BCA Object Oriented Programming in Java

What is conditional operator? Write a program to find smallest number among three number using command line argument.

What is command-line arguments? Write a program to accept two numbers and display their sum using command-line arguments.

What is a constructor? Explain its types with examples.

Explain different types of Access controls used in Java.

Explain the use of static keyword in Java with proper example.

Explain nested and inner classes in java with examples. Discuss the scenarios where inner classes are useful.

Write short notes on (Any two):

a. Abstract class

b. Applet life cycle

c. JDBC

What is an interface? What is the use of it? Explain the use of interface to implement multiple inheritance in Java with proper example.

a. What is inheritance? Explain its types.

b. Define character stream. Write a program to copy the content of a file to another file using character streams.

What is multiple inhertitance? Explain how multiple inheritance is implemented in Java?

Create a class Person with attributes name and age, and a method display(). Derive a class Employee from Person with additional attributes employeeId and salary. Use constructors and override the display() method to include all details.

Define exception handling. Differentiate between the use of throw and throws with proper example.

Write a program to demonstrate exception handling of ArrayIndexOutOfBoundsException.

What is string immutability? Explain with an example.

What is a multithreaded program? How multithreaded programs can be created in java? Explain with example.

Write a program to create multiple threads and execute them concurrently.

Explain the Serializable interface in java with an example.

a. Create a GUI form in Java that three numbers input from the user and displays the smallest number in a label when Check button is pressed.

b. Differentiate between AWT and swing. Explain any six swing controls with their uses.

Build a form with Passenger Name, Flight Number, Seat Preference (Window, Aisle, Middle), and a checkbox for "I agree to baggage rules." Clicking Confirm Booking should save data to "flight.txt" if rules are accepted otherwise display "Accept baggage rules first."

What is JDBC? Explain its architecture.