SOLID

Question 1

S

Answer 1

Single responsibility principle - 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 2

O

Answer 2

Open/closed principle - software entities should be open for extension, but closed for modification.

Question 3

L

Answer 3

Liskov substitution principle - objects in a program should be replaceable with instances of their subtypes without altering the correctness of that program.

Question 4

I

Answer 4

Interface segregation principle - many client-specific interfaces are better than one general-purpose interface.

Question 5

D

Answer 5

Dependency inversion principle - one should depend upon abstractions, not specific implementations.