Osmania University (OU) 2008 M.C.A Computer Aplications Middle Ware Technologies - Question Paper

MIDDLEWARE TECHNOLOGIES


Time:Three hours Maximum: 100 marks

ans ALL ques..
PART A-(10 x two = 20 marks)
1. Enumerate the difference ranging from general and service specific middleware.
2. Draw the diagram that depicts the building block of client server.
3. State the roles of EJB in eco system.
4. When do you Use EJB?
5. Enumerate the difference ranging from CMP and BMP.
6. List any 4 exceptions raised in EJB.
7. What is the role of IDL and IDL complir in distributed system?
8. CORBA ORB is a self describing system-Justify.
9. Compare the functionalities of CORBA and DCOM.
10. List the roles of .NET base class libraries.


PART B-(5 x 16 = 80 marks)
11. (a) (i) discuss the working mechanism of MOM.Stste the difference
ranging from RPC and MOM. (10)
(ii) Illustrate the 3 tier web server model and discuss the sequence
of operations performed in the server side of the model. (6)

Or

(b) How is RPC implemented in client server environment?Explain in
detail the different problems involved while implementing with diagram. (16)


12. (a) (i) With a neat sketch discuss the EJB architecture specifying both
client side and server side environment. (8)
(ii) Decsribe the sequence of steps for deploying J2EE based EJB
applications. (8)

Or

(b) (i) define the functions of various kinds of client views available in
EJB. (6)
(ii) discuss the main steps employed for server-side and client side
EJB development in detail. (10)
13. (a) (i) Compare and contrast stateful session beans with stateless session
beans. (6)
(ii) discuss the life cycle of entity bean in detail. (10)


Or

(b) Consider an E-commerec applications of “shopping cart”for purchasing
Things over the web.Implement the above application using EJB by
Considering the necessary problems involved. (16)

14. (a) (i) discuss the need and technologies used to implement an
distributed system in detail. (8)
(ii) Difference ranging from dynamic invocation interface and static
invocation interface. (3)
(iii) How programmers access ORB functionality from their
programming languages?How to map the subsequent OMG IDL into
C,C++ languages?
//OMG IDL
Module first
{ Interface foo
{
Void operation(inout long param)
raises(USER_EXCEPTION)
};
};

Or
(b) (i) explain the problems involved in CORBA object model in detail. (8)
(ii) Write a CORBA client application to say “hello” and discuss how
an ORB object is created and accessed to invoke the specified
operation in your coding. (8)
15. (a) How do you implement interfaces in COM?Explain the concept involved
in it with diagram and example. (16)

Or

(b) (i) How does proxy and stub are generated in remote communication?
define in detail how communication takes place with diagrm. (8)

(ii) Draw the architecture of .NET and how does CLR execute the .NET
source code?Explain the steps involved in it. (8)

Earning:   Approval pending.