Tài liệu 25 câu trắc nghiệm ejb

1 Which of the following are the main methods in java.sql.Connection interface that are used for handling transactions? 1. SetAutoCommit() 2. commit() 3. rollback() 1, 2 2, 3 1, 3 1, 2, 3 2 Which of the following methods of the javax.ejb.SessionSynchronization interface are used for handling transactions in the stateful session beans? 1. afterBegin() 2. beforeBegin() 3. afterCompletition(boolean committed) 4. beforeCompletition(boolean committed) 1, 2, 3 2, 3, 4 1, 3, 4 1, 2, 3, 4 3 The JMS API architecture is composed of which of the following parts? 1. JMS Provider 2. JMS Clients 3. Messages 4. Administered Objects 1, 2, 3 2, 3, 4 1, 3, 4 1, 2, 3, 4 4 A transacted session supports ____________________series of transaction. Single Multiple Double Triple 5 The identity of both stateful and stateless session beans can be compared using the _________ method. isIdentical() Identical() Compare() 6 The ________ method of the CMP Bean is called by the container to disassociate a bean from its environment. ejbRemove() unsetEntityContext() ejbPassivate() 7 _____________ are implemented differently in both CMP and BMP beans. Containers Container call back methods Instance of an entity bean 8 BNF schemas created using BNF symbols use these schemas to declare ________ in EJB QL. Queries Functions Relations 9 The _________ isolation anomaly occurs when data is changed between two consecutive reads by a transaction. Phantom Read Non-Repeatable Read Dirty Read 10 The _________ manages interactions between applications and the application server. Container Transaction manager CMT 11 The ___________ controls JDBC transactions using the commit () and rollback() methods. DBMS transaction manager DQL transaction manager Transaction server 12 The __________ field provides a way to correlate messages in a request/response type of setup. JMSCorrelationID JMSDestination JMSExpiration 13 In __________, J2EE architecture makes use of a Message-Driven bean for fulfilling the requests of the client. Resource facade Session fa?ade Message fa?ade 14 In __________, an end user is required to authenticate by providing necessary authentication data only when the user tries to access a secured resource. J2EE security architecture Lazy authentication Resource security 15 Which of the following method of Entity Beans is used to retrieve information from the database? retrieve finder remove home 16 Which of the following deployment descriptor contains the details about the classes and interfaces which compose an EJB application along with the persistence details in case of an Entity Bean? application.xml web.xml ejb.xml ejb-jar.xml 17 Which of the following exception is thrown if the container encounters a problem in searching a particular record? Finder Exception Duplicate Key Exception Remove Exception Create Exception 18 Which of the following behavioral UML diagram focuses on the type and order of messages passed between elements during execution? Sequence State Machine Timing Use Case 19 Which of the following ACID property specifies that each transaction should be allowed to execute independently? Atomicity Isolation Consistency Durability 20 Which of the following messaging domain models allow multiple applications or components to receive the same message? Point to Point Point to Publish Publish and Subscribe Point and Subscribe 21 EJB QL supports path navigation using a __________. Dot (.) Arrow (->) Hyphen (-) Equal to (=) 22 Which of the following are the properties of a transaction? 1. Isolation 2. Durability 3. Atomicity 4. Consistency 1, 2, 3 2, 3, 4 1, 3, 4 1, 2, 3, 4 23 Which of the following properties of a transaction ensures that each transaction should be allowed to execute independently without interference from other transactions or processes? Atomicity Consistency Isolation Durability 24 Which of the following components of the Transaction processing are EJB business methods which invoke transactions? Application Components Resource Managers Transaction Manager All of the above 25 ___________________transaction contains one main transaction with one or smaller transactions embedded within it. Flat Nested Joint Main