Rajiv Gandhi Proudyogiki Vishwavidyalaya 2007-4th Sem M.C.A Computer Aplications .(ester) ,.-.,2008 - Question Paper

MCA-405-B(N)
M.C.A.(Fourth Semester) EXAMINATION,Nov.-Dec.,2008
(New Scheme)
JAVA PROGRAMMING AND TECHNOLOGIES
(Elective - I)
[MCA - 405 - B (N)]
Time : 3 Hours
Maximum Marks : 100
Minimum Pass Marks : 40

Note : This ques. paper is divided into 5 Units. Attempt 1 ques. from every Unit.
All ques. carry equal marks.

Unit - I
1.(a) elaborate the components of Java architecture ? discuss in detail.
(b) Compare and contrast method overloading and method overriding.

2.(a) What do you understand by array of objects ? Write a program to illustrate it.
(b) Write differences ranging from the subsequent :
(i) Implicit and explicit import statement
(ii) Public and default class
(iii) Application and applet
(iv) Java and C++

Unit - II
3.(a) What is the difference ranging from an abstract class and an interface ? Can abstract
class and interface be used interchangeably ?
(b) What do you understand by thread synchronization ? elaborate synchronized method and
objects ? Illustrate by giving examples.
4.(a) Write a program in Java. A class TEACHER contains 2 fields name and qualification.
Extend this class to Department,it contains Dept-no and Dept-name. An interface named
as college contains 1 field name of college. Using the above classes and interface
get the improper info and display it.
(b) What is exception ? discuss the steps that are to be followed for exception handling
in Java. provide suitable program to illustrate.

Unit - III
5.(a) Write the class hierarchy of applets. elaborate the interfaces available in applet class?
What is the default layout of an applet.
(b) Write an applet to display an image and move the image from left to right and back to its
original position.
6.(a) In Java how will you set the layout ? discuss about 5 layout classes available in Java.
(b) discuss event delegation model in detail.

Unit - IV
7.(a) Crate a random access file system for the file "emp.cat" for updating the employee
info in the file.
(b) elaborate the differences ranging from the subsequent ?
(i) Byte streams and character streams
(ii) Data output stream and print stream
8.(a) Write in detail about different JDBC drivers.
(b) Write a short note on JDBC exception classes and outcome set.

Unit - V
9.(a) discuss the concept of RMI with suitable example. Write a learner class in which division()
is a method which provide the division from aggregate marks. Write an application which runs
this method remotely using RMI.
(b) discuss the subsequent :
(i) Proxy server
(ii) Collection classes
10. Write short notes on the subsequent :
(i) UDP/IP
(ii) DNS
(iii) Data gram socket
(iv) Collection framework

Earning:   Approval pending.