DSA · Theory

Deletion at beginning

Theory

102/810

Deletion at beginning

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

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

From the example next to this theory — Deletion at beginning: dry-run [4, 1, 3].

Trap — only saying “Deletion at beginning” with no example. Fix that before you talk about advanced DSA.

Viva: what is Deletion at beginning? Then show the smallest Deletion at beginning example you can type. Then name the trap.

Exam tip

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

Example

# Deletion at beginning
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)

Deletion at beginning: dry-run [4, 1, 3]. Say the list after one step.

Short notes

DefDeletion at beginning — a short Deletion at beginning example in a short dry-run on paper.
Rulethe smallest Deletion at beginning example you can type
Traponly saying “Deletion at beginning” with no example
Usea short dry-run on paper

DSA · Theory

Deletion at beginning

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Theory

102/810

Deletion at beginning

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

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

From the example next to this theory — Deletion at beginning: dry-run [4, 1, 3].

Trap — only saying “Deletion at beginning” with no example. Fix that before you talk about advanced DSA.

Viva: what is Deletion at beginning? Then show the smallest Deletion at beginning example you can type. Then name the trap.

Exam tip

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

Example

# Deletion at beginning
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)

Deletion at beginning: dry-run [4, 1, 3]. Say the list after one step.

Short notes

DefDeletion at beginning — a short Deletion at beginning example in a short dry-run on paper.
Rulethe smallest Deletion at beginning example you can type
Traponly saying “Deletion at beginning” with no example
Usea short dry-run on paper

Deletion at beginning

Example

Short notes

Questions

Deletion at beginning

Example

Short notes

Questions