CS401- Computer Architecture and Assembly Language Programming McQs collection Part5

CS401- Computer Architecture and Assembly Language Programming  McQs collection Part5

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