What is computer key?

What does computer key mean?

A key is a field, or combination of fields, in a database table used to retrieve and sort rows in the table based on certain requirements. Keys are defined to speed up access to data and, in many cases, to create links between different tables.

What are the types of keys in computer?

The keys on your keyboard can be divided into several groups based on function:Typing (alphanumeric) keys. These keys include the same letter, number, punctuation, and symbol keys found on a traditional typewriter.Control keys. ... Function keys. ... Navigation keys. ... Numeric keypad.

How does a computer key work?

When you press a key, it presses a switch, completing the circuit and allowing a tiny amount of current to flow through. The mechanical action of the switch causes some vibration, called bounce, which the processor filters out.

What is the use of a key?

A key is a specially shaped piece of metal that you place in a lock and turn in order to open or lock a door, or to start or stop the engine of a vehicle. She reached for her coat and car keys. The keys on a computer keyboard or typewriter are the buttons that you press in order to operate it.