CS401 Midterm Online Quiz

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CS401-Midterm

1 / 50

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

2 / 50

To transfer control back the RET instruction take

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

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“Far” jump is not position relative but is _______________

5 / 50

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

6 / 50

The basic function of SCAS instruction is to

7 / 50

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

8 / 50

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

9 / 50

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

10 / 50

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

11 / 50

The physical address of the stack is obtained by

12 / 50

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

13 / 50

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

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

15 / 50

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

16 / 50

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

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Regarding assembler, which statement is true:

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

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After the execution of “PUSH AX” statement

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

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

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When a 32 bit number is divided by a 16 bit number, the quotient will be stored in

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Only instructions allow moving data from memory to memory.

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While using STOBS, if DF=1 then

25 / 50

mov ax,5 has

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The iAPX88 processor supports ___________ modes of memory access.

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

28 / 50

If the address of memory location Num1 is 0117 and its content is 0005 then after execution of the instruction “ mov bx, Num1” bx will contain

29 / 50

The instruction ADC has________ Operand(s)

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To convert any digit to its ASCII representation

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After the execution of “PUSH AX” statement

32 / 50

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

33 / 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:

34 / 50

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

35 / 50

In STOSB instruction, when DF is Set, SI is

36 / 50

After the execution of STOSW, the CX will be

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8088 is a 16bit processor with its accumulator and all registers of __________.

38 / 50

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

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The physical address of the stack is obtained by

40 / 50

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

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In STOS instruction, the implied source will always be in

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one DIV instruction has

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Which is the unidirectional bus ?

Control Bus

(II) Data Bus

(III) Address Bus

44 / 50

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

45 / 50

One screen location corresponds to a

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

47 / 50

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

48 / 50

RETF will pop the offset in the

49 / 50

After the execution of SAR instruction:

50 / 50

In string manipulation whenever an instruction needs a memory source, which of the following will hold the pointer to it?

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