Patterns in Spring & JDK

Design Patterns & LLDTopic 7 of 102 questions

Q1Where does Spring and the JDK already use GoF design patterns

Spring and the JDK are patterns in disguise: Factory for beans, Singleton scope, Proxy for @Transactional, Template Method for JdbcTemplate, Observer for events, and Iterator plus Strategy throughout the JDK.

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Q2Inversion of Control (IoC), how Spring implements it, DI vs Dependency Lookup, and the three DI types

Inversion of Control means the framework creates and wires your objects, and Dependency Injection is how it hands those dependencies to you.

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