DSA · Theory

Multidimensional Array

Theory

8/810

Multidimensional Array

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

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

From the example next to this theory: Multidimensional Array — arrays give O(1) index access; matrices are arrays of arrays.

Trap — only saying “Multidimensional Array” with no example. Fix that before you talk about advanced DSA.

Viva: what is Multidimensional Array? Then show the smallest Multidimensional Array example you can type. Then name the trap.

Diagram

  index →  0    1    2
  array → [10,  20,  30]

Exam tip

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

Example

arr = [10, 20, 30, 40]
print(arr[2], arr[-1])
matrix = [[1, 2], [3, 4]]
print(matrix[1][0])  # 3

Multidimensional Array — arrays give O(1) index access; matrices are arrays of arrays.

Short notes

DefMultidimensional Array — a short Multidimensional Array example in a short dry-run on paper.
Rulethe smallest Multidimensional Array example you can type
Traponly saying “Multidimensional Array” with no example
Usea short dry-run on paper

DSA · Theory

Multidimensional Array

← All stacks

Theory

8/810

Multidimensional Array

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

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

From the example next to this theory: Multidimensional Array — arrays give O(1) index access; matrices are arrays of arrays.

Trap — only saying “Multidimensional Array” with no example. Fix that before you talk about advanced DSA.

Viva: what is Multidimensional Array? Then show the smallest Multidimensional Array example you can type. Then name the trap.

Diagram

  index →  0    1    2
  array → [10,  20,  30]

Exam tip

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

Example

arr = [10, 20, 30, 40]
print(arr[2], arr[-1])
matrix = [[1, 2], [3, 4]]
print(matrix[1][0])  # 3

Multidimensional Array — arrays give O(1) index access; matrices are arrays of arrays.

Short notes

DefMultidimensional Array — a short Multidimensional Array example in a short dry-run on paper.
Rulethe smallest Multidimensional Array example you can type
Traponly saying “Multidimensional Array” with no example
Usea short dry-run on paper

Multidimensional Array

Example

Short notes

Questions

Multidimensional Array

Example

Short notes

Questions