DSA · Theory

Difference between Linear Queue and Circular Queue

Theory

68/810

Difference between Linear Queue and Circular Queue

Difference between Linear Queue and Circular Queue is a DSA topic. In plain words you use it for print jobs in a lab printer. Don’t start with a slogan — start with that picture.

Smallest example: enqueue / dequeue FIFO. Type it, run it, and say what you see. If you can do that from memory, you know Difference between Linear Queue and Circular Queue.

From the example next to this theory — Difference between Linear Queue and Circular Queue — queue is FIFO.

Trap — confusing front and rear. Fix that before you talk about advanced DSA.

Viva — what is Difference between Linear Queue and Circular Queue? Then show enqueue / dequeue FIFO. Then name the trap.

Diagram

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

Exam tip

What is Difference between Linear Queue and Circular Queue? Show this: enqueue / dequeue FIFO. Trap: confusing front and rear.

Example

from collections import deque

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

Difference between Linear Queue and Circular Queue — queue is FIFO. deque.popleft() is O(1).

Short notes

DefDifference between Linear Queue and Circular Queue — print jobs in a lab printer.
Ruleenqueue / dequeue FIFO
Trapconfusing front and rear
Usea lab printer

DSA · Theory

Difference between Linear Queue and Circular Queue

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Theory

68/810

Difference between Linear Queue and Circular Queue

Difference between Linear Queue and Circular Queue is a DSA topic. In plain words you use it for print jobs in a lab printer. Don’t start with a slogan — start with that picture.

Smallest example: enqueue / dequeue FIFO. Type it, run it, and say what you see. If you can do that from memory, you know Difference between Linear Queue and Circular Queue.

From the example next to this theory — Difference between Linear Queue and Circular Queue — queue is FIFO.

Trap — confusing front and rear. Fix that before you talk about advanced DSA.

Viva — what is Difference between Linear Queue and Circular Queue? Then show enqueue / dequeue FIFO. Then name the trap.

Diagram

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

Exam tip

What is Difference between Linear Queue and Circular Queue? Show this: enqueue / dequeue FIFO. Trap: confusing front and rear.

Example

from collections import deque

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

Difference between Linear Queue and Circular Queue — queue is FIFO. deque.popleft() is O(1).

Short notes

DefDifference between Linear Queue and Circular Queue — print jobs in a lab printer.
Ruleenqueue / dequeue FIFO
Trapconfusing front and rear
Usea lab printer

Difference between Linear Queue and Circular Queue

Example

Short notes

Questions

Difference between Linear Queue and Circular Queue

Example

Short notes

Questions