SOLVED CS609 Quiz No.2 Solution and Discussion
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Quiz No.2 Total Questions : 10
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@zareen said in CS609 Quiz No.2 Solution and Discussion:
What are the 3 types of viruses?
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Resident Virus. Resident viruses live in your RAM memory. …
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Multipartite Virus. …
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Direct Action Virus. …
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Browser Hijacker. …
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Overwrite Virus. …
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Web Scripting Virus. …
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Boot Sector Virus. …
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Macro Virus.
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What are the 3 types of viruses?
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@zaasmi
(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 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
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1_Blocks can be termed as______________.
Cylinder per sector (not sure)2_ _______ are the circular division of the disk.
Tracks3_ We can access Blocks for FAT using _________.
FCB4_ ________ 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/32H6_ _______ is an absolute address relative to the start of physical drive.
LBA 240pg7_There is/are ____ DMA controller’s masking register(s).
1 not sure8_ Highest physical capacity of the disk according to the IDE interface is approximately _________.
127GB9_ To access the block within cluster using BIOS services the cluster number should be converted into _____.
LSN pg25810_ What will be the value of DL register when we are accessing C drive using undocumented service 21H/32H?
3 pg249 -
@zaasmi
There is/are ____ DMA controller’s masking register(s). CS609 -
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Extended BIOS services require that the address of the block is specified as _______. CS609
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Highest capacity of disk can be accessed using BIOS functions is _______.
• Hence the highest capacity of disk can be
accessed using bios functions is
•63x16x1024x512= 504 MB approx -
_______ are the circular division of the disk. (Track)
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_________ can be used to simulate a DMA request through software (Choose best option).
All quiz are repeating as per previous post.
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There is/are ____ DMA controller’s masking register(s). CS609
Not confirmed
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______________ used to program various common parameters of transfer for all the channels. CS609
(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 can be termed as______________. CS609
sectors per track (Page 202)
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 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 a LBA address.
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Highest physical capacity of the disk according to the IDE interface is approximately _________. CS609
(127GB) Page 212Highest 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. -
________ are the longitudinal division of the disk. CS609
(Sector) Page 201
Tracks are the circular division of the disk and the sectors are the longitudinal division of
the disk as shown in the diagram above. -
_________ can be used to simulate a DMA request through software (Choose best option). CS609
(DMA request register) Page 192
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A DMA cannot work in ___________ mode.
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__________ will specify if the DMA transfer will happen as a single transfer, block transfer or demand transfer. ( command register Page 73)



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