Question 1

An object of type ________ is used to manage the data flow between the program and the database.

Accepted Answer

A)  XE "Interfaces:EntityManager" XE "EntityManager interface" EntityManager 
B)  XE "Interfaces:EntityManagerFactory" XE "EntityManagerFactory interface" EntityManagerFactory XE "Classes:Persistence" XE "Persistence class" 
C)  Persistence 
D)  XE "Interfaces:TypedQuery" XE "TypedQuery interface" TypedQuery 
A)  XE "Interfaces:EntityManager" XE "EntityManager interface" EntityManager 
B)  XE "Interfaces:EntityManagerFactory" XE "EntityManagerFactory interface" EntityManagerFactory XE "Classes:Persistence" XE "Persistence class" 
C)  Persistence 
D)  XE "Interfaces:TypedQuery" XE "TypedQuery interface" TypedQuery A

Question 2

For entity classes in JPA, an @NamedQueries annotation specifies a collection of ________ annotations that declare various named queries.

Accepted Answer

A)  @Entity-Specifies that the class is an XE "entity class" entity class. 
B)  @Table-Specifies the entity class's corresponding database table. 
C)  @NamedQuery 
D)  None of the above. 
A)  @Entity-Specifies that the class is an XE "entity class" entity class. 
B)  @Table-Specifies the entity class's corresponding database table. 
C)  @NamedQuery 
D)  None of the above. C

Question 3

When you define a query in your own code, it's known as a(n) ________ query.

Accepted Answer

A)  dynamic 
B)  static 
C)  active 
D)  passive 
A)  dynamic 
B)  static 
C)  active 
D)  passive A

Question 4

Which of the following statements about JPA database transaction processing is false?

Accepted Answer

A)  Transaction processing enables a program that interacts with a database to treat a set of operations as a single operation. Such an operation also is known as an atomic operation or a transaction. 
B)  At the end of a transaction, a decision can be made either to commit the transaction or roll back the transaction. 
C)  Committing a transaction finalizes the database operation(s); all insertions, updates and deletions performed as part of the transaction cannot be reversed. 
D)  Rolling back the transaction leaves the database in its state prior to the database operation. This is useful when a portion of a transaction fails to complete properly. 
A)  Transaction processing enables a program that interacts with a database to treat a set of operations as a single operation. Such an operation also is known as an atomic operation or a transaction. 
B)  At the end of a transaction, a decision can be made either to commit the transaction or roll back the transaction. 
C)  Committing a transaction finalizes the database operation(s); all insertions, updates and deletions performed as part of the transaction cannot be reversed. 
D)  Rolling back the transaction leaves the database in its state prior to the database operation. This is useful when a portion of a transaction fails to complete properly.

Question 5

Which of the following statements is false?

Accepted Answer

A)  For certain types of projects, NetBeans automatically includes JPA support, but not for simple Java Application projects. 
B)  NetBeans projects do not include database drivers by default. 
C)  Each Java Enterprise Edition (Java E
E)  API-such as JPA-has a reference implementation that you can use to experiment with the API's features and implement applications. 
D)  The JPA reference implementation-which is included with the NetBeans Java EE version-is NetBeansLink. 
A)  For certain types of projects, NetBeans automatically includes JPA support, but not for simple Java Application projects. 
B)  NetBeans projects do not include database drivers by default. 
C)  Each Java Enterprise Edition (Java E
E)  API-such as JPA-has a reference implementation that you can use to experiment with the API's features and implement applications. 
D)  The JPA reference implementation-which is included with the NetBeans Java EE version-is NetBeansLink.

Question 6

Which of the following JPA-related statements in false?

Accepted Answer

A)  An object that implements the TypedQuery generic interface performs queries and returns a collection of matching entities. 
B)  To create queries, you can use EntityManager methods. 
C)  The Java Persistence Query Language (JPQL) is quite similar to SQL. 
D)  JPQL is optimized for dealing with relational database tables, rather than entity objects. 
A)  An object that implements the TypedQuery generic interface performs queries and returns a collection of matching entities. 
B)  To create queries, you can use EntityManager methods. 
C)  The Java Persistence Query Language (JPQL) is quite similar to SQL. 
D)  JPQL is optimized for dealing with relational database tables, rather than entity objects.

