Download JNTUH (Jawaharlal nehru technological university) MCA (Master of Computer Applications) 3rd Sem (Third Semester) Regulation-R17 2021 July-August 843AE Java Programming Previous Question Paper
Code No: 843AE
R17
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
2021 MCA III Semester Examinations, July/August - 2021
JAVA PROGRAMMING
Time: 3 Hours
Max.Marks:75
Answer any five questions
All questions carry equal marks
- - -
1.a)
How Java provides portability? Explain.
b)
Explain static classes.
[7+8]
2.
Define a class name "Set" that contains three integers a, b, c. Define the below methods.
void addition(int a, int b, int c);
void subtraction(int a, int b, int c);
Write a program to display the addition and subtraction of the sets.
What is the problem with the above methods declaration? What is to rectify the
error?
[15]
3.
Demonstrate the concept of polymorphism in JAVA with an example code.
[15]
4.
Define a class for Home Automation. In the initial phase, implement two simple methods
like void display Lights(), void off Lights()(just print simple messages like Led is
glowing etc..) and also include an abstract method void control Lights(). Inherit the Home
Automation class to Reverse Engg Clinics class and implement the abstract method void
control Lights () in Reverse Engg Clinics class using JAVA code.
[15]
5.
What is an Runnable interface? Create two threads, one thread displays even integers
from 0 to 10, one thread displays odd integers from 1 to 11. Implements the above
scenario using Runnable interface in multi threading.
[15]
6.
Explain exception handling in JAVA with an illustrative example.
[15]
7.
Design the given from with AWT components.
[15]
8.
How to create and give a brief description of each component
a JComboBox and a
List using AWT. Explain how they are different give the sample code.
[15]
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This post was last modified on 17 March 2023