Rar05320401-oops-through-java-set1

RA

Code No: RAR05320401

III B.Tech II Semester Regular Examinations, Apr/May 2008 OOPS THROUGH JAVA (Electronics & Communication Engineering) Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ????? 1. (a) Can you convert a for loop to a while loop? List the advantages of using for loops (b) Convert the following for loop statement to a while loop and to a do loop: for (int i=0;i<=1000;i++) long sum=sum+i; . [8+8] 2. (a) What is an array? Why arrays are easier to use compared to a bunch of related variables? (b) Write a program for transposition of a matrix using arraycopy command. [6+10] 3. Create a base class with two methods. In the first method, call the second method.Inherit a class and override the second method. Create an object of the derived class, upcast it to the base type, and call the first method. Explain what happens. [16] 4. Prove that all the methods in an interface are automatically public.

[16]

5. Explain in detail different Array related exceptions with the help of examples.[16] 6. What are the methods supported by KeyListener interface and MouseListener interface. Explain each of them with examples. [8+8] 7. What is meant by AWT? How will you create User Interfaces for applets? [6+10] 8. (a) What are accessor methods? (b) How will you create strings and stringbuffers? How will you modify them? [8+8] ?????

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