Q-How descriptor describes a memory segment and what are the attributes of memory segment?
Ans-A Descriptor describes a Memory Segment by storing attributes related to a Memory
Segment. Significant attributes of a Memory Segment can be its base(starting) address, it length
or limit and its access rights.
Q-Write down the anatomy of NTFS base file system.
Ans- The following slide shows the anatomy of an NTFS based system. The FAT and root
directory has been replaced by the MFT. It will generally have two copies the other copy
will be a mirror image of the original. Rests of the blocks are reserved for user data. In the
middle of the volume is a copy of the first 16 MTF record which are very important to the
system.
Q-Write down the procedure to convert a cluster into sector no?
Ans-No. of System Area Blocks = Reserved Block + Sector per FAT * No. of FAT’s + No. of entries * 32 /
Bytes per Block
First User Block No. = No. of System Area Blocks
Sector No. = (Clust_no – 2)* Blocks per Clust + First User Block #
Q-Write down the structure of data part of partition table.
Ans- Structure of Data Part of P.T.
16 Bytes Partition into of 1st partition
16 Bytes Partition into of 2nd partition.
16 Bytes Partition into of 3rd partition.
16 Bytes Partition into of 4th partition.
02Bytes Signature
Q-In NTFS, where the back up of the boot block are stored and why
Ans The NTFS "Backup Boot Sector" isn't really part of the NTFS Volume; it's actually
stored in a sector immediately following the last sector of the Volume, which makes an
NTFS Volume's partition size 1 sector larger than its Volume size!
Q- Write a Track and sector differnce?
Ans- Tracks are the circular division of the disk and the sectors are the longitudinal division of
the disk.
Q- How many types of viruses?
Ans- Partition Table Virus
Boot Sector Virus
File Viruses
Q- How Scan disk finds bad sectors?
Ans- It attempts to write a block.
After write it reads back the block contents.
Performs the CRC test on data read back.
If there is an error then the data on that block is not stable the cluster of that block
should be marked bad.
