IT 2301 — JAVA PROGRAMMING
PART A — (10 × 2 = 20 Marks)
1. What is the difference between static and non-static variables?
2. What is the purpose of finalization?
3. What is the difference between the String and String Buffer classes?
4. Can an abstract class be final? Why?
5. What is an anonymous inner class?
6. What is the difference between the File and Random Access File classes?
7. What are the advantages of the event-delegation model?
8. What happens if an exception is not caught?
9. What is the use of Reflection API?
10. What are three ways in which a thread can enter the waiting state?
PART B — (5 × 16 = 80 Marks)
11. (a) Explain briefly the following object oriented concepts.
(i) Abstraction and Encapsulation. (4)
(ii) Methods and messages. (4)
(iii) Inheritance. (4)
(iv) Polymorphism. (4)
Or
(b) (i) How objects are constructed? Explain constructor overloading with
an example. (Marks 10)
(ii) Write short notes on access specifiers in java. (Marks 6)
12. (a) What is a Package? What are the benefits of using packages? Write down
the steps in creating a package and using it in a java program with an
example. (Marks 16)
Or
(b) What is Dynamic binding? Show with an example how dynamic binding
works. (Marks 16)
13. (a) What is object cloning? Why it is needed? Explain how objects are cloned.
(Marks 16)
Or
(b) How is a Frame created? Write a java program that creates a product
enquirer form using frames. (Marks 16)
14. (a) With a neat diagram explain the Model view controller design pattern
and list out the advantages and disadvantages of using it in designing an
application. (Marks 16)
Or
(b) What is an Exception? Explain how to throw, catch and handle
Exceptions. (Marks 16)
15. (a) What is Generic programming and why is it needed? List the limitations
and restrictions of generic programming. (Marks 16)
Or
(b) Explain how to create threads. Write a java program that prints numbers
from 1 to 10 line by line after every 5 seconds. (Marks 16)
B.E./B.Tech. DEGREE EXAMINATION, APRIL/MAY 2011
Fifth Semester Information Technology
IT 2301 — JAVA PROGRAMMING
PART A — (10 × 2 = 20 marks)
1. Give the properties of abstract classes and methods and write a suitable
example.
2. Why does Java not support destructors and how does the finalize method
help in garbage collection?
3. Write a declaration to convert the value ‘‘Programmer’’ in the string
variable ‘convert’ to ‘‘programming’’.
4. Distinguish between static and dynamic binding.
5. How does the declaration of a local inner class differ from the declaration
of an anonymous inner class?
6. Write a code to copy the contents of the file input.txt one byte at a time to
output.txt using FileInputstream and FileOutputStream.
7. When do the following events occur?
(a) AdjustmentEvent
(b) ItemEvent
8. Write down the statements used to create a JFrame and a JButton and
then add the JButton to the JFrame.
9. List any two advantages of type parameters.
10. When would you use the CountDownLatch synchronizers and Exchange
Synchronizers?
PART B — (5 × 16 = 80 marks)
11. (a) (i) Write a program to find whether a number is a palindrome or
not. (8)
(ii) Discuss the working and meaning of the ‘‘static’’ modifier with
suitable examples. (8)
Or
(b) Explain in detail as to how inheritance and polymorphism are
supported in Java with necessary examples. (16)
12. (a) (i) Write a Java program to perform matrix multiplication using
arrays. (8)
(ii) Write a java program to search for a number in the given array
using binary search. (8)
Or
(b) Give a detailed explanation of packages in Java(16).
13. (a) What is reflection and how does it help to manipulate java code? (16)
Or
(b) Consider a class person with attributes firstname and lastname.
Write a java program to create and clone instances of the Person
class. (16)
14. (a) Write a program to create a calculator using swings with the four
basic arithmetic operations : +, –, *, /. (16)
Or
(b) Draw the exception hierarchy in java and explain with examples
throwing and catching exceptions and the common exceptions.(16)
15. (a) With suitable examples consider the number of restrictions to
consider when working with java generics. (16)
Or
(b) Write short notes on what threads are and the thread states and
properties. (16)
