You are here »Home / Resources / Guess Papers / Guess Papers ( Computer Science, 9th Class )
Please login to rate this resource.
A floppy disk, also called simply a diskette or disk, is a small flexible Mylar disk coated with iron oxide on which data are stored. The floppy disk has been around since early 1970s, today it is available in three 3½ inch, 5¼ inch and 8 inch sizes. The 5¼ and 8 inch diskettes are covered by stiff protective jacket with different holes. The central big hole called hub ring which is used to hold by disk drive during rotation. The elongated read write window is used to read and write data through read/write head. The small hole next to the hub ring is called index hole which is used to locating data through computer. The cut out on the side of the floppy disk is called write protect notch. If we cover this opening with a piece of paper then we can’t write data on to disk.
In small diskette a hard plastic cover and protective metal is used to protect disk. Before using a disk we have to format a disk in which disk is divided into tracks and sectors for storing the data. Diskettes may be double sided and single sided while the storage capacity become less or more.
Floppy diskettes are more convenient to use with microcomputers. A floppy disk which is a random access device can access data fast than magnetic tape
Moalims are a private institutional information system with over 2,500 institutes registered from all over Pakistan and growing day by day, by the grace of Allah. It is established in 2009. It will be the largest education information system of its kind in the Pakistan Inshallah. As a global network, Moalims aims to give Parents, Teachers, students and Professionals a quality information and to prepare engaged People/citizens who shape not only the communities they live in, but also the wider world.
A project of Web & Network Solutions Limited