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Browse Courses35. What are design patterns? Design patterns are reusable solutions to common software design problems. Examples: Singleton, Factory, Observer. 36. Explain the Singleton design pattern. Restricts a class to one instance and provides a global access point to it. java CopyEdit class Singleton { private static Singleton instance; private Singleton() () public static Singleton […]
12. Describe the access modifiers in Java. Public: Accessible everywhere. Protected: Accessible within the same package and subclasses. Default: Accessible within the same package only. Private: Accessible within the same class only. 13. What is encapsulation? How is it implemented in Java? Encapsulation is bundling data (variables) and methods into a single unit (class). […]
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