1Z0-898 무료 덤프문제 온라인 액세스

An application that uses pessimistic locking calls an updateData method that results in a LockTimeoutException being thrown. What three statements are correct? (Choose three)

• A.The current statement is rolled back.
• B.The current transaction is rolled back.
• C.The current transaction continues.
• D.The LockTimeoutException can be caught, and the updateData method retried.
• E.The current statement continues.
• F.The LockTimeoutException can NOT be caught.

It a Persistence application locks entity x with a pessimistic lock, which statement is true?

• A.A Persistenceprovider will obtain the lock when the entity is refreshed from the database.
• B.Persistence provider can defer obtaining the lock until the next synchronization of an entity to the database.
• C.If a lock cannot be obtained, the Persistence provider must throw an exception.
• D.A Persistence provider is not required to support the LockModeType. PESSIMISTIC_WRITE locking type.

The department entity has a unidirectional OneToMany relationship to the employee entity. The developer wants to model this relationship as a java.util.map such that the key of map is true employee name. The primary key of the Employees entity is empId, an integer.
Which of the following is correct?

• A.@OneToMany @MapKeyJoinColumn (name = "name") map <String, Employee> employees;
• B.@OneToMany (targetEntity = Employee.class)
  @MapKeyClass (string.class)
  map employees;
• C.@OneToMany @mapKey (name, "name") map < integer, Employee> Employees;
• D.@OneToMany @mapsId (name = "name") map <String, Employee> employees;

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

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

Given two entities with many-to-many bidirectional association between them: What set of annotations correctly defines the association?

• A.@manyToMany ()targetEntity = project.class) on the projects field,
  @manyToMany (mappedBy = "projects") on the emps field
• B.@manyToMany (targetEntity = Project.class) on the projects field,
  @manyToMany on the emps field
• C.@manyToMany on the projects field,
  @manyToMany (mappedBy= "projects") on the emps field
• D.@manyToMany (mappedBy = emps) on the projects field,
  @manyToMany on the emps field