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DSA · Theory

When should I use a List vs a LinkedList

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Theory

248/810

When should I use a List vs a LinkedList

When should I use a List vs a LinkedList 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 When should I use a List vs a LinkedList.

From the example next to this theory — When should I use a List vs a LinkedList: dry-run [4, 1, 3].

Trap — losing the next pointer on delete. Fix that before you talk about advanced DSA.

Viva — what is When should I use a List vs a LinkedList? Then show head → next → …. Then name the trap.

Exam tip

What is When should I use a List vs a LinkedList? Show this: head → next → …. Trap: losing the next pointer on delete.

Example

# When should I use a List vs a LinkedList
data = [4, 1, 3]
print("start", data)
if data[0] > data[1]:
    data[0], data[1] = data[1], data[0]
print("after one step", data)

When should I use a List vs a LinkedList: dry-run [4, 1, 3]. Say the list after one step.

Short notes

  • DefWhen should I use a List vs a LinkedList — a ticket queue node in a counter.
  • Rulehead → next → …
  • Traplosing the next pointer on delete
  • Usea counter

Questions

1

What is When should I use a List vs a LinkedList?

2

Give one small example of When should I use a List vs a LinkedList.

3

What mistake do beginners make with When should I use a List vs a LinkedList?

4

Where do you use When should I use a List vs a LinkedList?

248 / 810

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