2904901
Question 1
Question
Which is FALSE about Enterprise Java Beans?
Answer
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Binds to a variety of services including RMI, JDBC, JNDI, JMS
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Supports stateless objects
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Supports stateful session
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Uses JSON (Java serializable object networking) to represent the data
Question 2
Question
Which of the following is false about CORBA
Answer
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Supports both persistent and transient communication
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Uses an IDL based on C data types
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Uses network pointer for addressing objects which encapsulates an object’s identity and location information
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Is object based
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None of the other options are false
Question 3
Question
Which of the following is a function of the Server Manager in the context of an Implementation Repository?
Answer
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Starts servers if necessary
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Converts messages to formats compatible with the server
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Adding a transparency layer between a server and the implementation repository
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Filtering messages which are incompatible with a server
Question 4
Question
Which of these is not a function of an Object Request Broker (ORB)?
Answer
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Location of servants
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Separating interface and implementation
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Activation/deactivation of the servant’s container (the server process) where necessary
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Scheduling the servant’s container (the server process) to be restarted when a message lease expires
Question 5
Question
Which of the following is false?
Answer
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Static invocation requires that interfaces are known when the application is developed
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Interfaces are usually specified in an interface definition language (IDL)
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Dynamic invocation allows to compose RMI at run time
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Dynamic invocation is only possible over IP based protocols
Question 6
Question
Which of the following is true about a Dynamic Invocation Interface (DII)?
Answer
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allows clients to invoke objects without a precompiled stub
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only compatible with dynamic/interpreted languages such as Python
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Faster because pre-compiled stubs do not need to be loaded from memory
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requires that the client knows the parameter list and function name in advance
Question 7
Question
Which of the following is false about web services?
Answer
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Most useful for cross platform and application interoperability eg. business to business integration
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XML encoding has a high parsing overhead
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SOAP may be used in place of GET / POST
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HTTP is stateful
Question 8
Question
Which of the following is true about a remote object with client-side proxy?
Answer
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The state of the object is not distributed
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The state of the object is distributed
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The state of the object is replicated on both the client and the server
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The application must decode results returned by the function from the encoding they were transmitted in
Question 9
Question
What is the function of WSDL?
Answer
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Interface definition, similar to IDL
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Discovering/locating services dynamically
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Avoiding the drawbacks of XML by enabling the use of binary encoding
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Enabling interoperability with .NET and other languages such as Java
Question 10
Question
Which is true about Transient objects?
Answer
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exists as long as the server hosting the object
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exists even if it is currently not contained in the address space of any server
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a record stored in a database would be a transient object
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most distributed computing platforms only support persistent objects
Question 11
Question
What is false about system wide object references?
Answer
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Is a difference between Remote Method Invocation and RPC
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Object references can be passed between remote processes
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Process holding an object reference has to bind to the object before invoking any method
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Binding results in a reverse pointer being placed in process’s address space
Question 12
Question
Which of the following is FALSE about .NET remoting
Answer
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Supports UDP or TCP/IP
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Supports SOAP and binary encoding
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Similar to CORBA RMI
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RMI call includes the object URI in the request
Question 13
Question
Which of these is not a .NET distributed computing platform
Answer
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.NET Remoting
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.NET Web Services
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WCF (Windows Communication Foundation)
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WCI (Windows Communication Interface)
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