Pointer — DSA Technical Interview Questions & Answers

Pointer

Pointer

  • Pointer is a DSA topic. In plain words you use it for a short Pointer example in a short dry-run on paper. Don’t start with a slogan — start with that picture.
  • Smallest example: the smallest Pointer example you can type. Type it, run it, and say what you see. If you can do that from memory, you know Pointer.
  • From the example next to this theory: Pointer: dry-run [4, 1, 3].
  • Trap: only saying “Pointer” with no example. Fix that before you talk about advanced DSA.
  • Viva: what is Pointer? Then show the smallest Pointer example you can type. Then name the trap.

Technical Interview Tip: What is Pointer? Show this: the smallest Pointer example you can type. Trap: only saying “Pointer” with no example.

Code Examples for Pointer

Pointer — working example

# Pointer
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)

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

How to Explain Pointer to an Interviewer

What is Pointer?

Used for a short Pointer example a short dry-run on paper Not just the heading

Give one small example of Pointer.

the smallest Pointer example you can type Pointer: dry-run [4, 1, 3]

What mistake do beginners make with Pointer?

only saying “Pointer” with no example Show the fix

Where do you use Pointer?

a short dry-run on paper a short Pointer example