Question 7

When you used JPA in this chapter, you interacted with an existing database via classes that the NetBeans IDE generated from the XE "database schema" database's schema. You used the NetBeans Entity Classes from Database… option to add to your project classes that represented the database tables. Together, these classes and the corresponding settings are known as a ________ unit.

Accepted Answer

A)  perseverance 
B)  perpetual 
C)  sticky 
D)  persistence. 
A)  perseverance 
B)  perpetual 
C)  sticky 
D)  persistence.

Question 8

Which of the following JPA-related statements is false?

Accepted Answer

A)  You can update an existing entity by modifying its entity object in the context of a transaction. 
B)  Once a transaction is committed, the changes to the entity are saved to the database. 
C)  You can delete an existing entity. 
D)  When you commit a transaction the entity is kept as a backup in the database. 
A)  You can update an existing entity by modifying its entity object in the context of a transaction. 
B)  Once a transaction is committed, the changes to the entity are saved to the database. 
C)  You can delete an existing entity. 
D)  When you commit a transaction the entity is kept as a backup in the database.

Question 9

The first argument to EntityManager's XE "EntityManager interface:createQuery method" XE "createQuery method of interface EntityManager" createQuery method is a String written in ________.

Accepted Answer

A)  JPL 
B)  JavaQL 
C)  JPQL 
D)  None of the above. 
A)  JPL 
B)  JavaQL 
C)  JPQL 
D)  None of the above.

Question 10

In JPA transaction processing, if the operations execute successfully, you call EntityTransaction method _______ to commit the changes to the database. If any operation fails, you call EntityTransaction method ________ to return the database to its state prior to the transaction.

Accepted Answer

A)  apply, rollback 
B)  commit, restore 
C)  apply, restore 
D)  commit, rollback 
A)  apply, rollback 
B)  commit, restore 
C)  apply, restore 
D)  commit, rollback

Question 11

In JPA, when you compile the entity classes, the compiler looks at the annotations and adds JPA capabilities that help manage the interactions with the database-this is known as ________ capabilites.

Accepted Answer

A)  implanting 
B)  injecting 
C)  infusing 
D)  instilling 
A)  implanting 
B)  injecting 
C)  infusing 
D)  instilling

Question 12

Which of the following statements related to JPA is false?

Accepted Answer

A)  The Java Persistence API (JP
A)  maps Java classes to relational database tables and objects of those classes to rows in the tables. This is known as object-relational mapping. 
B)  You can use the NetBeans IDE's object-relational mapping tools to select a database and autogenerate classes that use JPA to interact with that database. Your programs can then use those classes to query the database, insert new records, update existing records and delete records. 
C)  Unlike JDBC, you will have to create mappings between your Java code and database tables, and you'll be able to perform complex database manipulations directly in Java. 
D)  JPA can be used with any database management system that supports JDBC. 
A)  The Java Persistence API (JP
A)  maps Java classes to relational database tables and objects of those classes to rows in the tables. This is known as object-relational mapping. 
B)  You can use the NetBeans IDE's object-relational mapping tools to select a database and autogenerate classes that use JPA to interact with that database. Your programs can then use those classes to query the database, insert new records, update existing records and delete records. 
C)  Unlike JDBC, you will have to create mappings between your Java code and database tables, and you'll be able to perform complex database manipulations directly in Java. 
D)  JPA can be used with any database management system that supports JDBC.

Question 13

With JPA, as part of a persistence unit, the IDE also creates a ________ package in the Source Packages folder.

Accepted Answer

A)  META-DATA 
B)  PERSISTENCE-INF 
C)  PU 
D)  META-INF 
A)  META-DATA 
B)  PERSISTENCE-INF 
C)  PU 
D)  META-INF

Question 14

The JPA annotation @Basic specifies whether the column is optional and whether the corresponding data should loaded ________ (i.e., only when the data is accessed through the entity object) or ________ (i.e., loaded immediately when the entity object is created).

Accepted Answer

A)  lazily, actively 
B)  slowly, eagerly 
C)  lazily, eagerly 
D)  idly, actively 
A)  lazily, actively 
B)  slowly, eagerly 
C)  lazily, eagerly 
D)  idly, actively

Question 15

Which f the following JPA-related statements is false?

