Most Recent Oracle 1Z0-900 Exam Questions & Answers

Prepare for the Oracle Java EE 7 Application Developer exam with our extensive collection of questions and answers. These practice Q&A are updated according to the latest syllabus, providing you with the tools needed to review and test your knowledge.

QA4Exam focus on the latest syllabus and exam objectives, our practice Q&A are designed to help you identify key topics and solidify your understanding. By focusing on the core curriculum, These Questions & Answers helps you cover all the essential topics, ensuring you're well-prepared for every section of the exam. Each question comes with a detailed explanation, offering valuable insights and helping you to learn from your mistakes. Whether you're looking to assess your progress or dive deeper into complex topics, our updated Q&A will provide the support you need to confidently approach the Oracle 1Z0-900 exam and achieve success.

The questions for 1Z0-900 were last updated on Jan 20, 2025.

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Question No. 1

A Persistence application locks entity x with a LockModeType.PESSIMISTIC_READ lock type. Which statement is true?

ALockModeType.PESSIMISTIC_READ is the synonym of LockModeType.READ

BThis operation will force serialization among transactions attempting to read the entity data.

CThis operation will result in a TransactionRolledbackException if the lock cannot be obtained.

DIf the application updates the entity later, and the changes are flushed to the database, the lock will be converted to an exclusive look.

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Correct Answer: B

Question No. 2

Given the code fragments:

What code should you add to the body of the updateEmployee method in order to save pending changes to the database?

AentityManager.merge(emp);

BContext. Ctx = new InitialContext();UserTransaction utx = (UserTransaction)ctx.lookup(''java:comp/UserTransaction'');utx.begin();entityManager.merge(emp);utx.commit();. entityManager.lock(emp);EntityManager.merge(emp);

CentityManager.getTransaction().begin();entityManager.merge(emp);entityManager.getTransaction().commit();

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Correct Answer: B

Question No. 3

A Java EE application that uses an EJB container must communicate with a legacy system developed using non-Java technologies.

Which two Java EE technologies can be used in the integration tier of the application? (Choose two.)

AJMS

BJSF

CJPA

DJCA

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Correct Answer: A, B

Question No. 4

How can you inject a target web service into an EJB?

ADefine service as an injectable resource by using the <resource-ref> declaration.

BUse a HandlerChain.

CUse a java.xml.ws.WebServiceRef annotation.

DUse a java.xml.ws.WebServiceContext annotation.

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Correct Answer: A

Question No. 5

Given:

What code needs to be added to line 1 for MyMapper bean instances to be correctly passivated?

A@Stateless @PassivationCapable

B@Stateless

C@Stateful @PassivationCapable

D@Stateful

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Correct Answer: D

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