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DSA · Theory

Insertion at beginning

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Theory

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Insertion at beginning

Don’t start Insertion at beginning (dll) with jargon. Start with Insertion at beginning dll on Vikram's board. That is the whole point.

Do Insertion at beginning (dll) once by hand. one Insertion at beginning dll step Vikram can write from memory. Change one input. Say the new result out loud.

Without Insertion at beginning (dll), a campus project gets messy and Insertion at beginning dll on Vikram's board is hard to trust.

Use Insertion at beginning (dll) when Insertion at beginning dll on Vikram's board must stay clear. If a simpler DSA step works, use that instead.

Don’t do this with Insertion at beginning (dll): copy-pasting Insertion at beginning dll without a dry-run. Interviewers spot it in ten seconds.

After Insertion at beginning (dll), Vikram should still remember copy-pasting Insertion at beginning dll without a dry-run.

One breath for Insertion at beginning (dll), then Insertion at beginning dll on Vikram's board, then copy-pasting Insertion at beginning dll without a dry-run. Sit down.

Exam tip

For Insertion at beginning (dll): definition + a campus project + one failure.

Example

# Insertion at beginning
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)

Insertion at beginning (dll) — Dry-run [4, 1, 3]. Say the list after one step.

Short notes

  • DefInsertion at beginning (dll) — Vikram uses it for Insertion at beginning dll on Vikram's board in a campus project.
  • RuleInsertion at beginning (dll) → one Insertion at beginning dll step Vikram can write from memory.
  • RememberInsertion at beginning (dll) + Big-O (a campus project).
  • UseInsertion at beginning (dll) in a campus project (Insertion at beginning dll on Vikram's board).
  • TrapInsertion at beginning (dll) — copy-pasting Insertion at beginning dll without a dry-run.
  • ExInsertion at beginning (dll) → Insertion at beginning dll on Vikram's board.

Questions

1

In one breath: what does Insertion at beginning (dll) do for Vikram?

2

Where does Insertion at beginning (dll) show up in a campus project?

3

Viva: one wrong answer people give for Insertion at beginning (dll).

4

Change one input on Insertion at beginning dll on Vikram's board. Predict the new result.

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