Aeolus Tyre India Opc Senior Software Engineer Interview Questions and Answers

String is immutable while StringBuffer is mutable.

• StringBuffer is faster for concatenation operations.

• StringBuffer has methods to modify the string.

• StringBuffer is thread-safe while String is not.

• StringBuffer has a larger memory footprint than String.

Explanation of internal structure of hashmap and hashing algorithm

• Hashmap is a data structure that stores key-value pairs using a hash function

• Hashing algorithm converts the key into an index in the array

• Collisions can occur when two keys map to the same index

• Chaining and open addressing are two methods to handle collisions

• Load factor determines when to resize the hashmap

Predicate is a functional interface that takes an argument and returns a boolean value. Supplier is a functional interface that takes no argument and returns a value.

• Predicate is used for filtering or testing a condition on an object.

• Supplier is used for providing a value or generating a value.

• Predicate takes an argument and returns a boolean value based on the condition.

• Supplier takes no argument and returns a value.

• E...read more

Dependency Injection in .NET is a design pattern that promotes loose coupling and enhances testability by injecting dependencies.

• Promotes loose coupling by separating the creation of an object from its usage.

• Facilitates easier unit testing by allowing mock dependencies to be injected.

• Commonly used with interfaces to define contracts for services.

• Example: Using constructor injection to provide a service to a controller ...read more