SOLID

Question 1

What does “S” In SOLID stand for?

Answer 1

Single responsibility principle

Question 2

What does “O” In SOLID stand for?

Answer 2

Open/closed principle

Question 3

What does “L” In SOLID stand for?

Answer 3

Liskov substitution principle

Question 4

What does “I” In SOLID stand for?

Answer 4

Interface segregation principle

Question 5

What does “D” In SOLID stand for?

Answer 5

Dependency inversion principle

Question 6

Define Single responsibility principle

Answer 6

A class should have only a single responsibility (i.e. changes to only one part of the software’s specification should be able to affect the specification of the class)

Question 7

Define Open/closed principle

Answer 7

“software entities … should be open for extension, but closed for modification.”

Question 8

Define Liskov substitution principle

Answer 8

“objects in a program should be replaceable with instances of their subtypes without altering the correctness of that program.” See also design by contract

Question 9

Define Interface segregation principle

Answer 9

“many client-specific interfaces are better than one general-purpose interface.”

Question 10

Define Dependency inversion principle

Answer 10

one should “depend upon abstractions, [not] concretions.”

Question 11

How many design patterns are recognized by the Gang of Four

Answer 11

23

Question 12

Name the three categories of the Gang of Four design patterns

Answer 12

Creational, Structural, Behavioral

Question 13

Name the 5 Creational Patterns

Answer 13

Abstract Factory, Builder, Factory Method, Prototype, Singleton

Question 14

Name the 7 Structural Patterns

Answer 14

Adapter, Bridge, Composite, Decorator, Facade, Flyweight, Proxy

Question 15

Name the 11 Behavioral Patterns

Answer 15

Chain of responsibility, Command, Interpreter, Iterator, Mediator, Memento, Observer, State, Strategy, Template Method, Visitor