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2. (a) Identify the invalid variable names. Sate the reason if invalid. 1
(i) Marks Unit
(ii) Product_1
(iii) Sales123
(iv) 2Marks
(b) Write the data type of variables that should be used to store : 1
(i) Marks of students
(ii) Grades of students (Grade can be ‘A’ or ‘B’ or ‘C’)
(c) Write examples of any two properties and any two methods of
jButton component. 2
(d) Write the purpose of HTML. Distinguish between <P> tag and <BR>
tag. 2
(e) Distinguish between ComboBox and ListBox. When would you
prefer using them over Radiobutton and Checkbox ? 2
(f) Rewrite the following code using switch statement : 2
if (code == ‘A’)
allowance = 3500;
else if (code ==’B’)
allowance= 3200;
else
allowance =2000;
90 3 P.T.O.
