Union and Intersection of two Linked Lists
Union and Intersection of two Linked Lists is a DSA topic. In plain words you use it for a ticket queue node in a counter. Don’t start with a slogan — start with that picture.
Smallest example: head → next → …. Type it, run it, and say what you see. If you can do that from memory, you know Union and Intersection of two Linked Lists.
From the example next to this theory — Union and Intersection of two Linked Lists: dry-run [4, 1, 3].
Trap — losing the next pointer on delete. Fix that before you talk about advanced DSA.
Viva — what is Union and Intersection of two Linked Lists? Then show head → next → …. Then name the trap.
[10] → [20] → [30] → / head tail
Exam tip
What is Union and Intersection of two Linked Lists? Show this: head → next → …. Trap: losing the next pointer on delete.