Page 69 - IP

Informatics Practices
Class XII

MODEL TEST PAPER -III
MM-70 Time - 3 Hrs.
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Note: (i) Programming Language – Java & MySql
(ii) Write answers of all the sub-questions of each question together.
(i) Select Avg (Commission) for Sales; (ii) Select Count(Sales) from Sales;

Q4. a. What is the difference between inheritance and polymorphism 1

(b)Rewrite the following if-else segment using switch-case statement. 2
char ch = ‘P’;
if((ch == ‘p’) || (ch == ‘P’)) System.out.println("Platinum");
if((ch == ‘g’) || (ch == ‘G’)) System.out.println("Gold");
if(ch == ‘S’) System.out.println("Silver");
else System.out.println("Normal");

(c)What is the purpose of the following statement:
jTextField1.setText(“Informatics Practices”.toUpperCase( )); 1

(d) What will be the contents of sum after executing the following code: 1
int i = 2, j = 5,sum =0;
while (i < j)
{
sum+ =i;
i++;
}

(e) What will be the contents of jTextField1 and jTextField2 after executing the following code: 2
String str =”Mahatma”; jTextField1.setText(str.substring(4)); jTextField2.setText( “”
+str.length( ));

(f) The following code has some error(s).Rewrite the correct code underlining all corrections made. 2
int i = 2, j = 5;
while j >i
{
jTextField1.getText(“j is greater”); j --; ++I;}
joptionpan.showMessageDialog(“Hello”);