Answer to Question #278727 in Web Development for Tom Boyle

Question

4. Object- Relational Mapping (ORM) deals with

a. matching each attribute of an object to its corresponding row in a database table

b. mapping objects in Object- Oriented Programming to relational data in a database

c. matching stubs of objects on a client to remote objects on a server.

d. mapping methods of client objects to remote stubs on a server.

5. Which pairing of words best represents a correpondence in the context of Java Persistence?

a. Class : Column

b. Table : Instance

c. Column : Entity

d. Object : Class

e. None of these answers.

6. Which of the following annotations applies to an Enterprise JavaBean class?

a. @Stateless

b. @Entity

c. None of these answers

d. @Id

e. @Named

Answer 1

4.

Object-relational mapping (ORM) is a programming technique in which a metadata descriptor is used to connect object code to a relational database. Object code is written in object-oriented programming (OOP) languages.

Answer: b. mapping objects in Object- Oriented Programming to relational data in a database

5.

Entity objects are not identified by contained values. Entity objects are identified by its own unique existance.

Answer: c. Column : Entity

6.

Answer: a. @Stateless

Specifies that a given EJB class is a stateless session bean.