CAD Code Refactoring and Quality 4

Question 1

When should a developer choose 'Inline Class' refactoring?

Accepted Answer

When a class is no longer doing enough to justify its existence

Answer

Inline Class is used when a class has become too small and its responsibilities can be absorbed into another class without losing clarity.

Question 2

In Test-Driven Development, what is the correct order of the TDD cycle?

Accepted Answer

Write test → Write code → Refactor

Answer

TDD follows Red-Green-Refactor: write a failing test, write minimal code to pass it, then refactor for quality.

Question 3

Which refactoring addresses the 'Long Method' code smell by finding a self-contained block of code with a clear purpose?

Accepted Answer

Extract Method

Answer

Extract Method pulls out a cohesive block of code into its own named method, directly addressing the Long Method smell.

Question 4

What does 'cohesion' mean in the context of software quality?

Accepted Answer

The degree to which elements within a module belong together and serve a single purpose

Answer

Cohesion measures how strongly the responsibilities of a class or module are related — high cohesion means the class has a single, focused purpose.

Question 5

A class uses switch statements based on the type of an object in multiple places. Which refactoring pattern resolves this?

Accepted Answer

Replace Conditional with Polymorphism

Answer

Replace Conditional with Polymorphism moves each branch of a type-based switch into an overridden method in a subclass, leveraging OOP dispatch.

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