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DSA · Theory

Which data structure is used by map

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Theory

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Which data structure is used by map

Which data structure is used by map is a DSA idea you prove with name → phone, not with a slogan.

Which data structure is used by map order: meaning → key % size + collision plan → one limit. Dumping ten features helps nobody.

Without Which data structure is used by map, a diary gets messy and name → phone is hard to trust.

Rohit ships Which data structure is used by map in a diary. That is the use case worth saying.

Which data structure is used by map trap: bad hash → pile-up. Rohit loses marks for that every viva.

After Which data structure is used by map, Rohit should still remember bad hash → pile-up.

Viva for Which data structure is used by map: what it is → key % size + collision plan → the mistake (bad hash → pile-up).

Exam tip

For Which data structure is used by map: definition + a diary + one failure.

Example

# Which data structure is used by map
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)

Which data structure is used by map: dry-run [4, 1, 3]. Say the list after one step.

Short notes

  • DefWhich data structure is used by map — Rohit uses it for name → phone in a diary.
  • RuleWhich data structure is used by map → key % size + collision plan.
  • RememberWhich data structure is used by map + Big-O (a diary).
  • UseWhich data structure is used by map in a diary (name → phone).
  • TrapWhich data structure is used by map — bad hash → pile-up.
  • ExWhich data structure is used by map → name → phone.

Questions

1

In one breath: what does Which data structure is used by map do for Rohit?

2

When would Rohit actually reach for Which data structure is used by map?

3

How do you catch bad hash → pile-up?

4

Change one input on name → phone. Predict the new result.

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