#oops

Articles tagged with #oops

Builder Design Pattern
Why Builder Pattern Exists When creating complex objects, constructors can become messy. Example: User user = new User("Souvik", 25, "Kolkata", "India", "Developer", true, false); Problems: Hard to
Mar 3, 20264 min read6
Observer Design Pattern
Why Observer Pattern Exists In real systems, objects often depend on other objects’ state changes. Examples: When stock price changes → update dashboards When order is placed → send email + SMS + up
Mar 3, 20264 min read
Strategy Design Pattern
Why Strategy Pattern Exists In real applications, we often need to change behavior at runtime. Examples: Different payment processing logic Different discount calculation strategies Different sorti
Mar 3, 20264 min read2
Factory Design Pattern
Why Factory Pattern Exists When building applications, we often create objects based on some condition. Example: Payment type (UPI, Credit Card, NetBanking) Notification type (Email, SMS) Vehicle t
Mar 3, 20264 min read2
Singleton Pattern
Design Pattern for Interviews
Mar 3, 20264 min read6