CS401 Midterm Online Quiz

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CS401-Midterm

1 / 50

One screen location corresponds to a

2 / 50

Which is the unidirectional bus ?

Control Bus

(II) Data Bus

(III) Address Bus

3 / 50

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

4 / 50

“mov byte [num1],5” is _______ instruction.

5 / 50

MOV instruction transfers a byte or word from which of the following source location.

6 / 50

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

7 / 50

The routine that executes in response to an INT instruction is called

8 / 50

The execution of the instruction “mov word [ES: 0], 0x0741” will print “A” on the screen, color of the character will be

9 / 50

The clear screen operation initialize whole block of memory

10 / 50

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

11 / 50

mov ax,5 has

12 / 50

The second byte in the word designated for screen location holds

13 / 50

In a video memory, each screen location corresponds to

14 / 50

To transfer control back the RET instruction take

15 / 50

JC and JNC test the ____________ flag.

16 / 50

In the instruction MOV AX, 5 the number of operands are

17 / 50

To convert any digit to its ASCII representation

18 / 50

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

19 / 50

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

20 / 50

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

21 / 50

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

22 / 50

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

23 / 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

24 / 50

“Far” jump is not position relative but is _______________

25 / 50

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

26 / 50

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

27 / 50

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

28 / 50

The execution of the instruction “mov word [ES: 0], 0x0741” will print “A” on the screen, color of the character will be

29 / 50

Left-Shift-Operation the left most bit _______

30 / 50

REP will always

31 / 50

if ax contains decimal -2 and BX contains decimal 2 then after the execution of instructions: CMP AX, BX ,JA label

32 / 50

The basic function of SCAS instruction is to

33 / 50

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

34 / 50

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

35 / 50

After the execution of STOSW the CX will be

36 / 50

In the word designated for one screen location, the higher address contains

37 / 50

The instruction ADC has________ Operand(s)

38 / 50

Only instructions allow moving data from memory to memory.

39 / 50

_________ is one of the reasons due to which string instructions are used in 8088

40 / 50

The physical address of the stack is obtained by

41 / 50

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

42 / 50

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

43 / 50

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

44 / 50

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

45 / 50

One screen location corresponds to a

46 / 50

After the execution of “PUSH AX” statement

47 / 50

Regarding assembler, which statement is true:

48 / 50

The physical address of the stack is obtained by

49 / 50

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

50 / 50

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

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