Context is King: Explain why the code is used in this specific scenario. Always include the impact or consequence of the code.

If you select non-aggregated fields alongside an aggregate function, you MUST include a GROUP BY clause for those fields.

Refer to your actual code. Mention specific data structures (arrays of records), loops, or sub-programs when discussing efficiency.

• Digital Signature: Proves Authenticity & Integrity.
• Digital Certificate: Proves ownership of a Public Key.

"At least £300" means >= 300. Using > is a common error that fails the requirement.

Box Model: Padding/Margin adds to width. Watch for overflow.

Clear: Use clear: both to fix layout breakage after floating elements.

Only pass data strictly required for the sub-program. Unnecessary parameters reduce efficiency.

Use terms like objects, attributes, and mathematical properties. Do not talk about grids of pixels.

Explain how improvements help. e.g., "Larger cache reduces slow fetches from RAM."