Uses of Hexadecimals

Why is hexadecimal used in computing?

It allows representation of 16-bit words as only 4 hexadecimal digits, requiring less display space and enabling faster data entry.

What are two advantages of using hexadecimal over binary?

1) Easy to convert hex digits back to binary if needed
2) Hexadecimal is easier to identify values and spot errors compared to long binary strings.

How are colors represented in hexadecimal for web pages such as HTML or CSS?

Colors are represented using a '#' followed by six hexadecimal digits, with two digits each for red, green, and blue.

What does the hexadecimal color FFFFFF represent?

White

What does the hexadecimal color 000000 represent?

Black

What does the value of a hexadecimal number represent?

A colour's intensity, allowing the full spectrum to be coded. Hex options are often found in graphics packages.

How is hexadecimal used in laser cutting?

Color codes indicate laser strength and depth of cut, e.g. red (#ff0000) for cutting and black (#000000) for engraving.

Why is hexadecimal preferred in low-level programming?

It is quicker, easier, and less error-prone for programmers to use hexadecimal instead of long binary strings. Also more efficient to troubleshoot.

What does the assembly code 'STO FFA4' signify?

It carries out a store operation at the hexadecimal address FFA4.

How is hex used in addressing?

It allows us to know where something is (on a network - IP address), and what the thing is (MAC address)

What is a MAC address?

A Media Access Control address used to uniquely identify devices on a network, consisting of six pairs of hexadecimal digits. They are assigned by the device manufacturer.

What do the first three pairs of a MAC address represent?

The manufacturer ID.

What do the last three pairs of a MAC address represent?

The serial number of the device.

What is the purpose of an IP address?

Internet Protocol addresses identify where a device is located on a network.

What is the difference between IPv4 and IPv6 addresses?

IPv4 uses decimal numbering, while IPv6 uses hexadecimal and provides enough unique addresses for every networked device on the planet.

How is an IPv6 address structured?

It is a 128-bit address organized into eight groups of four hexadecimal digits.

What is one use of hexadecimal in embedded systems?

Hexadecimal is used to display error codes, taking up less screen space than long binary strings (fully displayed on the small screens of an embedded system).

What should you do if your device displays a hexadecimal error code?

Type the error code into the internet to find potential fixes.