1Z0-898 試験問題を無料オンラインアクセス

An entity person is mapped to a table PERSON and has a collection-valued persistence field otherUsedNames that stores names used by a person. The other used Names field is mapped to a separate table called NAMES. Which code fragment correctly defines such field?

• A.@ElementCollection
  @CollectionTable(names = "Names")
  Protected set<String> otherUsedNames = new HashSet () ;
• B.@Element collection
  @ElementTable (name = "NAMES")
  Protected set<String> otherUsedNames = new HashSet () ;
• C.@ElementCollection
  @SecondaryTable (names = "NAMES")
  Protected set<String> otherUsedNames = new HashSet () ;
• D.@ElementCollection (name = "NAMES")
  Protected set<String> otherUsedNames = new HashSet () ;

Which cascade option can be specified in a mapping descriptor so that it applies to all relationships in a persistent e unit?

• A.cascade all
• B.cascade remove
• C.cascade-persist
• D.cascade detach

A developer wants to create a Java Persistence query that will include a subquery.
Which three are true? (Choose three.)

• A.Subqueries can be used in a WHERE clause.
• B.Subqueries can be used in a FROM clause.
• C.The EXISTS expression can be used only with a subquery.
• D.The MEMBER expression can be used only with a subquery.
• E.The ANY expression can be used only with a subquery.

A developer needs to include a set of managed classes in a persistence unit. Which two solutions are correct? (Choose two.)

• A.Place the class files in the orm.xml file.
• B.Place the class files in any mapping file that is included on the classpath.
• C.Place the class files in the root of the persistence unit.
• D.Place the class files in any jar on the classpath that is included in the persistence unit.

Which EntityManager API will lock entity x with a pessimistic lock?

• A.em.lock(x, LockModeType.WRITE)
• B.em.lock(x, LockModeType.OPTIMISTIC_FORCE_INCREMENT)
• C.em.lock(x, LockModeType.PESSIMISTIC)
• D.em.lock(x, LockModeType.PESSIMISTIC_READ)