Disjoint set data structure

Disjoint set data structure is a DSA topic. In plain words you use it for a short Disjoint set data structure example in a short dry-run on paper. Don’t start with a slogan — start with that picture.

Smallest example: the smallest Disjoint set data structure example you can type. Type it, run it, and say what you see. If you can do that from memory, you know Disjoint set data structure.

From the example next to this theory — Disjoint set data structure: dry-run [4, 1, 3].

Trap — only saying “Disjoint set data structure” with no example. Fix that before you talk about advanced DSA.

Viva: what is Disjoint set data structure? Then show the smallest Disjoint set data structure example you can type. Then name the trap.