CIW ENTERPRISE SPECIALIST

1.An entity beans class contains the following method signature: public Integer ejbCreate (int partNum, String partDescription, float partCost, String partSupplier) throws CreateException Which statement is true of the beans ejbCreate() method?
A.An ejbPostCreate() method with the same number and types of parameters must be present in the beans remote interface.
B.An ejbPostCreate() method with the same method signature must be present in the beans home interface.
C.An ejbPostCreate() method with the same number and types of parameters must be present in the beans class.
D.An ejbPostCreate() method with the same method signature must be present in the beans class.
Correct:C
2.Which choice defines the term isolation when used to describe the properties of a transaction?
A.Isolation guarantees that a transaction will either result in a new valid system, or the system will be restored to its original state.
B.Isolation guarantees that a committed transaction will persist despite any type of system failure.
C.Isolation guarantees that logically related operations are dealt with as a single unit.
D.Isolation guarantees that transactions running at the same time will not have access to each others partial results.
Correct:D
3.An EJB client invokes a create() method. An EJB container instantiates an enterprise bean as the result of this method call. The bean is then held in a pool awaiting a method invocation. To which type of enterprise bean does this process refer?
A.BMP entity bean
B.CMP entity bean
C.Stateless session bean
D.Stateful session bean
Correct:C
4.A finder method in an entity bean is written to find more than one primary key. Which statement correctly describes the invocation of this type of ejbFind…() method?
A.When a client calls a multiple row finder method, the home object allocates a bean instance and invokes the corresponding ejbFind…() method. The home object instantiates a remote object for each primary key, with a collection of remote references returned to the client.
B.When a client calls a multiple row finder method, the home object allocates a bean instance and invokes the corresponding ejbFind…() method. The home object instantiates a collection of remote objects for each primary key, with individual remote references returned to the client.
C.When a client calls a multiple row finder method, the remote object invokes the corresponding ejbFind…() method. The remote object then returns a collection of remote references to the client.
D.When a client calls a multiple row finder method, the home object allocates a bean instance and invokes the corresponding ejbFind…() method. The home object instantiates a collection of primary key references and returns them to the client.
Correct:A
5.The ejbRemove() method for an enterprise bean contains the following line of code: prepStmt = dbConn.prepareStatement ("DELETE FROM MyTable WHERE MyKey = ?"); What type of enterprise bean might this be?
A.Stateful session bean
B.BMP entity bean
C.CMP entity bean
D.Stateless session bean
Correct:A B D
6.Which statement correctly describes CMP entity beans and finder methods?
A.The beans class should contain empty ejbFind() methods with corresponding find() methods defined in the remote interface.
B.The beans class should not contain ejbFind() methods; empty find() methods are defined in the home interface.
C.The beans class should not contain ejbFind() methods; empty find() methods are defined in the remote interface.
D.The beans class should contain empty ejbFind() methods with corresponding find() methods defined in the home interface.
Correct:B
7.Which client application could benefit from the use of a callback object?
A.A Java Micro Edition application that notifies the user of a hand-held computer when traffic conditions have improved along a given freeway
B.A Java applet that allows users to send an e-mail message to the quality control department
C.A Java application used by police officers in the field to retrieve vehicle registration information from a remote database by supplying a complete or partial license plate number
D.A Java applet that retrieves a map image when given a street address
Correct:A
8.Which statement correctly describes the EJBContext interface?
A.The EJBContext interface defines methods that allow clients to find, create and remove enterprise beans.
B.The EJBContext interface defines methods that allow clients to ascertain information about run-time status for enterprise beans.
C.The EJBContext interface defines methods that allow clients to obtain metadata for enterprise beans.
D.The EJBContext interface defines methods that allow clients to obtain network references to enterprise beans.
Correct:B
9.Which type of factory object returns references to objects that reside within the same process as the factory object?
A.Out-process
B.Generic
C.Specific
D.In-process
Correct:D
10.Which statement correctly describes the EJBHome interface?
A.The EJBHome interface is extended by all home interfaces, which provide methods to create, find and remove enterprise beans.
B.The EJBHome interface is extended by all home interfaces, which provide a clients view of an enterprise bean.
C.The EJBHome interface is extended by all home interfaces and is the common superinterface for the SessionBean and EntityBean interfaces.
D.The EJBHome interface is extended by all home interfaces, which the container uses to inform enterprise beans about life cycle events.
Correct:A
11.Consider the following IDL definition:

