Refactoring & Version Control

Question 1

Give examples of version control systems

Answer 1

git, mercurial, svn

Question 2

What are the benefits of implementing a version control system

Answer 2

Ability to track changes made by developers
Roll back commits
Allows multiple developers to produce for software in parallel
Avoids lost updates and overwritees

Question 3

What are the features of a VCS

Answer 3

Files stored in central repository
Files checked out to local machine
Send updated files to repository
Highlight changes to files
maintains states for regression
maintains a log of changes and updates

Question 4

What is refactoring

Answer 4

The process of improving code through analysis and the restructuring of code through simplification

Question 5

Describe the refactoring process

Answer 5

test existing code
apply refactoring
re-test

Question 6

What does refactoring achieve

Answer 6

better use of OO techniques
breaking down large methods
grouping related data and methods into class structures
allows for code reuse

Question 7

What are some of the refactoring methods

Answer 7

extract method

inline temp

Question 8

What are code smells

Answer 8

potential problems in code

Question 9

Name indicators of “smelly” code

Answer 9

duplicated code
long methods
large classes
feature envy where a class uses methods of another class
Refused bequest where a class overrides a base method using a method that is not related to the original
Contrived complexity