What are the 3 types of viruses?

• Resident Virus. Resident viruses live in your RAM memory. …

• Multipartite Virus. …

• Direct Action Virus. …

• Browser Hijacker. …

• Overwrite Virus. …

• Web Scripting Virus. …

• Boot Sector Virus. …

• Macro Virus.

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 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

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 main memory.
None of the given.
(Ans is SFT, however its not in options.)

5_ To access drive parameter block we use undocumented service ______.
21H/32H

6_ _______ is an absolute address relative to the start of 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 DL register when we are accessing C drive using undocumented service 21H/32H?
3 pg249

All quiz are repeating as per previous post.

(DMA command register) Page 191

This is the command register. It is used to program various common parameters of
transfer for all the channels.

Blocks
• Blocks are the sectors per track
•Smallest addressable unit in memory
•Address of block is specified as a unique
combination of three parameters (i.e. track, head,
sec)

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

Highest IDE capacity
• Hence highest physical capacity of the disk
according to the IDE interface is
255x16x65536x512 = 127GB
•Extended BIOS functions allow to access disk
with sizes greater than 504 MB through LBA
translation.