Download JNTUH (Jawaharlal nehru technological university) MCA (Master of Computer Applications) 3rd Sem (Third Semester) Regulation-R15 2022 March-April 823AD Marchapril Java Programming Previous Question Paper
R15
Code No: 823AD
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
MCA III Semester Examinations, March/April - 2022
JAVA PROGRAMMING
Time: 3 Hours
Max.Marks:75
Answer any five questions
All questions carry equal marks
- - -
1.a)
What is a Constructor? How to invoke a constructor in JAVA? Explain.
b)
Briefly describe about parameter passing techniques in Java.
[8+7]
2.a)
Discuss various primitive data types in Java.
b)
Write a java program to find maximum of three numbers using ternary operator. [7+8]
3.a)
Explain the use of `super' and `final' key words in java.
b)
Illustrate the importance of Abstract classes with a JAVA program.
[7+8]
4.
Write a detail note on interfaces and packages in java with examples.
[15]
5.a)
Explain the purpose of BufferedWriter classes in Java with an example.
b)
Write a Java program that reads from the `text' file using File Reader.
[7+8]
6.a)
Briefly explain about the following
i) Hash Table ii) String Tokenizer
b)
Write a Java program to accepts a file name as command line argument and finds the
length of the longest line in the file and displays an error message if the file does not exist.
[7+8]
7.a)
Demonstrate nested try statements and finally statements.
b)
Explain thread synchronization with respect to multithreading.
[7+8]
8.a)
Describe the event handling mechanism in java with an example.
b)
Write an applet program that will take an input from the user to calculate the average of
two integers.
[7+8]
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This post was last modified on 17 March 2023