Basics

Question 1

Why is productivity decreasing during development?

Answer 1

Increasing complexity

Question 2

What is software entropy?

Answer 2

• difficult and costly to maintain

→ highly unpredictable

Question 3

What are (4) attributes of bad code?

Answer 3

1. Ridid
2. Fragile
3. Inseparable
4. Opaque

Question 4

What does rigid code mean?

Answer 4

One single modification requests modification of many modules

Question 5

What does fragile code mean?

Answer 5

One modification breaks the whole system

Question 6

What does inseparable code mean?

Answer 6

One module can’t be reused without using many others

Question 7

What is opaque code?

Answer 7

During reading it’ts not clear what the code is doing and how

Question 8

What are (3) reasons for writing bad code?

Answer 8

1. Wrong priority (fast)
2. Wring attitude (lazy)
3. Missing knowledge

Question 9

What is the broken window effect and what does it mean for our code?

Answer 9

One broken window starts process toward decay.

→ never stop cleaning

Question 10

What are the (3) actions of code sense?

Answer 10

1. reading code
2. preparing code
3. testing code

Question 11

What is required for a code quality attitude (3)?

Answer 11

1. Knowledge (best practices)
2. Judgement
3. Dicipline (clean everyday)

Question 12

What are the two rules for writing good code?

Answer 12

1. Leave code cleaner that you found it

2. Write code for the future you

Question 13

What are the (4) steps of Test-Driven-Development?

Answer 13

1. Preparing test
2. Programming to pass test
3. Refactoring
4. Testing again

Question 14

What is refactoring?

Answer 14

Improving code structure without changing it’s behavior