DOEACC Society 2006 DOEACC C Level Object Oriented Methodology ( ) - Question Paper

C5-R3: OBJECT ORIENTED METHODOLOGY
NOTE:
Time: three Hours Total Marks: 100
1.
a) What Integer method can you use to convert an integer into a string that expresses the
number in hexadecimal? For example, what method converts the integer 65 into the string
"41"?
b) What 2 Integer methods would you use to convert a string expressed in base five into
the equivalent integer? For example, how would you convert the string "230" into the
integer value 65? Show the code you would use to accomplish this task.
c) What Double method can you use to detect whether a floating-point number has the
special value Not a Number (NaN)?
d) What is the value of the subsequent expression, and why?
new Integer(1).equals(new Long(1))
e) What is the idea of responsibility tied to info hiding in object-oriented design?
f) How does 1 properly identify the class and objects that are relevant to a particular
application?
g) Distinguish ranging from Abstract Class and Interface.
(7x4)
2.
a) What Is a Message? discuss the message passing in a system with the help of a sequence
diagram or an event trace diagram.
b) What is a class inheritance hierarchy? discuss benefits of inheritance.
c) discuss distinction ranging from Aggregate and Inheritance relationship.
d) discuss how Java 3D hides rendering-pipeline details from the developer.
(4+4+5+5)
3.
a) discuss the advantages of OOP (Object Oriented Programming) versus other programming
techniques.
b) explain how the encapsulation provide rise to modularity.
c) How a developer can hide data in java programs, discuss the use of encapsulation
accordingly.
d) Java 3D components are heavyweight. explain.
(5+5+4+4)
4.
a) How polymorphism is linked to inheritance. Is it necessary to have inheritance to go for
polymorphism? If yes how?
b) Compare composition and generalization-specialization.
(9+9)
C5-R3 Page one of two January, 2006
1. ans ques. one and any 4 ques. from two to 7.
2. Parts of the identical ques. should be answered together and in the identical
sequence.
5.
a) How delegation is performed making use of part-of relationship. How do we implement the
delegation in Java programming?
b) Write a program that indicates the basic steps needed to display 3D objects.
· Create a virtual universe to contain your scene.
· Create a data structure to contain a group of objects.
· Add an object to the group
· Position the viewer so that they are looking at the object
· Add the group of objects to the universe
(9+9)
6.
a) Can a program run on any platform if it is written in the JAVA programming language?
b) An applet will run in almost any browser, why?
c) What does the Applet class provide?
d) Which method will a web browser call 1st on a new applet? discuss the method.
e) What is the advantage of using import statements? Explain?
f) What a constructor in Java used for.
g) What the BorderLayout class provides static fields for.
(3+2+3+3+3+2+2)
7.
a) Write a program that prints the web address of DOEACC (www.doeacc.org.in).
b) Write a program that prints the web address 204.219.27.27.
c) Write a program to obtain the IP address of the local machine.
(6+6+6)
C5-R3 Page two of two January, 2006

Earning:   Approval pending.