Code review checklist for LLD - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the primary goal of a Low-Level Design (LLD) code review?

To ensure the detailed design and implementation meet the requirements, are clear, maintainable, and follow best practices.

beginner

Name two key aspects to check in class and method design during an LLD code review.

Check for single responsibility principle and proper method naming that clearly describes functionality.

intermediate

Why is it important to review error handling and logging in LLD code reviews?

Because proper error handling ensures system stability and logging helps in debugging and monitoring.

intermediate

What should you verify about data structures and algorithms in an LLD code review?

Verify that chosen data structures and algorithms are efficient and appropriate for the problem.

beginner

How does adherence to coding standards impact the LLD code review?

It improves code readability, consistency, and maintainability across the project.

Which principle should be checked to ensure a class has one clear responsibility?

A Open/Closed Principle

B Liskov Substitution Principle

C Single Responsibility Principle

D Dependency Inversion Principle

The Single Responsibility Principle states that a class should have only one reason to change.

What is a key reason to review method names in LLD?

A To ensure they are short and cryptic

B To ensure they are all uppercase

C To ensure they use numbers for uniqueness

D To ensure they clearly describe the method's functionality

Clear method names improve code readability and understanding.

Why should error handling be reviewed in LLD?

A To ignore exceptions

B To ensure graceful handling and recovery from errors

C To ensure the system crashes on errors

D To remove all try-catch blocks

Proper error handling helps maintain system stability and user experience.

Which of the following is NOT a focus during LLD code review?

A UI design

B Algorithm efficiency

C Data structure appropriateness

D Code readability

UI design is typically reviewed in higher-level design or frontend reviews, not LLD.

Adhering to coding standards helps with:

A Improving code consistency and maintainability

B Increasing bugs

C Making code harder to read

D Slowing down development

Coding standards promote uniformity and easier maintenance.

List the main areas to focus on during a Low-Level Design code review.

Think about what makes code clear, efficient, and reliable.

Explain why reviewing error handling and logging is critical in LLD.

Consider what happens when things go wrong in the system.