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DSA · Theory

FIFO Approach

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Theory

203/810

FIFO Approach

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

Smallest example: the smallest FIFO Approach example you can type. Type it, run it, and say what you see. If you can do that from memory, you know FIFO Approach.

From the example next to this theory — FIFO Approach: dry-run [4, 1, 3].

Trap — only saying “FIFO Approach” with no example. Fix that before you talk about advanced DSA.

Viva — what is FIFO Approach? Then show the smallest FIFO Approach example you can type. Then name the trap.

Exam tip

What is FIFO Approach? Show this: the smallest FIFO Approach example you can type. Trap: only saying “FIFO Approach” with no example.

Example

# FIFO Approach
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)

FIFO Approach: dry-run [4, 1, 3]. Say the list after one step.

Short notes

  • DefFIFO Approach — a short FIFO Approach example in a short dry-run on paper.
  • Rulethe smallest FIFO Approach example you can type
  • Traponly saying “FIFO Approach” with no example
  • Usea short dry-run on paper

Questions

1

What is FIFO Approach?

2

Give one small example of FIFO Approach.

3

What mistake do beginners make with FIFO Approach?

4

Where do you use FIFO Approach?

203 / 810

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