Oracle Oracle Certifications 1Z0-900 Questions & Answers

• Question 101:

  Given the code fragment:

  

  How long does this cookie persist?

  A. until server shutdown

  B. until garbage collection in the servlet instance

  C. this request

  D. until browser shutdown

  Correct Answer: D

  Reference: https://docs.oracle.com/javaee/6/api/javax/servlet/http/Cookie.html

• Question 102:

  When should a JPA entity implement the Serializable interface?

  A. when JPA entities are used in the EJB Full container

  B. when JPA entities are used outside of the EJB Lite container

  C. always, because JPA entities are required to implement the Serializable interface

  D. when JPA entities are used as parameters or return values by the remote EJB operations

  Correct Answer: D

  Reference: https://stackoverflow.com/questions/2020904/when-and-why-jpa-entities-should-implementserializable-interface

• Question 103:

  Which statement is true about JAX-RS resource implementation?

  A. The REST resource implementation class must extend the javax.ws.rs.core.Application class

  B. The REST resource class can be implemented as a stateful Enterprise JavaBean (EJB).

  C. The REST resource class can be implemented as a Plain Old Java Object (POJO).

  D. The REST resource implementation class must not be final.

  Correct Answer: A

  Reference: https://docs.oracle.com/javaee/7/tutorial/jaxrs002.htm

• Question 104:

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

  A. Define service as an injectable resource by using the declaration.

  B. Use a HandlerChain.

  C. Use a java.xml.ws.WebServiceRef annotation.

  D. Use a java.xml.ws.WebServiceContext annotation.

  Correct Answer: A

• Question 105:

  How can you configure, in a portable way, the number of threads used by a ManagedExecutorService?

  A. programmatically, using a ManagedExecutorService

  B. using the ManagedExecutors utility class to define the execution properties

  C. This cannot be done because this configuration is dependent on the Java EE Product Provider.

  D. configuring the thread pool info in the deployment descriptor

  Correct Answer: A

• Question 106:

  Given an HttpServletRequest request and an EJB SessionContext ctx.

  Which is a valid way to retrieve the Principal invoking either behavior?

  A. request.getCallerPrincipal() and ctx.getCallerPrincipal()

  B. request.getUserPrincipal() and ctx.getUserPrincipal()

  C. request.getCallerPrincipal() and ctx.getUserPrincipal()

  D. request.getUserPrincipal() and ctx.getCallerPrincipal()

  Correct Answer: A

• Question 107:

  Given the code fragment: How can you get all property names of a JMS message in the JMS consumer onMessage operation?

  

  A. String [] props = msg.getPropertyNames();

  B. Enumeration props = msg.getPropertyNames();

  C. Iterator props = msg.getPropertyNames();

  D. List props = msg.getProperties();

  Correct Answer: A

• Question 108:

  Which annotation allows a request to be executed with another Principal's identity?

  A. It is not possible to execute a request with another Principal's identity.

  B. @UseIdentity

  C. @RolesAllowed

  D. @Runs

  Correct Answer: C

  Reference: https://docs.oracle.com/cd/E19798-01/821-1841/6nmq2cpig/index.html

• Question 109:

  Which statement is true about the WS-Security standard?

  A. It is a Java EE standard for protecting SOAP services.

  B. It relies on HTTP security mechanism to protect SOAP messages in transmit.

  C. It provides message-level security.

  D. It defines protocol-specific ways of protecting SOAP messages.

  Correct Answer: C

  Reference: https://docs.oracle.com/cd/E19226-01/820-7627/gjiou/index.html

• Question 110:

  Which two statements are true about the relationship between JavaServer Pages (JSP) and servlets? (Choose two.)

  A. A JSP page must extend the HTTPServlet class to behave like a servlet.

  B. A JSP page has access to the same information, objects, and a context as a servlet.

  C. A JSP page is interpreted by JSPServlet.

  D. A JSP page must be written as either an XML file or a JSP file before it is turned into a servlet.

  Correct Answer: AD