BPUT fourth Semester Java question 2008

Fourth Semester Examination – 2008
PROGRAMMING WITH JAVA
Full Marks – 70
Time : 3 Hours
Answer Question No. 1 which is compulsory and any five from the rest.
The figures in the right-hand margin indicate marks.

1. Answer the following questions : [2×10]

(a) What is abstract method ? How it is created ?

(b) Why does Java use Unicode ?

(c) Does importing a package have an impact in performance of any program ?

(d) What is run-time exception ?

(e) What are wrapper classes ? Explain their uses.

(f) What are swing classes ? Why it is used for ?

(g) Differentiate between Java interface and abstract class.

(h) Explain different ways of creating a thread.

(i) What are listeners ? How these are used in event handling ?

(j) What is a constructor ? When it gets executed ?

2. (a) Write a program in Java to find Fibonacci series using recursion.[5]

(b) Write a program to create a 2-D array to accommodate integer that accepts the values and stores them in an array. Your program should display all the values and the length of the array objects. [5]

3. (a) Write a Java program to use super to access super class members.[5]

(b) Explain multi-level inheritance in Java by appropriate example. [5]

4. (a) Write a program to create a menu for Hospital system.[5]

(b) Write a program for a n × m matrix multiplication.[5]

5. (a) What is overloading ? [2.5]

(b) What is the difference between while statement and do statement ? [2.5]

(c) Overridden method supports polymorphism. Justify throughJava programming. [5]

6. (a) Using Java program show the use of constructor, destructor and new operator. [5]

(b) How objects are passed to methods in Java. Explain with an example. [5]

7. (a) What is the difference between declaring and defining a variable ? [2.5]

(b) What is Synchronization in Java ? Explain with example. [2.5]

(c) Using single string show the println ( ) statement that produce the output. [5]
One
Two
Three
8. Write short notes on : [2.5 × 4]

(a) Abstract class

(b) Different types of JDBC drivers

(c) Different Synchronisation methods

(d) Switch and Break statement in Java.

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