CS 609 Quiz All Online MCQS

(1)_________ is used to identify the cause of interrupt.

Interrupt ID Register (Page 116)

PC Register

Register

None of All These

 

(2)Int ________ is used to control the printer via the BIOS.

17H (Page 84)

18H

20H

21H

 

(3)Only ________ ports are important from a programming point of
view.

70 and 71H (Page 141)

71 and 72H

70 and 72H

72 and 73H

 

(4)In case of synchronous communication a timing signal is
required to identify the start and end of a bit.

True ( 105)

False

(5)

 

In order to produce the sound from PC internal Speaker we have
to load the___bit divisor value at the ___port.

8, 0x21

16, 0x42

32, 0x22

64, 0x32

 

(6)The ____________ function simply enables the self test
facility within the modem control register STOn()

SelfTest()

SelfTestOn() (Page 127)

Non of these

 

(7)BIOS support _____________UARTS as COM ports.

6

4 (Page 113)

3

2

 

(8)The BIOS interrupt 0x1AH can be used to configure real-time
clock

True (Page 136)

False

 

(9)The baud rate is set in accordance with the divisor value
loaded within the UART internal registers base +0 and base +1.

TRUE (Page 114)

FALSE

 

(10) The ————-function uses the COM port number to
receive a byte from the COM port using BIOS services.

Receive( )

Recievebyte()

recievechar() (125)

None of All These

1_Blocks can be termed as______________.

Cylinder per sector
(not sure)

 

2_ _______ are the circular division of the disk.

Tracks

 

3_ We can access Blocks for FAT using _________.

FCB

 

4_ ________ is an internal data structure of DOS and resides in the main memory.

None of the given.

(Ans is SFT, however
its not in options.)

 

5_ To access the drive parameter block we use undocumented service
______.

21H/32H

 

6_ _______ is an absolute address relative to the start of the physical drive.

LBA 240pg

 

7_There is/are ____ DMA controller’s masking register(s).

1 not sure

 

8_ Highest physical capacity of the disk according to the IDE
interface is approximately _________.

127GB

 

9_ To access the block within-cluster using BIOS services the
cluster number should be converted into _____.

LSN pg258

10_ What will be the value of the DL register when we are accessing the C drive using undocumented service 21H/32H?

3 pg249

 

There is/are ____ DMA
controller’s masking register(s). CS609

Not confirmed

CS609 Quiz

Extended BIOS services require that the address of the block is
specified as _______. CS609

LBA address (Page 210)

Extended services require that the address of the block is
specified as an LBA address.

CS609 Quiz Midterm

A DMA cannot work in ___________ mode.

CS609 Quiz

 

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