DSA · Theory

Persistent Data Structure

Theory

583/810

Persistent Data Structure

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

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

From the example next to this theory — Persistent Data Structure: dry-run [4, 1, 3].

Trap — only saying “Persistent Data Structure” with no example. Fix that before you talk about advanced DSA.

Viva: what is Persistent Data Structure? Then show the smallest Persistent Data Structure example you can type. Then name the trap.

Exam tip

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

Example

# Persistent Data Structure
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)

Persistent Data Structure: dry-run [4, 1, 3]. Say the list after one step.

Short notes

DefPersistent Data Structure — a short Persistent Data Structure example in a short dry-run on paper.
Rulethe smallest Persistent Data Structure example you can type
Traponly saying “Persistent Data Structure” with no example
Usea short dry-run on paper

DSA · Theory

Persistent Data Structure

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Theory

583/810

Persistent Data Structure

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

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

From the example next to this theory — Persistent Data Structure: dry-run [4, 1, 3].

Trap — only saying “Persistent Data Structure” with no example. Fix that before you talk about advanced DSA.

Viva: what is Persistent Data Structure? Then show the smallest Persistent Data Structure example you can type. Then name the trap.

Exam tip

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

Example

# Persistent Data Structure
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)

Persistent Data Structure: dry-run [4, 1, 3]. Say the list after one step.

Short notes

DefPersistent Data Structure — a short Persistent Data Structure example in a short dry-run on paper.
Rulethe smallest Persistent Data Structure example you can type
Traponly saying “Persistent Data Structure” with no example
Usea short dry-run on paper

Persistent Data Structure

Example

Short notes

Questions

Persistent Data Structure

Example

Short notes

Questions