Oracle 1Z0-898

Free Questions in OTE format

About Oracle 1Z0-898 dump

Overview of the Java Persistence API

• Describe the basics of Object Relational Mapping (ORM)
  
• Define the key concepts of the Java Persistence API (entity, entity manager, and persistence unit)
  

Introducing the Auction Application

• Describe the auction application
  
• Define the domain objects of the auction application
  
• Describe the implementation model for the auction system
  

Java Persistence API Entities

• Describe the difference between objects and entities
  
• Describe the difference between persistent fields and properties
  
• Identify and use common Java Persistence API annotations, such as @Entity, @Id, @Table, and @Column
  

Understanding the Entity Manager

• Describe the relationship between an entity manager, a persistence context, and a persistence unit
  
• Describe the difference between a container-managed entity manager and an application-managed entity manager
  
• Describe the entity life cycle
  

Modeling Entity Relationships

• Examine association relationships in the data and object models
  
• Use relationship properties to define associations
  
• Implement one-to-one unidirectional associations
  
• Implement one-to-one bidirectional associations
  
• Implement many-to-one/one-to-many bidirectional associations
  
• Implement many-to-many bidirectional associations
  
• Implement many-to-many unidirectional associations
  
• Examine fetch and cascade mode settings
  

Entity Inheritance and Object-Relational Mapping

• Examine entity inheritance
  
• Examining object/relational inheritance hierarchy mapping strategies
  
• Inherit from an entity class
  
• Inherit using a mapped superclass
  
• Inherit from a non-entity class
  
• Examine inheritance mapping strategies
  
• Use an embeddable class
  

Persisting Enums and Collections

• Persist entities that contain enums with @Enumerated
  
• Persist entities that contain lists with @ElementCollection
  
• Persist entities that contain maps with @ElementCollection
  

Introduction to Querying

• Find an Entity by its primary key
  
• Understand basic Java Persistence API query language queries
  
• Understand native SQL queries
  
• Understand basic Criteria API queries
  

Using the Java Persistence API Query Language

• Examine the Java Persistence API query language
  
• Create and use the SELECT statement
  
• Create and use the UPDATE statement
  
• Create and use the DELETE statement
  

Using the Java Persistence API Criteria API

• Contrast queries that use the Criteria API with queries that use the Java Persistence query language
  
• Describe the metamodel object approach to querying
  
• Create Criteria API queries
  

Using the Java Persistence API in a Container

• Use the Java Persistence API from a servlet
  
• Use the Java Persistence API from a stateless session bean
  

Implementing Transactions and Locking

• Describe the transaction demarcation management
  
• Implement container-managed transactions (CMT)
  
• Interact programmatically with an ongoing CMT transaction
  
• Implement bean-managed transactions (BMT)
  
• Apply transactions to the Java Persistence API
  

Advanced Java Persistence API Concepts

• Specify composite primary keys
  
• Override mappings with the @AttributeOverride and @AssociationOverride annotations
  
• Understand entity listeners and callback methods