Coding design

Question 1

What is implementation

Answer 1

-writing the source code that is needed to realize the architecture and design.

Question 2

Three ways of managing the implementation process:

Answer 2

Version management (git)
Build system (Ant) - assembling automation
Issue tracking (JIRA) - keep track of bug reports.

Question 3

What are the 4 key implementation concepts:

Answer 3

Understandability
Testability
Reusability
Efficiency.

Question 4

Tips to write understandable code:

Answer 4

1. meaningful identifier names
2. Add comments
3. follow a coding style convention.

Question 5

Things to keep in mind for testability

Answer 5

More execution paths, more tests.

Question 6

Tips to make code more testable

Answer 6

1. Follow Test driven development (TDD) (Code must only be written to make a test case pass, and tests musts exist before the code can be written).
2. Test early and test often.

Question 7

What are the benefits of reusability?

Answer 7

Code reuse simplifies maintenance - bugs only need to be fixed in one place.
Code reuse accelerates development - less time reinventing the wheel.

Question 8

Tips for reusability

Answer 8

-DRY - don’t repeat yourself (use method calls)
-Increase Cohesion where possible (keeps related things together, and unrelated things out)
- Reduce coupling where possible (indication of interdependence accross modules)

Question 9

Tips to ensure efficiency:

Answer 9

Avoid recursion when possible.
study efficient search/sort algorithms.
Big O notation: measure the worst case time complexity of an algorithm.