A.The IDL definition properly defines a factory object that may be used to obtain a reference to a Stock object.
B.The IDL definition cannot be compiled due to an error at line 13.
C.The IDL definition cannot be compiled due to an error at line 5.
D.The IDL definition cannot be compiled due to an error at line 11.
Correct:A
12.You are using container-managed transactions for your entity bean. Which choice lists the methods that must have transaction attributes defined?
A.Remote interface: all business methods and the remove() method. Home interface: all finder methods.
B.Remote interface: all business methods. Home interface: the two remove() methods and all finder methods.
C.Remote interface: all business methods and the remove() method. Home interface: all finder methods, the create() method, and the two remove() methods.
D.Remote interface: the remove() method. Home Interface: the create() method and the remove() method.
Correct:C
13.You need to perform the look-up the home object for an enterprise bean named MyBean and then create a reference to that object. The appropriate arguments for the InitialContext constructor are held in a Hashtable named srvrProps. Which code demonstrates this look-up?

A.B
Correct:A
14.What is the purpose of the InitialContext constructor?
A.To acquire a default JNDI context
B.To construct a database connection
C.To access a beans remote interface
D.To obtain a starting point into a servers namespace
Correct:A D
15.When and by what is the ejbLoad() method invoked?
A.The ejbLoad() method is invoked by the container just after the ejbActivate() method.
B.The ejbLoad() method is invoked by the client just prior to the ejbActivate() method.
C.The ejbLoad() method is invoked by the client just after the ejbActivate() method.
D.The ejbLoad() method is invoked by the container just prior to the ejbActivate() method.
Correct:A
16.Which parameter-passing modes result in the marshalling of data from the server on its way to the client?
A.in
B.outin
C.out
D.inout
Correct:C D
17.Consider the following IDL definition:

A.The remote method will not be able to extract information from parameter ri because it is defined as an out parameter.
B.The IDL definition allows an instance of Radar Info to be passed to the server-side implementation.
C.The remote method will not be able to extract information from parameter ri because it is a struct type.
D.Instances of Radar Info may be published to the naming service and accessed remotely.
Correct:A
18.The IDL type unsigned long long maps to which Java primitive data type?
A.double
B.short
C.long
D.int
Correct:C
19.The IDL type unsigned short maps to which Java primitive data type?
A.byte
B.long
C.int
D.short
Correct:D
20.A business method is being invoked on an entity bean. The entity bean has been instantiated, but has been placed in the entity bean pool by the container due to inactivity. Based on this scenario, consider the following steps: 1.The home object calls the ejbLoad() method. 2.The EJB object sends the business method invocation to the entity bean. 3.The EJB object notifies the container that an entity bean instance is required. 4.The entity bean uses the primary key obtained from the EJB object to populate its fields. In which order will these steps occur?
A.3, 1, 2, 4
B.3, 1, 4, 2
C.2, 3, 4, 1
D.2, 3, 1, 4
Correct:B
21.Consider the following Java code fragment:

