Problem 1
State which of the following are true and which are false. If false, explain why. a) Data associated with an entity EJB typically is stored in a relational database. b) The remote interface for an entity EJB represents the database table with which the EJB is associated. c) Entity EJBs that use bean-managed persistence require the deployer to specify SQL queries for inserting, updating, deleting and querying data from the database. d) The create methods in the home interface for an entity EJB insert new records into the underlying database. e) Entity EJBs should obtain necessary resources in method ejbcreate. f) Entity EJBs that use container-managed persistence must implement interface CMPEntityBean, whereas those that use bean-managed persistence must implement interface EntityBean
Problem 2
Fill in the blanks in each of the following: a) For entity EJBs that use ______ persistence to represent data in a relational database, the ______ must specify SQL queries when deploying the EJB. b) For entity EJBs that use ______ persistence to represent data in a relational database, the ______ must implement code that synchronizes data with the database. c) Each create method in the home interface must have a corresponding ______ method in the EJB implementation. d) If an entity EJB has a complex primary key, the developer must provide a custom ______ that represents the complex primary key.
