FREE CAD Code Refactoring and Quality Questions and Answers

Question 1

An agile developer is reviewing a colleague's code and notices a method with a very long parameter list. This is a classic example of what?

Accepted Answer

A code smell

Answer

A feature envy

Answer

Technical debt

Answer

A failed unit test

Question 2

According to Martin Fowler, what is the primary definition of code refactoring?

Accepted Answer

Changing the internal structure of software without changing its external behavior.

Answer

Fixing bugs and improving the user interface.

Answer

Rewriting a large module from scratch to improve performance.

Answer

Adding new functionality while simultaneously cleaning up old code.

Question 3

A team is about to add a new feature to their application. They notice the existing code in that area is complex and hard to understand. To make adding the new feature easier, they first restructure the existing code. This is an example of which refactoring strategy?

Accepted Answer

Preparatory Refactoring

Answer

Red-Green-Refactor

Answer

Refactoring by Abstraction

Answer

Composing Methods

Question 4

Which of the following is a primary goal of code refactoring in an agile environment?

Accepted Answer

To reduce technical debt and improve maintainability.

Answer

To achieve 100% code coverage with unit tests.

Answer

To reduce the number of user stories in the backlog.

Answer

To eliminate the need for a dedicated QA team.

Question 5

During a sprint, a developer needs to make a change. According to Kent Beck's 'two hats' metaphor, what should the developer do first if the required change is difficult to implement in the current code structure?

Accepted Answer

Switch to the 'refactoring hat' to make the change easy, then switch to the 'adding function hat' to make the easy change.

Answer

Implement the change using the quickest possible hack and create a new story to fix it later.

Answer

Ask the Product Owner to de-prioritize the feature until the architecture can be properly redesigned.

Answer

Perform the refactoring and the functional change in a single, large commit to ensure they are linked.

Question 6

A team is using the Red-Green-Refactor technique. They have just written the minimum amount of code required to make a failing test pass. What is the immediate next step?

Accepted Answer

Look for opportunities to improve the code's design and eliminate duplication.

Answer

Write the next failing test for another piece of functionality.

Answer

Merge the code into the main branch to get feedback.

Answer

Deploy the working code to a staging environment for QA testing.