4 / 50

Which bit of the attributes byte represents the red component of background color ?

5 / 50

The second byte in the word designated for one screen location holds

6 / 50

Which mathematical operation is dominant during the execution of SCAS instruction

7 / 50

The iAPX88 processor supports ___________ modes of memory access.

8 / 50

_______ register holds the address of next instruction is to be executed

9 / 50

Execution of the instruction “mov word [ES : 0], 0x0741” will print

10 / 50

In the instruction “CMP AX,BX” the contents of

11 / 50

To convert any digit to its ASCII representation

12 / 50

When an item is pushed on the decrementing stack, the top of the stack is

13 / 50

All the addressing mechanisms iniAPX88 return a number called ______ address.

14 / 50

When the operand of DIV instruction is of 16 bits then implied dividend will be of

15 / 50

After execution of JCXZ instruction CX will changed with flag affect.

16 / 50

The extended ASCII has

17 / 50

After the execution of instruction “RET ”

18 / 50

Each screen location corresponds to a word, the lower byte of this word contains ____

19 / 50

After the execution of REP instruction CX will be decremented then which of the following flags will be affected?

20 / 50

one Only ___________ instructions allow moving data from memory to memory.

21 / 50

Which of the following options contain the set of instructions to open a window to the video memory?

22 / 50

ASCII stands for ____________. The screen is two dimensional space having:

23 / 50

Regarding assembler, which statement is true:

24 / 50

Stack is a ______ that behaves in a first in last out manner.

25 / 50

After the execution of MOVS instruction which of the following registers are updated

26 / 50

Which bit of the attributes byte represents the blue component of foreground color

27 / 50

The second byte in the word designated for screen location holds

28 / 50

The execution of the instruction “mov word [ES: DI], 0x0720”

29 / 50

If we want to divide a signed number by 2, this operation can better be accomplished by

30 / 50

The first instruction of “COM” file must be at offset:

31 / 50

In STOS instruction, the implied source will always be in

32 / 50

The maximum parameters a subroutine can receive (with the help of registers) are

33 / 50

RETF will pop the offset in the

34 / 50

Which bit of the attributes byte represents the blue component of background color ?

35 / 50

one DIV instruction has

36 / 50

After the execution of STOSW the CX will be

37 / 50

REP will always

38 / 50

In a video memory, each screen location corresponds to

39 / 50

After the execution of “PUSH AX” statement

40 / 50

One screen location corresponds to a

41 / 50

In assembly the CX register is used normally as a ______________register.

42 / 50

After the execution of SAR instruction:

43 / 50

Which is the unidirectional bus ?

Control Bus

(II) Data Bus

(III) Address Bus

44 / 50

Each screen location corresponds to a word, the lower byte of this word contains ____

45 / 50

All the addressing mechanisms in iAPX88 return a number called _____________ address.

46 / 50

The physical address of the stack is obtained by

47 / 50

After the execution of instruction “RET 2”

48 / 50

An offset alone is not complete without

49 / 50

Assembly language is:

50 / 50

All the addressing mechanisms in iAPX88 return a number called _____________ address.

Your score is

The average score is 64%

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