Exercise on Secondary Storage

1.  

a)   Rewrite the following items by sorting them in order of capacity by placing the smallest first and the largest last.

1 TB hard disk

CD ROM

DVD

Floppy disk

Zip disk

b)  Sort the following capacities in order of size (in ascending order).

Megabyte

Bit

Gigabyte

Byte

Kilobyte

c)   State two differences between floppy disks and hard disks.

d)  What is the difference between CD-ROM and CD-RW?

e)   State one device suitable for direct-access files and another suitable for serial-access files.

2.  

A 2GB pen drive stores three files of 1.2GB, 250MB and 600KB. How much free space is left in the drive? (In this question you can approximate 210 as 1000).

3.  

Give an example of a storage medium that only supports serial access, and another medium that can also support direct access.

4.  

a)   Which data access method is suitable when searching for the telephone number of a particular client of a company?

b)  Briefly explain your choice to (a)

c)   Which data access method is suitable for issuing a yearly letter to all clients of a company?

d)  Briefly explain your choice in (c).

5.