Scribd
Upload
255 views5 pages

Mcs 024

This document contains a term-end examination for an Object Oriented Technologies and Java Programming course. It includes 6 questions assessing various Java concepts: 1) Create a class hierarchy for students with subclasses for graduate and research students. Include constructors, methods to display info, and demonstrate polymorphism. 2) Compare procedural and object-oriented programming, explain inheritance forms and advantages. Demonstrate dynamic initialization, operator precedence, switch statements, and array initialization. 3) Explain static methods with an example, passing objects as parameters, packages and classpath, interfaces versus abstract classes. 4) Demonstrate inter-thread communication using wait() and notify(), compare String and Character classes, convert lowercase to uppercase

Uploaded by

shaniba
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
255 views5 pages

Mcs 024

This document contains a term-end examination for an Object Oriented Technologies and Java Programming course. It includes 6 questions assessing various Java concepts: 1) Create a class hierarchy for students with subclasses for graduate and research students. Include constructors, methods to display info, and demonstrate polymorphism. 2) Compare procedural and object-oriented programming, explain inheritance forms and advantages. Demonstrate dynamic initialization, operator precedence, switch statements, and array initialization. 3) Explain static methods with an example, passing objects as parameters, packages and classpath, interfaces versus abstract classes. 4) Demonstrate inter-thread communication using wait() and notify(), compare String and Character classes, convert lowercase to uppercase

Uploaded by

shaniba
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
You are on page 1/ 5

No.

of Printed Pages : 5 I MCS-024 I

MCA (Revised) / BCA (Revised)


Term-End Examination
December, 2017
0.4-1:360

MCS-024 : OBJECT ORIENTED TECHNOLOGIES AND


JAVA PROGRAMMING

Time : 3 hours Maximum Marks : 100


(Weightage 75%)

Note : Question no. 1 is compulsory and carries


40 marks. Attempt any three questions from the
rest of the questicins.

1. (a) Consider the following class hierarchy :

Student (name, age, programme)

1
Graduate_student Research_student
(% marks in 12th, stream) (specialisation, years of experience)

A university has two types of


students — graduate students and
research students. The University
maintains the record of name, age and
programme of every student. For graduate
MCS-024 1 P.T.O.
students, additional information like
percentage of marks and stream, like
science, commerce, etc. is recorded;
whereas for research students,
additionally, specialisation and years of
working experience, if any, is recorded.
Each class has a constructor. The
constructor of subclasses makes a call to
constructor of the superclass. Assume that
every constructor has the same number of
parameters as the number of instance
variables. In addition, every subclass has a
method that may update the instance
variable values of that subclass. All
the classes have a function
display_student_info( ), the subclasses
must override this method of the base
class. Every student is either a graduate
student or a research. student.
Perform the following tasks for the
description given above using Java :
(i) Create the three classes with proper
instance variables and methods,
with suitable inheritance. 5
(ii) Create at least one parameterised
constructor for each class. 3

(iii) Implement the display_student_info( )


method in each class. 3
MCS-024 2
(iv) Create an appropriate main method
with at least two objects of each
subclass. Can you create an object of
the superclass ? Justify your
answer.
(v) Write the code in main that uses
objects - and overriding to show
polymorphism.

(b) What is multithreading ? What are the


advantages of multithreading ? What is a
main thread in the context of Java ?

(c) Write a Java program that accepts the


input from the keyboard and writes it to a
text file.

(d) Explain how an event is handled in Java


with the help of an example program.

(e) Assume that a database named "Student"


exists with attributes student_ID,
student_name and programme. Write a
Java program segment which will execute
a SELECT query and display the resultant
records. You need' not write the connection
command.

(f) What is Bytecode in Java ? What are the


advantages of using bytecode in Java ?

MCS-024 3 P.T.O.
2. (a) List the salient features of object oriented
programming approach that distinguishes
it from the procedural programming.
(b) Explain different forms of inheritance with
the help of diagrams. What are the
advantages of using inheritance ? 8

(c) Explain the following with the help of an


example of each :
(i) Dynamic Initialization
(ii) Operator Precedence
(iii) Switch Statement
(iv) Array Initialization

3. (a) What is Static Method in Java ? Explain


with the help of an example. 4

(b) Explain with the help of an example


program, how objects can be passed as
parameters in Java. 5
(c) What is a Package in Java ? How are they
related to CLASSPATH ? Explain with the
help of an example program. 6
(d) What is an Interface in Java ? How are
they different from ABSTRACT classes ? 5

4. (a) Explain with the help of an example


program, how interthread communication is
performed in Java using wait( ) and notify( )
and other methods. 6
MCS-024 4
(b) How is Character class in Java different to
Striiig class ? Explain how you will
compaie two objects of String class. Also
write a program that converts lowercase
characters to uppercase characters of a
string. 8

(c) What Is the purpose of the following


Stream classes ? 6
(i) PrintStream
RandomAccessFile
ByteArraylnputStream
(iv) FilterOutputStream

5. Explain the following with the help of a/an


diagram/example/program, if needed : 20
(a) Paint( ) Method of Applet
(b) HTML Applet Tag
(c) Button
(d) Checkbox Group
(e) Grid Layout (No need of writing program)
(0 Container
(g) Uses of RMI
(h) POST Method

MCS-024 5 8,000

You might also like