Mendix Advanced Certificate Exam Questions and Answers

Mendix Advanced Certificate Exam Questions and Answers

1. What is a Persistable entity?: An Entity that can be saved in the database. 2. What is a Non-Persistable entity?: An entity that can only be saved in runtime memory. 3. What is a Generalized entity?: An entity that lends its attributes, associations, event handlers, validation rules and any other properties to another entity. 4. What is a Specialized entity?: An entity that inherits all or part of its attributes, associations, event handlers, validation rules and any other properties from another entity. 5. what are the system member properties?: CreatedDate, ChangedDate, Own- er, ChangedBy 6. How do you show multiple specialized entities in the same list view?: By adding a template for every specialized entity while using the default for the gener- alized entity. 7. What do you need to do after an Object type decision?: Cast to entity to the correct specialization. 8. What should you do if the Object type decision is empty?: Create a log message, since this is unexpected behavior. 9. Why should you use inheritence?: It allows you to make reusable microflow, which increases the consistency and maintainability of your app. 10. when should you use a 1-1 association over inheritance?: when the entity in question isn't a true specialization of the generalized entity and/or the generalized entity's properties are not required when dealing with the entity in question. 11. Why is creating a new entity and making it a specialization of the FileDocu- ment or Image entity preferred over using original entities?: The original entities are part of the System module, which makes them ineditable. 12. What indicates ownership over an association.: A dot on that entity's side of the association. 13. Why is the main downside of a *-* association: It uses a lot more memory that other associations. 14. What is an index?: An extra table for a given entity in the database with ID's and a specified attribute(s) in a sorted order which allows for faster queries. 15. When do you use an index?: On entities with a lot of objects that are read more than written and on the most searched attributes, that also have many possibilities. 16. What is the downside of an index?: every time an object is added, the entire index table needs to be updated, which can potentially cause performance issues. 17. What are the 4 stages of a domain model restructering?: 1. extend your domain model 2. model the data conversion