1
Seat No.: Enrolment
GUJARAT TECHNOLOGICAL UNIVERSITY
MCA SEMESTER-III EXAMINATION WINTER 2018
Subject Code: 2630002 Date: 11-01-2019
Subject Name: Fundamentals of Java Programming
Time: 10.30 am to 1.00 pm Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
Q.1

State whether the following statements are true or false. Justify your answers.
An interface can be derived from an interface.
Abstract class has constructors.
One Java (.java) file can have multiple classes.
One class cannot be derived from more than one interface in java.
A class declared as "final" can be inherited into another class.
Java source code can be written in files with any extension.
Static variable cannot be used in non-static methods.
07

Explain the difference between derived and super class with example.
Discuss initializer block and class initializer block with suitable java code.
03
04
Q.2

How can an array of primary data type and user-defined data type (class) be declared and used in java . Explain primary data type and user defined data type array with java code.
07

Design a class "employee" which has instance variables emp_id, emp_name, emp_sal,
default parameterized constructor;
"mca_employee" is derived from "employee" class. It has extra variable DA, default and parameterized constructor.
Create two objects of type "mca_employee". One is created by calling default constructor and another one by parameterized constructor.
Explain the process of calling of derived and super class constructor at the time of creation of these two objects with the help of this above application.
07
OR

Define primitive type and wrapper classes in Java. Explain boxing, unboxing and autoboxing using java program code.
07
Q.3

Differentiate in between class, abstract class and interface with JAVA program.
07

Discuss inner class, local inner class and anonymous inner class with java code?
07
OR
Q.3

Discuss method overriding and method overloading which are implemented in Java?
07

Define Thread. How many ways thread can be implemented?
07
Q.4

Describe final keyword for class, instance variable and method using inheritance in java program.
07

Discuss any five classes of Collection with java program code.
07
OR
Q.4

What is Frame class? Explain with java code.
Explain BorderLayout, CardLayout and FlowLayout managers of AWT.
04
03

How can exception be handled in java code? State the advantages of exception handling.
07
Q.5

Explain enum type with example.
07
2

Explain the process of creating and using user defined package in java. Give Example.
07
OR
Q.5

Explain InputStream class, OutputStream class, Reader class and Writer class with suitable java code.
07

What is "Comparable" interface, "Object" class and "Comparator" class? Explain with code.
07