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Posted By: yamini Member Level: Gold Posted Date: 10 May 2008
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2007 Jawaharlal Nehru Technological University B.Tech Computer Science & Engineering II II CSE Oops through Java Aug/sep 2007 set IV Question paper
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Code No: R05220402 Set No. 4
II B.Tech II Semester Supplimentary Examinations, Aug/Sep 2007
OOP THROUGH JAVA
( Common to Electronics & Communication Engineering, Computer Science
& Engineering, Information Technology, Computer Science & Systems
Engineering, Electronics & Telematics and Electronics & Computer
Engineering)
Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
? ? ? ? ?
1. (a) java is freeform language. Comment
(b) Describe in detail the steps involved in implementing a stand-alone program.
(c) What are command line arguments? How are they useful? [4+6+6]
2. (a) What is the di erence between equality of objects and equality of objects and
equality of references that refer to them?
(b) What is the di erence between a public member and a private member of a
class?
(c) write an application that computes the value of ex by using the formula:
ex = 1 + x/1! + x2/2! + x3/3! + .......... [4+4+8]
3. Create an inheritance hierarchy of Rodent: Mouse, Gerbil, Hamster, etc. In the
base class, provide methods that are common to all Rodents, and override these in
the derived classes to perform di erent behaviors depending on the specific type of
Rodent. Create an array of Rodent, fill it with di erent specific types of Rodents,
and call your base-class methods. Explain the output. [16]
4. Create three interfaces, each with two methods. Inherit a new interface from the
three, adding a new method. Create a class by implementing the new interface and
also inheriting from a concrete class. Now write four methods, each of which takes
one of the four interfaces as an argument. In main( ), create an object of your class
and pass it to each of the methods. [16]
5. (a) What is the meaning of rethrowing an exception? When it is useful.
(b) What are the limitations of exception handling feature of java. [8+8]
6. (a) What is Delegation Event model? Explain it. What are its benefits?
(b) Define Event. Give examples of events. Define event handler. How it handles
events. [8+8]
7. Create an applet with two toolbars. One toolbar should be created using JButtons
and a separator and another toolbar should be created using 3 custom Action
classes. Add one to the ”north” and another to the ”south” sides of border layout.
When the user clicks one of the buttons in the toolbar, it will print a message to the console stating that which button is being pressed from which toolbar. Add
functionalities to the buttons such as New, Open, Close, Save, Cut, Copy, Paste.
[16]
8. What do you mean by URL? How to create an URL? Explain several methods
provided by URL? Give appropriate examples. [4+4+8]
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