Clarify the three concepts: "Patterns are starter layouts you insert and customise freely. Synced patterns stay linked across the site. Template parts are structural blocks like headers that define the site shell."
Block patterns are predefined arrangements of blocks that users can insert and then modify freely — the inserted blocks are independent copies. Reusable blocks (synced patterns in WordPress 6.3+) stay linked: editing one updates all instances. Template parts are structural pieces (headers, footers) used in block themes via the Site Editor. Register custom patterns with register_block_pattern() or place PHP files in the patterns/ directory of a block theme. Strong candidates discuss: pattern categories for organisation, using theme.json to control which core patterns appear, the difference between synced and unsynced patterns, and how patterns accelerate content creation for editors.
Tests modern WordPress block editor knowledge. Candidates who confuse these three concepts will give incorrect guidance to content editors. Those who can register custom patterns and explain the synced/unsynced distinction demonstrate current block editor expertise.