CBSE Class 12 Informatics Practices Revision Assignment Set 01

1. Differentiate between:

a. JTextField and JPasswordField

b. JButton and JFrame

c. JCheckBox and JRadioButton

d. JComboBox and JListBox

e. JTextField and JTextArea

f. JLabel and JTextField

2. Explain the use of following functions of Java:

a. Integer.parseInt()     b. Integer.toString()     c. Math.round()

d. Math.pow()             e. length()           f. Byte.parseByte()

g. substring()         h. concat()        i. toLowerCase()

j. JOptionPane.showMessageDialog()      k. next()    l. DriverManager.getConnection()

3. Write any two common properties and two common methods among following:

a. JTextField and JTextArea b. JCheckBox and JRadioButton c. JComboBox and JListBox

4. Write Java function named tenfolds() that takes a number as parameter and returns its tenth part.

5. Write statements to import packages for following:

a. for database connectivity through JDBC. b. to use JOptionPane dialog box.

6. Consider the following GUI:

If bill amount is greater than 10000 then discount is calculated as follows:

i. Write code to make txtNameofCustomer and txtBillAmount uneditable.

ii. Write code for stop button to close the application.

iii. Write code for Calculate Discount button to calculate discount and net amount

Q1) What is inheritance? Explain different type of inheritance?

Q2) Define class? Create a class abc having function add( ) and another class xyz having function sub( ) call the function add( ) and sub( ) without creating object of class abc?

Q3) Explain overiding at method with an example?

Q4) What is Function overloading? Explan with example?

Q5) What is abstract method? Give an example?

Q6) Explain interface with example?

Q7) Explain different type of Dialog Boxes?

Q8) Differentiate between Pass By Value and Pass By Reterence?

Q9) Create a method to reverse a given number?

Q10) Write a program find whether given no is prime or not?