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Posted By: Sree.... Member Level: Diamond Posted Date: 13 Jun 2008
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2006 Andhra Pradesh State Jawaharlal Nehru Technological University B.Tech OBJECT ORIENTED PROGRAMMING THROUGH JAVA Set No. 1 Question paper
Code No: RR411006 Set No. 1
IV B.Tech I Semester Supplementary Examinations, March 2006
OBJECT ORIENTED PROGRAMMING THROUGH JAVA
( Common to Electronics & Instrumentation Engineering, Electronics &
Control Engineering and Electronics & Telematics)
Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
? ? ? ? ?
1. (a) Explain the usage of switch statement in Java by writing suitable example
program in Java. [8]
(b) In which aspect, public data members differ from private and protected data
members in Java program? Explain the concept with a suitable example. [8]
2. (a) What is a class ? How does it accomplish data hiding ? [6]
(b) Explain the difference between an object and a class. [6]
(c) What is a constructor ? what are its special properties ? [4]
3. (a) Distinguish between arrays and strings. [5]
(b) Explain the use of commandline arguments with an example. [5]
(c) List out the features of packages. [6]
4. Develop an applet that receives three numerical values as a input from the user and
then displays the largest of the three on the screen. Write a HTML page and test
the applet. [16]
5. (a) Explain the class hierarchy of various window types. [8]
(b) Write down any event generators. [8]
6. Explain applet basics? State how it runs in a window. [16]
7. (a) Describe briefly about “thread priorities”. Demonstrate with a suitable ex-
ample situation. [8]
(b) Identify the different states of a thread. [8]
8. (a) What are the reasons for getting garbage results while using DataInputStreams
readInt or readFloat methods to read in a number from an input string? [8]
(b) Justify your answer in the following cases. What happens [8]
i. if you try to open a file for writing that doesn’t exist?
ii. if an exception does not have a matching catch clause?
iii. if you try to write to a file reader?
? ? ? ? ?
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