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DSA · Theory

Dynamic memory allocation

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Theory

338/810

Dynamic memory allocation

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

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

From the example next to this theory — Dynamic memory allocation: dry-run [4, 1, 3].

Trap — only saying “Dynamic memory allocation” with no example. Fix that before you talk about advanced DSA.

Viva: what is Dynamic memory allocation? Then show the smallest Dynamic memory allocation example you can type. Then name the trap.

Exam tip

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

Example

# Dynamic memory allocation
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)

Dynamic memory allocation: dry-run [4, 1, 3]. Say the list after one step.

Short notes

  • DefDynamic memory allocation — a short Dynamic memory allocation example in a short dry-run on paper.
  • Rulethe smallest Dynamic memory allocation example you can type
  • Traponly saying “Dynamic memory allocation” with no example
  • Usea short dry-run on paper

Questions

1

What is Dynamic memory allocation?

2

Give one small example of Dynamic memory allocation.

3

What mistake do beginners make with Dynamic memory allocation?

4

Where do you use Dynamic memory allocation?

338 / 810

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