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IGNOU UNIVERSITY MCA - I (SEM 2) JUN 2010 : Object Oriented Technologies annd Java Programming

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No. of Printed Pages : 4 MCS-024 MCA (Revised) Term-End Examination (NI June, 2010 0 MCS-024 : OBJECT ORIENTED TECHNOLOGIES AND JAVA PROGRAMMING Maximum Marks : 100 Time : 3 hours Note : Q. No. 1 is compulsory. Attempt any three questions from the rest. 1. (a) Consider a class that stores a Bank account holder's account number, ATM card number, account balance and ATM PIN. Write a program to store the data onto a disk file, except for the account balance and ATM PIN. Use serialization and transient variables. What makes compiled JAVA programs platform independent ? Explain. Explain the significance of PATH and CLASS PATH. Is this a complete and legal comment ? / * // */ Justify . Are inner class secure and useful? (f) What are the two fundamental mechanisms for building a new classes of a existing class ? MCS-024 1 6 4 5 2 5 5 P.T.O. The members of which classes can access members of a class in a particular package ? 5 Explain the significance of each argument in the function main (string args 1). Why cannot the "abstract" method modifier be used together with the "native" modifier ? 2. 5 3 (a) Differentiate the following and support with example : 2.5x4=10 Final and static member Inheritance and Aggregation Abstract class and Interface String and String Buffer (b) Write a program to implement the following operations on a string : 3.5x2=7 Convert to uppercase Convert to lowercase (c) What are user - defined exceptions ? 3. 3 (a) What is the difference between checked and unchecked exceptions ? 3 MCS-024 2 Create a class account with the following data members (i) 5 account id name (iii) current balance and implement the member functions : Withdraw deposit How multiple inheritance is achieved in Java ? Explain with an example. Write an applet that prints "Here" at the 3 9 current cursor position whenever the mouse left button is clicked. 4. (a) Write short notes on following : Interthread communication 3 Event Handling in Java 3 What is a layout managers ? Explain layouts with example. Write a Java program to set up JDBC and execute the following SQL statement on a database table employee-t with the fields emp-id, emp name, emp-department, empbasic "SELECT * FROM employee-t where emp-basic < 10000; MCS-024 6 8 3 P.T.O. 5. (a) Write a program to sort the list given as 10 command line arguments using bubble sort. What is Java Bean ? What are its advantages ? What is Introspection in Java Beans ? Illustrate with a code fragment. MCS-024 5 5 4

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Additional Info : Mca - I (sem 2) June 2010 Question Paper - Object Oriented Technologies and Java Programming(Revised Course)
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