design patterns

Question 1

What are three types of patterns in GOF catalog?

Answer 1

1. creational
2. structural
3. behavioral

Question 2

What are creational patterns?

Answer 2

Creational patterns tackle how you handle creating new objects.

Clone existing objects if the new object is similar to an existing one.

Question 3

What are examples of creational patterns?

Answer 3

Singleton

Question 4

What are structural patterns?

Answer 4

Structural patterns describes how objects are connected to each other.

Like which ingredients should be paired together and how much dependence between them.

Question 5

What are behavioral patterns?

Answer 5

Behavioral patterns focus on how objects distribute work.

They describe how each object does a single cohesive function.

Question 6

What are characteristics of the singleton feature?

Answer 6

1. enforces one and only one object of a singleton class
2. has the singleton object globally accessible