DSA · Theory

Insertion at beginning

Theory

99/810

Insertion at beginning

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

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

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

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

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

Exam tip

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

Example

# Insertion 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)

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

Short notes

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

DSA · Theory

Insertion at beginning

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Theory

99/810

Insertion at beginning

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

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

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

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

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

Exam tip

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

Example

# Insertion 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)

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

Short notes

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

Insertion at beginning

Example

Short notes

Questions

Insertion at beginning

Example

Short notes

Questions