Fendahl Technology Senior Consultant Interview Questions and Answers

Questions on abstract class vs interface, internal working of hashmap, and Java 8 features.

• Abstract class is a class that cannot be instantiated and can have both abstract and non-abstract methods.

• Interface is a collection of abstract methods and constants that can be implemented by a class.

• HashMap is a data structure that stores key-value pairs and uses hashing to retrieve values.

• Java 8 introduced features like lambda...read more