DSA · Theory

Implementation of Queue using Linked List

Theory

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Implementation of Queue using Linked List

Implementation of Queue using Linked List 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 Implementation of Queue using Linked List.

From the example next to this theory — Implementation of Queue using Linked List — queue is FIFO.

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

Viva — what is Implementation of Queue using Linked List? Then show head → next → …. Then name the trap.

Diagram

  front → [A][B][C] ← rear
  out ↑         ↑ in
       FIFO

Exam tip

What is Implementation of Queue using Linked List? Show this: head → next → …. Trap: losing the next pointer on delete.

Example

from collections import deque

q = deque()
q.append(10)      # enqueue
q.append(20)
print(q.popleft())  # 10
print(list(q))

Implementation of Queue using Linked List — queue is FIFO. deque.popleft() is O(1).

Short notes

DefImplementation of Queue using Linked List — a ticket queue node in a counter.
Rulehead → next → …
Traplosing the next pointer on delete
Usea counter

DSA · Theory

Implementation of Queue using Linked List

← All stacks

Theory

23/810

Implementation of Queue using Linked List

Implementation of Queue using Linked List 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 Implementation of Queue using Linked List.

From the example next to this theory — Implementation of Queue using Linked List — queue is FIFO.

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

Viva — what is Implementation of Queue using Linked List? Then show head → next → …. Then name the trap.

Diagram

  front → [A][B][C] ← rear
  out ↑         ↑ in
       FIFO

Exam tip

What is Implementation of Queue using Linked List? Show this: head → next → …. Trap: losing the next pointer on delete.

Example

from collections import deque

q = deque()
q.append(10)      # enqueue
q.append(20)
print(q.popleft())  # 10
print(list(q))

Implementation of Queue using Linked List — queue is FIFO. deque.popleft() is O(1).

Short notes

DefImplementation of Queue using Linked List — a ticket queue node in a counter.
Rulehead → next → …
Traplosing the next pointer on delete
Usea counter

Implementation of Queue using Linked List

Example

Short notes

Questions

Implementation of Queue using Linked List

Example

Short notes

Questions