A.The code fragment attempts to extract an object reference named A maintained within a naming context named B.
B.The code fragment attempts to extract an object reference named B maintained within a naming context named A.
C.The code fragment attempts to extract an object reference A of data type B.
D.The code fragment attempts to extract an object reference B of data type A.
Correct:A
22.Which statement correctly describes inout parameters?
A.inout parameters are passed only from the server-side implementation to the calling method.
B.inout parameters are passed only from the calling method to the server-side implementation.
C.inout parameters cannot be used to pass IDL struct types.
D.inout parameters are passed from the calling method to the server-side implementation and from the server-side implementation to the calling method.
Correct:D
23.Which statement correctly describes the mechanism by which enterprise beans are instantiated?
A.Enterprise beans are instantiated by calling a create() method on the beans remote interface using a reference to the beans home interface. Each create() method has a corresponding ejbCreate() method in the beans home interface.
B.Enterprise beans are instantiated by calling a create() method on the beans remote interface using a reference to the beans home interface. Each create() method has a corresponding ejbCreate() method in the beans remote interface.
C.Enterprise beans are instantiated by calling a create() method on the beans home interface using a reference to the beans remote interface. Each create() method has a corresponding ejbCreate() method in the beans remote interface.
D.Enterprise beans are instantiated by calling a create() method on the beans home interface using a reference to the beans home interface. Each create() method has a corresponding ejbCreate() method in the beans home interface.
Correct:D
24.What is the functionality of the reference returned by the setSessionContext() method?
A.A session context reference is used to query the EJB container about an enterprise beans current transactional state.
B.A session context reference is used to query the EJB container about an enterprise beans home interface and resource factories.
C.A session context reference is used to query the EJB container about an enterprise beans security settings.
D.A session context reference is used to finalize initialization of an enterprise bean.
Correct:A C
25.Which parameter-passing modes result in the marshalling of data from the client on its way to the server?
A.out
B.inout
C.in
D.outin
Correct:B C
26.If an ejbFindByPrimaryKey() method cannot locate a particular record, which exception should be thrown to the client?
A.RemoteException
B.EJBException
C.ObjectNotFoundException
D.FinderException
Correct:C
27.Consider the following partial XML descriptor for the CustomerBean:

A.If the current thread has a transaction, the getCustomerBalance method will run in that transaction. If there is no current transaction, the EJB container will not provide one.
B.The EJB container will provide a new transaction if the current thread does not already have one. If the current thread has a transaction, the getCustomerBalance method will run within that transaction.
C.The getCustomerBalance method will never run within a transaction.
D.If the current thread is not involved in a transaction, the EJB container will not provide one. If the current thread is involved in a transaction, the transaction is suspended, the method is executed, and the thread's transaction is resumed.
Correct:D
28.Consider the following statement: prepStmt = dbConn.prepareStatement ("INSERT INTO MyTable (ID, FSTNAME, LSTNAME VALUES (?,?,?)"); The prepStmt member is of type PreparedStatement. The dbConn member is of type Connection and represents a connection to a database. The ID column is an int data type. The FSTNAME and LSTNAME columns are VARCHAR data types. The value for the ? Placeholders in the SQL statement are held by member variables named id, fstName and lstName respectively. Which of the following statements would properly execute the statement given in this question?
A.prepStmt.setInteger (1, id); prepStmt.setString (2, fstName); prepStmt.setString (3, lstName); dbConn.executeUpdate (prepStmt);
B.prepStmt.setInteger (0, id); prepStmt.setString (1, fstName); prepStmt.setString (2, lstName); prepStmt.executeUpdate ();
C.prepStmt.setInt (0, id); prepStmt.setString (1, fstName); prepStmt.setString (2, lstName); dbConn.executeUpdate (prepStmt);
D.prepStmt.setInt (1, id); prepStmt.setString (2, fstName); prepStmt.setString (3, lstName); prepStmt.executeUpdate ();
Correct:D
29.Which choice defines the term durability when used to describe the properties of a transaction?
A.Durability guarantees that transactions running at the same time will not have access to each others partial results.
B.Durability guarantees that a committed transaction will persist despite any type of system failure.
C.Durability guarantees that logically related operations are dealt with as a single unit.
D.Durability guarantees that a transaction will either result in a new valid system, or the system will be restored to its original state.
Correct:B
30.Consider the following IDL definition: module accounts { interface Checking { attribute float balance; void withdraw (in float amount); }; }; How is the withdraw operation mapped to Java in the client stub?
A.The withdraw operation maps to a single member variable.
B.The withdraw operation maps to a single member method.
C.The withdraw operation maps to two member methods.
D.The IDL definition cannot be compiled due to an error in the definition of the withdraw operation.
Correct:B