Rafiki Marketing Interview Questions and Answers

Use a bean before it is destroyed by implementing a pre-destroy method

• Implement a method annotated with @PreDestroy in the bean class

• This method will be called before the bean is destroyed

• Perform any necessary cleanup or final operations in this method

Use @IdClass annotation to apply multiple primary keys to an entity in Hibernate

• Create a separate class for composite primary key

• Use @IdClass annotation on the entity class to reference the composite primary key class

• Define the primary key fields in both the entity class and the composite primary key class

Static and default methods in functional interfaces provide utility methods and default implementations for interface methods in real-time applications.

• Static methods in functional interfaces can be used for utility methods that are not tied to a specific instance of the interface.

• Default methods in functional interfaces provide default implementations for interface methods, allowing for backward compatibility when new methods are added to the interface.

• In real-time applicati...read more

Intermediate operators transform or filter the stream elements, while terminal operators produce a result or side effect.

• Intermediate operators include filter(), map(), sorted(), distinct(), etc.

• Terminal operators include forEach(), collect(), reduce(), count(), etc.

• Intermediate operators are lazy and do not execute until a terminal operator is called.

• Terminal operators trigger the stream processing and produce a result or side effect.

Use the POJO's attributes that define equals() and hashCode() methods as the key in the Hashmap.

• Ensure the POJO class overrides equals() and hashCode() methods.

• Create an instance of the POJO and use it as the key in the Hashmap.