Modern Java · interview question
Which pattern is effectively implemented when using enums to represent singletons?
Multiple choiceHardchapter-7-curatedpremiummodern-javaenums
enum Singleton {
INSTANCE;
void performAction() { /* implementation */ }
}Answer and explanation
Correct answer
A. Singleton pattern
Why
Using an enum to represent a singleton is a robust way to implement the Singleton pattern. It provides serialization safety and ensures a single instance even in the presence of multiple class loaders.
Test yourself on Modern Java
A free test with instant, explained results. No account needed.
More Modern Java questions
- Given an enum with a method, how can each constant have a different implementation of that method?
- What keyword is used to define a Java Record?
- How can you iterate over all constants of an enum in Java?
- When designing a domain model, why should you be cautious about using records for classes with business logic?
- How can the use of enums improve the clarity of domain models in Java?
- When is a Java Record usually the better choice than a traditional class?