Chapter 15 (Disk Fundamentals) – Assessment True-False Please indicate whether e

Question

Chapter 15 (Disk Fundamentals) – Assessment

True-False

Please indicate whether each statement is True (T) or False (F).

1. Each read-write head in a disk drive moves independently of the other read/write heads.

2. A track contains multiple sectors.

3. A sector contains multiple cylinders.

4. Two important measurements of hard disk efficiency are the average seek time and the disk rotation speed.

5. Translation of disk geometry to logical sector numbers is always performed by the operating system.

6. A hard disk partition can be divided into multiple volumes.

7. An extended partition can be divided into any number of logical partitions.

8. Clusters are the basic unit of storage for directories and files in a FAT-type file system.

9. If each disk cluster contains two logical sectors, the cluster size must be 4,096.

10. The cluster allocation table (CAT) keeps track of all clusters used by a file.

11. A disk containing primarily small files should use a small cluster size to make the most efficient use of space.

12. The FAT32 file system allows the setting of permissions on individual files and folders.

13. The NTFS file system supports Unicode filenames, but FAT32 does not.

14. The MS-DOS file attribute byte does not include a hidden attribute.

15. The extended directory format in MS-Windows (for long filenames) contains separate entries for the date when a file was created, and when the file was last modified.

Explanation / Answer

Answers to multiple questions
1.
A disk consists of sectors, tracks and cylinders. Hard disk consists of several platters.
One platter have two read/write heads on each side.
All read/write heads are attached one single arm.
So that read/write head in a disk canot move independtly.

Hence, the statement is False.
--------------------------------------------------------------------------------------------------------
2.
A disk divided into cylinders,tracks and sectors.
Each track contains several sectors.
A sector is a area on a track.

Hence , the statement is True.
--------------------------------------------------------------------------------------------------------
3.
A track contains multiple sectors.
Cylinders contains tracks.
Hence , the statement is False.

--------------------------------------------------------------------------------------------------------
4.
Average Seek Time:
The number of milliseconds to take to reach the read/write head of the disk

Rotation Speed: The number of rotations of a hard disk spindle.
Rotation speed is measured in RPM(rotations per minute)
The typical rotational speeds are 7200 RPM, 10000 RPM and 15000 RPM

These two are important features of the hard disk

Hence , the statement is True.
--------------------------------------------------------------------------------------------------------
5.
Hard drive controllers are used to convert the physical disk geometry to logical
structure is done by the operating system.
Hence , the statement is True.
--------------------------------------------------------------------------------------------------------
6.
The hard disk may contain large space for memory.
As per user requirements, user can partition the volume (size in GB) into required size.
Volume is divided into partitions.
For example, an 120 GB hard disk volume can divided into either 2 partitions (60+60)
or 4 partitions(30+30+30+30)

Hence , the statement is True.
--------------------------------------------------------------------------------------------------------
7.
Extended partition other than OS parition can be divided into any number
of partitions.

Hence , the statement is True.
--------------------------------------------------------------------------------------------------------
8.
A cluster is group of consecutive sectors.
A cluster is 1,2,4,8,32 or 64 sectors.
A sector can be range from 512Bytes to 32 Bytes.
Therefore, clusters are basic units of the Files and directories
Hence , the statement is True.
--------------------------------------------------------------------------------------------------------
9. If each disk cluster contains two logical sectors, no need to have cluster
size of 4096.
if cluster size is more than more space is wasted.
If cluster is divided into two or more than cluster size is should be small.

Hence , the statement is False.
--------------------------------------------------------------------------------------------------------
10.
The File Allocatio Table that stores the all numbers of clusters the file occupied.
There is no Cluster Allocation table.
Hence , the statement is False.
--------------------------------------------------------------------------------------------------------
11.
If disk contains files of small sizes which are multiples of 512, 1024 etc
then it better to choose small cluster size .Wastage of space will be minimized.
If the cluster is set to 4096 or more then the files size is 512, 1024 then
the remaining memory space is unused and wastage.

Hence , the statement is True.
--------------------------------------------------------------------------------------------------------
12.
FAT32 file system allows permissions on files
using chmod command DOS-Operating system.

Hence , the statement is True.
--------------------------------------------------------------------------------------------------------
13.
FAT32 doesnot support unique (ASCII) files names.
NTFS file system supports unique names for files.
Hence , the statement is True.

--------------------------------------------------------------------------------------------------------
14.
The MS-Dos file attribte byte contains hidden attribute
along with normal, read only ,hidden, system ,volume lebel and directory and archive.
Hence , the statement is False.
--------------------------------------------------------------------------------------------------------
15.
Extended windows operating systems like xp, vista or windows 7
maintains separate attributes for file created, modified and accessed.

Hence , the statement is True.

Related Questions

Navigate

• Browse (All)
• Browse C
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.