CS401- Computer Architecture and Assembly Language Programming McQs collection Part4

CS401- Computer Architecture and Assembly Language Programming  McQs collection Part3

Question No: 1    ( M a r k s: 1 )    

 After the execution of SAR instruction

       ► The msb is replaced by a 0

► The msb is replaced by 1

► The msb retains its original value

► The msb is replaced by the value of CF

Question No: 2    ( M a r k s: 1 )    

 RETF will pop the offset in the

► BP

► IP

► SP

► SI

Question No: 3    ( M a r k s: 1 )  \ The routine that executes in response to an INT instruction  is called

► ISR

► IRS

► ISP

► IRT

Question No: 4    ( M a r k s: 1 )    

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

► 0x0010

► 0x0100

► 0x1000

► 0x0000

Question No: 5    ( M a r k s: 1 )    

 “Far” jump is not position relative but is _______________

► memory   dependent

► Absolute

► temporary

► indirect

Question No: 6    ( M a r k s: 1 )   

 Only ___________ instructions allow moving data from memory to memory.

       ► string

► word

► indirect

► stack

Question No: 7    ( M a r k s: 1 )    

 After the execution of instruction “RET 2”

       ► SP is incremented by 2

► SP is decremented by 2

► SP is incremented by 4

► SP is decremented by 4

Question No: 8    ( M a r k s: 1 )   

 DIV instruction has

       ► Two forms

► Three forms

► Four forms

► Five forms

Question No: 9    ( M a r k s: 1 )    

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

► 8 bits

► 16 bits

       ► 32 bits                  

► 64 bits

Question No: 10    ( M a r k s: 1 )   

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

► SI only

► DI only

       ► SI and DI only

► SI, DI and BP only

Question No: 11    ( M a r k s: 1 )    

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

► SP is decremented by 1

       ► SP is decremented by 2

► SP is decremented by 3

► SP is decremented by 4

Question No: 12    ( M a r k s: 1 )   

 When a very large number is divided by very small number so that the quotient is larger than the space provided, this is called

► Divide logical error

       ► Divide overflow error

► Divide syntax error

► An illegal instruction

Question No: 13    ( M a r k s: 1 )    ]

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

       ► The character code

► The attribute byte

► The parameters

► The dimensions

Question No: 14    ( M a r k s: 1 )  

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

► mov AX, 0xb008

mov ES, AX

       ► mov AX, 0xb800

mov ES, AX

► mov AX, 0x8b00

mov ES, AX

► mov AX, 0x800b

mov ES, AX

Question No: 15    ( M a r k s: 1 )    

 In a video memory, each screen location corresponds to

► One byte

       ► Two bytes

► Four bytes

► Eight bytes

Question No: 16    ( M a r k s: 1 )    

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

       ► Black

► White

► Red

► Blue