Identify the correct order of the terms (a-e) given below that completes the paragraph describing a method of operation for a keyboard.

A computer keyboard has a key matrix underneath the keys. When a key is pressed, it presses a switch that completes a ____________This allows ___________ to flow. The location of the key pressed is ____________ . The location of the key pressed is compared to a ___________map to find the __________value for the key that has been pressed.
a) Binary
b) Calculated
c) Character
d) Circuit
e) Current

Correct option is B

The paragraph describes how a keyboard works, focusing on the flow of current and the identification of keypresses. Here is the correctly ordered completion of the paragraph:

1. A computer keyboard has a key matrix underneath the keys.
2. When a key is pressed, it presses a switch that completes a circuit (d).
3. This allows current (e) to flow.
4. The location of the key pressed is calculated (b).
5. The location of the key pressed is compared to a character (c) map to find the binary (a) value for the key that has been pressed.

Important Key Points:

1. Key Matrix: A grid of circuits underneath the keys. Each keypress closes a specific circuit.
2. Current Flow: When the circuit is closed, current flows to send the signal to the processor.
3. Character Mapping: The keyboard uses a character map to determine which key corresponds to the signal.
4. Binary Code: Every key corresponds to a unique binary code used by the computer for processing.

Knowledge Booster:

• Keyboards use either membrane switches (cheaper and common) or mechanical switches (durable and preferred by enthusiasts).
• Modern keyboards communicate with the computer using USB or Bluetooth.
• The ASCII (American Standard Code for Information Interchange) table is often used to represent characters in binary form.
• Advanced keyboards may also support features like key rollover and custom key mapping for enhanced functionality.