What is Array

If you can teach Array (what is) using Array what is on Amit's board, you know it. If you only know the heading, you don’t.

Array (what is) on the board: one Array what is step Amit can write from memory. Then say what Array what is on Amit's board looks like after.

Skip Array (what is) and copy-pasting Array what is without a dry-run shows up in a viva board.

Use Array (what is) when Array what is on Amit's board must stay clear. If a simpler DSA step works, use that instead.

Don’t do this with Array (what is) — copy-pasting Array what is without a dry-run. Interviewers spot it in ten seconds.

Array (what is) is not a lonely heading. Amit ties it to Array what is on Amit's board.

Viva for Array (what is): what it is → one Array what is step Amit can write from memory → the mistake (copy-pasting Array what is without a dry-run).

Diagram

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

Exam tip

Say Array (what is) in one breath, then one Array what is step Amit can write from memory, then copy-pasting Array what is without a dry-run.

Example

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

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

Short notes

DefArray (what is) — Amit uses it for Array what is on Amit's board in a viva board.
RuleArray (what is) → one Array what is step Amit can write from memory.
RememberArray (what is) + Big-O (a viva board).
UseArray (what is) in a viva board (Array what is on Amit's board).
TrapArray (what is) — copy-pasting Array what is without a dry-run.
ExArray (what is) → Array what is on Amit's board.

What is Array

If you can teach Array (what is) using Array what is on Amit's board, you know it. If you only know the heading, you don’t.

Array (what is) on the board: one Array what is step Amit can write from memory. Then say what Array what is on Amit's board looks like after.

Skip Array (what is) and copy-pasting Array what is without a dry-run shows up in a viva board.

Use Array (what is) when Array what is on Amit's board must stay clear. If a simpler DSA step works, use that instead.

Don’t do this with Array (what is) — copy-pasting Array what is without a dry-run. Interviewers spot it in ten seconds.

Array (what is) is not a lonely heading. Amit ties it to Array what is on Amit's board.

Viva for Array (what is): what it is → one Array what is step Amit can write from memory → the mistake (copy-pasting Array what is without a dry-run).

Diagram

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

Exam tip

Say Array (what is) in one breath, then one Array what is step Amit can write from memory, then copy-pasting Array what is without a dry-run.

Example

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

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

Short notes

DefArray (what is) — Amit uses it for Array what is on Amit's board in a viva board.
RuleArray (what is) → one Array what is step Amit can write from memory.
RememberArray (what is) + Big-O (a viva board).
UseArray (what is) in a viva board (Array what is on Amit's board).
TrapArray (what is) — copy-pasting Array what is without a dry-run.
ExArray (what is) → Array what is on Amit's board.

What is Array

Example

Short notes

Questions

What is Array

Example

Short notes

Questions