CS401 Midterm Online Quiz

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CS401-Midterm

1 / 50

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

2 / 50

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

3 / 50

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

4 / 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:

5 / 50

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

6 / 50

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

7 / 50

The basic function of SCAS instruction is to

8 / 50

While using STOBS, if DF=1 then

9 / 50

If the direction of the processing of a string is from higher addresses towards lower addresses then

10 / 50

The physical address of the stack is obtained by

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

12 / 50

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

13 / 50

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

14 / 50

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

15 / 50

REP will always

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mov ax,5 has

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

18 / 50

physical address of the stack is obtained by

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

20 / 50

The iAPX88 processor supports ___________ modes of memory access.

21 / 50

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

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

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The second byte in the word designated for screen location holds

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

25 / 50

allow changing specific processor behaviors and are used to play with it.

26 / 50

One screen location corresponds to a

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In a video memory, each screen location corresponds to

28 / 50

In STOS instruction, the implied source will always be in

29 / 50

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

30 / 50

Left-Shift-Operation the left most bit _______

31 / 50

After the execution of “PUSH AX” statement

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After the execution of “PUSH AX” statement

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one RET is executed, it recovers the values from

34 / 50

After the execution of STOSW, the CX will be

35 / 50

REP will always

36 / 50

assembly the CX register is used normally as a ______________register.

37 / 50

decrements SP (the stack pointer) by two and then transfers a word from the source operand to the top of stack

38 / 50

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

39 / 50

After the execution of instruction “RET ”

40 / 50

The iAPX888 architecture consists of _______ register.

41 / 50

The execution of the instruction “mov word [ES : 160], 0x1230” will print a character “0” on the screen at

42 / 50

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

43 / 50

In 8088 architecture, whenever an element is pushed on the stack

44 / 50

JC and JNC test the ____________ flag.

45 / 50

RETF will pop the offset in the

46 / 50

Which mathematical operation is dominant during the execution of SCAS instruction

47 / 50

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

48 / 50

The prevalent convention in most high level languages is stack clearing by the

49 / 50

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

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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