CS609 Final Term Solved MCQs by Junaid

1. The signals are used by various devices to request a DMA operation.

•  DREQ

PG #186

•  REQ
•  DRE

2. DMA works in modes.

•  2
•  3

PG #188

•  5
•  7

3. DMA Request register can be used to simulate a DMA request through software in case of___.

•  I/O to memory transfer

 Memory to memory transfer

PG #192

•  Memory to I/O transfer

4. are the circular division of the disk.

 Tracks

PG #201

•  Sectors
•  Blocks

5. Blocks are

 Sectors per track

PG #202

•  Track per sector
•  Cylinder per track

6. Last bytes of data part in partitioning table are the partition table signature.

•  2

PG #218

•  4
•  6
•  8

7. Information about further partitioned drives is available at physical block of extended partition.

 First

PG #222

•  Second
•  Third
•  Fourth

8. will be used to get drive parameters.

•  Int 13H/42H

 Int 13H/48H

PG #238

•  Int 13H/66H
•  Int 13H/66H

9. Inside a boot block operating system name occupies bytes.

•  3
•  5
•  8

Not sure

•  11

10. A programmer wants to access the DPB(Drive Parameter Block) for C drive using undocumented service 21H/32H, what he should place in DL register

•  0

PG #249

•  1
•  2
•  3

20. Blocks for FAT can be accessed using .

•  BPB
•  DPB
•  FCB
•  Both BPB and DPB.

21. In main memory smallest addressable unit is .

•  Byte
•  Nibble
•  Word

22. Using the root directory entry and the , we can access the contents of File.

•  Reserved Blocks
•  Number of FAT copies

 File Allocation Table(FAT)

PG # 241

23. If a file is having more than one cluster then it will be managed by

•  FAT
•  BPB
•  DPB

24. Practically in FAT 32, total number of entries are

•  226
•  228
•  230
•  232

25. keeps the back up of its boot block.

•  FAT 12
•  FAT 16

 FAT 32

26. NTFS can store file name in form.

 UNICODE

•  ASCII