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Remote Method Invocation MCQ

In RMI program the following two steps are used to, Either extend the UnicastRemoteObject class, the exportObject() method of the UnicastRemoteObject class,

Compile the implementation class and create the stub and skeleton objects using the rmic tool

Create the remote interface

Create and start the remote application

Provide the implementation of the remote interface

Answer

Correct Answer: Provide the implementation of the remote interface

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RMI has which of these protocols implementations?

All

Jinni Extensible Remote Invocation (JERI)

Internet Inter-ORB Protocol (IIOP)

Java Remote Method Protocol (JRMP)

Answer

Correct Answer: Java Remote Method Protocol (JRMP)

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When the skeleton receives the incoming request, it does the following tasks?

It reads the parameter for the remote method

It waits for the result

It writes and transmits (marshals) the result to the caller

It reads the parameter for the remote method And It writes and transmits (marshals) the result to the caller

Answer

Correct Answer: It reads the parameter for the remote method And It writes and transmits (marshals) the result to the caller

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Which is an object, acts as a gateway for the client side, all the outgoing requests are routed through it, and it resides at the client side and represents the remote object?

Skeleton

None

Stub And Skeleton

Stub

Answer

Correct Answer: Stub

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In RMI Distributed object applications need to do?

Locate remote objects

All

Load class definitions for objects that are passed around

Communicate with remote objects

Answer

Correct Answer: Locate remote objects

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In Naming class which method specifies name to a remote object?

Bind(string name)

Rebind(string name)

Answer

Correct Answer: Bind(string name)

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In RMI the objects are passed by Value or Reference?

Objects are passed by Reference

Objects are passed by value and reference

None

Objects are passed by value

Answer

Correct Answer: Objects are passed by value

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In RMI which layer defines and supports the invocation semantics of the RMI connection, this layer maintains the session during the method call?

The Application Layer

The Remote Reference Layer

The Stub & Skeleton Layer

The Transport Layer

Answer

Correct Answer: The Remote Reference Layer

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RMI and EJB, provides services to access an object running in another JVM (known as remote object)?

False

True

Answer

Correct Answer: True

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RMI uses a layered architecture; each of the layers could be enhanced or replaced without affecting the rest of the system?

True

False

Answer

Correct Answer: True

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Java supports RMI, RMI Stands for?

Random Method Invocation

Remote Memory Interface

Remote Method Invocation

Answer

Correct Answer: Remote Method Invocation

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In RMI Architecture which layer Intercepts method calls made by the client/redirects these calls to a remote RMI service?

Application layer

Transport layer

Stub & Skeleton Layer

Remote Reference Layer

Answer

Correct Answer: Stub & Skeleton Layer

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Which method of the Naming class (found in java.rmi) is used to update the RMI registry on the server machine?

Lookup()

Lookup() And rebind ()

None

Rebind ()

Answer

Correct Answer: Rebind ()

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An RMI Server is responsible for:

Creating an instance of the remote object

All

Binding the instance of the remote object to the RMI registry

Exporting the remote object

Answer

Correct Answer: Creating an instance of the remote object

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Which is built on the top of socket programming?

RMI

EJB And RMI

None

EJB

Answer

Correct Answer: RMI

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RMI Architecture consists of how many layers?

Answer

Correct Answer: 4

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Which package is used for Remote Method Invocation (RMI)?

Java.rmi

Java.applet

Java.lang.reflect

Java.lang.rmi

Answer

Correct Answer: Java.rmi

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RMI uses which objects for the communication with the remote object?

Stub

None

Skeleton

Stub And Skeleton

Answer

Correct Answer: Stub And Skeleton

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In a RMI Client Program, what are the exceptions which might have to handled?

NotBoundException

All

RemoteException

MalFormedURLException

Answer

Correct Answer: RemoteException

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RMI uses which protocol on top of TCP/IP (an analogy is HTTP over TCP/IP)?

Internet Inter-ORB Protocol (IIOP)

Jinni Extensible Remote Invocation (JERI)

Java Remote Method Protocol (JRMP)

All

Answer

Correct Answer: Java Remote Method Protocol (JRMP)

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