Accepted Answer

A)  You can use XE "Interfaces:EntityManager" XE "EntityManager interface" EntityManager method XE "EntityManager interface:getTransaction method" XE "getTransaction method of interface EntityManager" getTransaction to get the EntityTransaction that manages the transaction. 
B)  You can use EntityTransaction method XE "EntityTransaction interface:begin method" XE "begin method of interface EntityTransaction" begin to start the transaction. 
C)  You can use XE "Interfaces:EntityManager" XE "EntityManager interface" EntityManager method apply to insert a new entity into the database. 
D)  You call EntityTransaction method XE "EntityTransaction interface:commit method" XE "commit method of interface EntityTransaction" commit to commit the changes to the database. 
A)  You can use XE "Interfaces:EntityManager" XE "EntityManager interface" EntityManager method XE "EntityManager interface:getTransaction method" XE "getTransaction method of interface EntityManager" getTransaction to get the EntityTransaction that manages the transaction. 
B)  You can use EntityTransaction method XE "EntityTransaction interface:begin method" XE "begin method of interface EntityTransaction" begin to start the transaction. 
C)  You can use XE "Interfaces:EntityManager" XE "EntityManager interface" EntityManager method apply to insert a new entity into the database. 
D)  You call EntityTransaction method XE "EntityTransaction interface:commit method" XE "commit method of interface EntityTransaction" commit to commit the changes to the database.

Question 16

An object that implements the EntityManager ________ manages the interactions between a program and the database.

Accepted Answer

A)  interface 
B)  class 
C)  enumeration 
D)  None of the above. 
A)  interface 
B)  class 
C)  enumeration 
D)  None of the above.

Exam 27: Java Persistence Api Jpa

An object of type ________ is used to manage the data flow between the program and the database.

For entity classes in JPA, an @NamedQueries annotation specifies a collection of ________ annotations that declare various named queries.

When you define a query in your own code, it's known as a(n) ________ query.

Which of the following statements about JPA database transaction processing is false?

Which of the following statements is false?

Which of the following JPA-related statements in false?

Which of the following JPA-related statements is false?

The first argument to EntityManager's XE "EntityManager interface:createQuery method" XE "createQuery method of interface EntityManager" createQuery method is a String written in ________.

In JPA transaction processing, if the operations execute successfully, you call EntityTransaction method _______ to commit the changes to the database. If any operation fails, you call EntityTransaction method ________ to return the database to its state prior to the transaction.

In JPA, when you compile the entity classes, the compiler looks at the annotations and adds JPA capabilities that help manage the interactions with the database-this is known as ________ capabilites.

Which of the following statements related to JPA is false?

With JPA, as part of a persistence unit, the IDE also creates a ________ package in the Source Packages folder.

The JPA annotation @Basic specifies whether the column is optional and whether the corresponding data should loaded ________ (i.e., only when the data is accessed through the entity object) or ________ (i.e., loaded immediately when the entity object is created).

Which f the following JPA-related statements is false?

An object that implements the EntityManager ________ manages the interactions between a program and the database.

Introduction to Computers, the Internet and Java

Introduction to Java Applications; Inputoutput and Operators

Introduction to Classes, Objects, Methods and Strings

Control Statements: Assignment, and Operators

Control Statements: Logical Operators

Methods: a Deeper Look

Arrays and Arraylists

Classes and Objects: a Deeper Look

Object-Oriented Programming: Inheritance

Object-Oriented Programming: Polymorphism and Interfaces

Exception Handling: a Deeper Look

Javafx Graphical User Interfaces

Javafx Gui

Strings, Characters and Regular Expressions

Files, Inputoutput Streams, Nio and Xml Serialization

Generic Collections

Lambdas and Streams

Recursion

Searching, Sorting and Big O

Generic Classes and Methods: a Deeper Look

Custom Generic Data Structures

Concurrency

Accessing Databases With Jdbc

Swing Gui Components

Graphics and Java 2d

Networking

Javaserver Faces Web Apps

Javaserver Faces Web Apps

Swing Gui Components

Filters

In JPA transaction processing, if the operations execute successfully, you call EntityTransaction method _ to commit the changes to the database. If any operation fails, you call EntityTransaction method __ to return the database to its state prior to the transaction.

The JPA annotation @Basic specifies whether the column is optional and whether the corresponding data should loaded (i.e., only when the data is accessed through the entity object) or (i.e., loaded immediately when the entity object is created).