Parking strategy pattern in LLD - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the Parking Strategy Pattern?

It is a design approach that helps decide how to park vehicles in a parking lot using different strategies, like parking nearest to the entrance or in the largest free space.

intermediate

Why use the Strategy Pattern in parking systems?

It allows changing parking rules easily without changing the main system. For example, switching from first-come-first-served to reserved parking without big code changes.

beginner

Name two common parking strategies.

1. Nearest Spot First: Park the vehicle in the closest available spot to the entrance.<br>2. Largest Spot First: Park the vehicle in the largest available spot to fit bigger vehicles.

intermediate

How does the Parking Strategy Pattern improve scalability?

By separating parking logic into strategies, the system can add new parking rules without affecting existing code, making it easier to grow and maintain.

intermediate

What role does the Context play in the Parking Strategy Pattern?

The Context is the parking lot system that uses a chosen strategy to decide where to park vehicles. It delegates the decision to the strategy object.

What does the Parking Strategy Pattern help with?

A Fixing broken cars

B Building physical parking lots

C Choosing different ways to park vehicles

D Calculating parking fees

The pattern focuses on how to decide parking spots using different strategies.

Which of these is NOT a benefit of using the Parking Strategy Pattern?

A Automatically cleans the parking lot

B Easier to add new parking rules

C Improves system flexibility

D Separates parking logic from main system

Cleaning the parking lot is unrelated to the strategy pattern.

In the Parking Strategy Pattern, what is the 'Context'?

A The parking lot entrance

B A vehicle looking for parking

C A parking ticket machine

D The parking lot system using a strategy

The Context is the system that applies the chosen parking strategy.

Which strategy might park a vehicle in the closest spot to the entrance?

A Last Spot First

B Nearest Spot First

C Random Spot

D Largest Spot First

Nearest Spot First chooses the closest available spot.

How does the Parking Strategy Pattern help when parking rules change?

A By changing the strategy without rewriting the whole system

B By rebuilding the parking lot

C By hiring more parking attendants

D By increasing parking fees

The pattern allows swapping strategies easily to adapt to new rules.

Explain the Parking Strategy Pattern and how it helps manage parking decisions.

Think about how different parking rules can be swapped easily.

Describe the roles of Context and Strategy in the Parking Strategy Pattern with an example.

Imagine the system choosing where to park based on a rule.