Design Principles

Question 1

What is Coupling?

Answer 1

Question 2

What is the difference between High/strong coupling, medium coupling, and low coupling?

Answer 2

Question 3

What does low coupling lead to? What does high coupling lead to?

Answer 3

Question 4

What is cohesion?

Answer 4

Question 5

What is the difference between low cohesion and high cohesion?

Answer 5

Question 6

What is the difference between high coupling/low cohesion and low coupling / high cohesion? Which is more desireable?

Answer 6

Question 7

What does it mean to encapsulate what varies?

Answer 7

Question 8

What is the duck-hunt example of encapsulate what varies?

Answer 8

Question 9

Example of encapsulate what varies:

Answer 9

Question 10

What are the benefits of encapsulating what varies?

Answer 10

Question 11

What does it mean to “Code to and Interface, Not an Implementation”?

Answer 11

Question 12

“Code to an Interface, Not an Implementation” example:

Answer 12

Question 13

What are the benefits of “Code to an Interface, Not an Implementation”?

Answer 13

Question 14

What does it mean to “Favour Composition Over Inheritance”?

Answer 14

Question 15

What kind of relationship does “Favour Composition Over Inheritance” establish? What kind of relationahip does “composition/aggregation” establish?

Answer 15

Question 16

What are the benefits of “Favour Composition Over Inheritance”?

Answer 16

Question 17

What is the rule of thumb with “Favour Composition Over Inheritance”?

Answer 17

Question 18

What is Composition?

Answer 18

Question 19

What is important to note about Composition?

Answer 19

Question 20

What is Aggregation? What is the difference between Composition and Aggregation?

Answer 20

Question 21

What are the SOLID Design Principles?

Answer 21

Question 22

What is the SOLID: Single Responsibility Principle?

Answer 22

Question 23

What is a good way to tell that you should be using the SOLID: Single Responsibility Principle?

Answer 23

Question 24

What are the benefits of the SOLID: Single Responsibility Principle?

Answer 24

Question 25

What is the SOLID: Open/Closed Principle?

Answer 25

Question 26

What does it mean for a Class to be Open for extension, but closed for modification?

Answer 26

Question 27

Example of the SOLID: Open/Closed Principle

Answer 27

Question 28

What are the benefits of the SOLID: Open/Closed Principle?

Answer 28

Question 29

What is the SOLID: Liskov Substitution Principle?

Answer 29

Question 30

Example of the SOLID: Liskov Substitution Principle

Answer 30

Question 31

Go through the ‘class rectangle’ example of the SOLID: Liskov Substitution Principle

Answer 31

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Question 32

What is the SOLID: Interface Segregation Principle?

Answer 32

Question 33

Example of the SOLID: Interface Segregation Principle:

Answer 33

Question 34

Continued example of the SOLID: Interface Segregation Principle

Answer 34

Question 35

What is the bottom line and solution for the SOLID: Interface Segregation Principle?

Answer 35

Question 36

What is the SOLID: Dependency Inversion Principle

Answer 36

Question 37

SOLID: Dependency Inversion Principle example:

Answer 37

Question 38

Continued example of the SOLID: Dependency Inversion Principle. What does it mean for a system to be fragile and rigid?

Answer 38