Design Patterns Intro

Question 1

Design Patterns

Answer 1

A design pattern is a well-described solution to a common software problem.

Question 2

Benefits of using Design Patterns

Answer 2

1. Design Patterns are already defined and provides industry standard approach to solve a recurring problem, so it saves time if we sensibly use the design pattern. 2. Using design patterns promotes reusability that leads to more robust and highly maintainable code. It helps in reducing total cost of ownership (TCO) of the software product. 3. Since design patterns are already defined, it makes our code easy to understand and debug. It leads to faster development and new members of team understand it easily.

Question 3

Three Types of Design Patterns

Answer 3

1. Creational Patterns
2. Structural Patterns
3. Behavioral Patterns

Question 4

Creational Patterns

Answer 4

Used to construct objects such that

they can be decoupled from their implementing system

Question 5

Structural Patterns

Answer 5

Used to form large object structures

between many disparate objects.

Question 6

Behavioral Patterns

Answer 6

Used to manage algorithms,

relationships, and responsibilities between objects.

Question 7

Object Scope

Answer 7

Deals with object relationships that can be

changed at runtime.

Question 8

Class Scope

Answer 8

Deals with class relationships that can be changed
at compile time.