CAD Code Refactoring and Quality 2

Question 1

Which refactoring technique removes duplication by pulling common behavior into a shared base class?

Accepted Answer

Pull Up Method

Answer

Pull Up Method moves identical or similar methods from subclasses into their parent class to eliminate duplication.

Question 2

What is the primary purpose of the 'Replace Temp with Query' refactoring?

Accepted Answer

Eliminate a temporary variable by replacing it with a method call

Answer

Replace Temp with Query extracts the expression assigned to a temp variable into its own method, making the code more readable and reusable.

Question 3

In the context of code quality metrics, what does 'cognitive complexity' measure?

Accepted Answer

How difficult code is to understand due to control flow nesting and branching

Answer

Cognitive complexity measures how hard code is for a human to understand, penalizing nested control structures and non-linear flow.

Question 4

Which design smell describes a class that knows too much about another class's internal structure?

Accepted Answer

Inappropriate Intimacy

Answer

Inappropriate Intimacy occurs when a class accesses too many internal details of another class, violating encapsulation.

Question 5

When applying the 'Decompose Conditional' refactoring, what happens to complex if-else logic?

Accepted Answer

The condition and branches are extracted into separate named methods

Answer

Decompose Conditional extracts the condition expression and each branch into well-named methods to clarify intent.

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