DEVASC

Question 1

Waterfall Methodology Advantages

Answer 1

• Design errors are highlighted before any code is written, saving time during the implementation phase.
• Good documentation is mandatory for this kind of methodology. This effort is useful for engineers in the later stages of the process.
• Because the process is rigid and structured, it is easy to measure progress and set milestones.

Question 2

Waterfall Methodology Disadvantages

Answer 2

• In the very early stages of a project, it can be difficult to gather all the possible requirements. Clients can only fully appreciate what is needed when the application is delivered.
• It becomes very difficult (and expensive) to re-engineer the application, making this approach very inflexible.
• The product will only be shipped at the very end of the chain, without any middle phases to test. Therefore, it can be a very lengthy process.

Question 3

The TDD iteration is finished when…

Answer 3

code refactoring is done and all tests pass.

Question 4

What is the correct order of steps in a TDD iteration?

Answer 4

Step 1: Write tests; Step 2: Run tests (should fail); Step 3: Write code; Step 4: Run tests (should pass); Step 5: Refactor code.