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問題 #1

A session bean business method invokes UserTransaction.setRollbackonly and receives an IllegalStateException.
Under which circumstance can this happen?

A. The setRollbackOnly method is invoked within a bean-managed transaction, and userTransaction.commit has NOT been invoked.
B. The bean is using bean-managed transactions regardless of whether there is an active transaction.
C. There is no circustance that would cause setRollbackOnly to throw an IllegalStateException.
D. The bean is using bean managed transaction demarcation, and uaerTransaccion.begin has been invoked.

問題 #2

The developer wants to define a unidirectional relationship from the customer entity to the order entity and map this relationship using a foreign key mapping strategy.
Which one of the pairs of classes below correctly achieves this task?

A. @Entity public class Customer {
@Id int customerId;
@OneToMany @JoinColumn (name = "CUST_ID") Set <Order> orders;
. . .
}
@Entity public class order {
@Id int orderId;
. . .
}
B. @Entity public class Customer {
@Id int customerId;
@OneToMany Set <Order> orders;
. . .
}
@Entity
@JoinColumn (names = "CUST-ID", referencedColumnName = "customerId")
public class order {
@Id int order Id;
. . .
}
C. @ Entity public class Customer {
@Id int customerId;
@OneToMany (JoinColumn = @JoinColumn (name = "CUST_ID"), table = ""ORDER) Set
<Order> orders;
. . .
}
@Entity public class order {
@Id int orderId;
. . .
}
D. @Entity public class Customer {
@Id int customerId;
@OneToMany (JoinColumn = @joinColumn (name = "CUST_ID") Set <Order> orders;
. . .
}
@Entity public class order {
@Id int orderId;
. . .
}

問題 #3

Given the following entity classes:
@Entity
@cacheable (true)
Public class A { . . . } @Entity
@cacheable (false)
Public class B { . . .}
@Entity
Public class C { . . . }
If the shared-cache-mode element of persistence.xml is set to ENABLE _SERVICE, which entities are cached when using a persistence provider that supports caching?

A. A only
B. A and B
C. A, B, and C
D. A and C

問題 #4

A user entity is retrieved in a query and stored in an instance variable user. The user entity has a single valued name property that uses the mapping defaults, and a photo property, which is lazily loaded. The application then calls the following method:
PersistenceUtil.isLoaded (user);
Which two of the following statements are correct?

A. The name property was loaded from the database.
B. The photo property was loaded from the database.
C. The photo property was NOT loaded from the database.
D. The photo property may or may not have been loaded from the database.
E. The name property was NOTbeloaded from the database.
F. The name property may or may not have been loaded from the database.

問題 #5

Given the following stateless session bean implementation classes:

Assuming no other transaction-related metadata, what are the transaction attributes on methodB, and methodC respectively?

A. MANDATORY, MANDATORY, and MANDATORY
B. REQUIRED, MANDATORY, andREQUIRES_NEW
C. REQUIRED, REQUIRES_NEW, and REQUIRES_NEW
D. MANDATORY, MANDATORY, <and REQUIRES__NEW

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