A virus runs first when a legitimate program is executed. The virus loads itself into memory and looks to see if it can find any other programs on the disk. If it can find one it modifies it to add the virus’s code to the new program. Then the virus launches the real program. Unfortunately, the virus has now reproduced itself so two programs are infected. The next time either of those programs gets executed they infect other program and the cycle continues.
Friends you know a keyboard is the most important part of a computer. It consists of different sets of keys that help us to enter information into the computer. Today we will discuss about keyboard and its keys types and use. A standard keyboard has 104 keys. Types of Keys in a Keyboard: Alphabet Keys Number Keys Special Keys Function Keys Navigation Keys 1. Alphabet Keys: 26 alphabet keys are present on a keyboard from A to Z. these keys are not present in the alphabetical order. These keys are used to type words, sentences or paragraphs. 2. Number Keys: These keys are used for typing numbers. These keys are present above the top row of the alphabet keys and also present on the right side of the keyboard. 3. Special Keys: Keyboard has more special keys such as Space bar Key, caps lock key, backspace key, shift key, enter key, symbol keys and tab key etc. 4. Function Keys: 12 function keys are present on a keyb...
Comments
Post a Comment