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DSA · Theory

Reservoir sampling in C++

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Theory

517/810

Reservoir sampling in C++

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

Smallest example: the smallest Reservoir sampling in C++ example you can type. Type it, run it, and say what you see. If you can do that from memory, you know Reservoir sampling in C++.

From the example next to this theory — Reservoir sampling in C++: dry-run [4, 1, 3].

Trap — only saying “Reservoir sampling in C++” with no example. Fix that before you talk about advanced DSA.

Viva: what is Reservoir sampling in C++? Then show the smallest Reservoir sampling in C++ example you can type. Then name the trap.

Exam tip

What is Reservoir sampling in C++? Show this: the smallest Reservoir sampling in C++ example you can type. Trap: only saying “Reservoir sampling in C++” with no example.

Example

# Reservoir sampling in C++
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)

Reservoir sampling in C++: dry-run [4, 1, 3]. Say the list after one step.

Short notes

  • DefReservoir sampling in C++ — a short Reservoir sampling in C++ example in a short dry-run on paper.
  • Rulethe smallest Reservoir sampling in C++ example you can type
  • Traponly saying “Reservoir sampling in C++” with no example
  • Usea short dry-run on paper

Questions

1

What is Reservoir sampling in C++?

2

Give one small example of Reservoir sampling in C++.

3

What mistake do beginners make with Reservoir sampling in C++?

4

Where do you use Reservoir sampling in C++?

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