Deloitte Java Spring Boot Developer Interview Questions and Answers

Functional interfaces provide clarity and enforce single abstract method constraint.

• Functional interfaces provide clarity to developers by explicitly indicating that the interface is intended to be used as a functional interface.

• Using @FunctionalInterface annotation helps enforce the single abstract method constraint, preventing accidental addition of more abstract methods.

• It also allows the compiler to perform additio...read more

Comparable is an interface in Java used for comparing objects and sorting collections.

• Comparable interface is used to define a natural ordering of objects.

• To implement Comparable, a class must implement the compareTo() method.

• Example: Implementing Comparable interface in a class to compare instances based on a specific attribute.