Question 1

What is hexadecimal text representation?

Accepted Answer

Hex uses 0-9 and A-F to show bytes compactly. Each byte = 2 hex digits. A=41, hello=68656C6C6F. Common in programming, color codes (#FF0000), memory addresses, and debugging.

Question 2

When would I use hex encoding for text?

Accepted Answer

Debugging binary data. Viewing file contents (hex editor). Color codes in CSS/HTML. MAC addresses. Hash digests (MD5, SHA). Representing non-printable characters.

Question 3

What character encoding should I use?

Accepted Answer

UTF-8 is the modern standard - it handles all characters and is backward-compatible with ASCII. Use it unless you have specific legacy requirements.

Question 4

Will encoding/decoding change my data?

Accepted Answer

Proper encoding is reversible. However, using wrong encoding can corrupt special characters. Always use the same encoding for encode and decode.

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