Series SHC/1 Code No.
90/1
Candidates must write the Code on the
Roll No.
title page of the answer-book.
Please check that this question paper contains 7 printed pages.
Code number given on the right hand side of the question paper should be written on the
title page of the answer-book by the condidate.
Please check that this question paper contains 7 questions.
Please write down the serial number of the question before attempting it.
INFORMATICS PRACTICES
Time allowed : 3 hours ] [ Maximum marks: 70
Instructions : (i) This question paper is divided into 3 sections.
(ii) Section A consists of 30 marks.
(iii) Section B and Section C are of 20 marks each.
(iv) Answer the questions after carefully reading the text.
Section-A
1. Answer the following questions :
(a) Define (i) Freeware (ii) Shareware 2
(b) Write one point of difference between front end and back end with one example
of each. 2
(c) Write one example each of “one to many” and “many to many” relationships
between two entity sets. 2
(d) What is the purpose of Data Mining? 2
(e) During System Development Life Cycle, in which phase is the scope and
true nature of problem determined? Explain in brief with the help of an
example. 2
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2. Answer the following questions :
(a) How many value(s) does a Procedure and a Function return ? 2
(b) Distinguish between Single Document Interface and Multiple Document
Interface. Write one example each of SDI and MDI type application. 2
(c) What is Selection statement ? Name any two selection statements that VB
provides. 2
(d) What are Events ? What are Event Procedures ? How are they related ? 2
(e) What is a Bound Control? Name any two data aware properties of bound controls. 2
3. Answer the following questions :
(a) Which statement must be present in a simple loop (Loop.. Endloop) so that it
does not become an infinite loop ? 1
(b) Suggest parameters mode (IN/OUT/IN OUT) for the following : 1
(i) Parameter can be used as a normal variable.
(ii) Passed value must not get changed.
(c) Write two points of differences between SQL and PL/SQL. 2
(d) How are triggers similar to Constraints ? Write one point. 2
(e) What is the purpose of cursor in PL/SQL ? Name the types of cursors used in
PL/SQL. 2
(f) Why do we use Roll back statement ? Explain in brief with the help of an example. 2
Section-B
4. Read the following case study and answer the questions that follow :
ABC Company has developed the following interface to enter and display data related
to Income tax of employees.
90/1 2
The form details of the above form are given in the following table :
Object Type Object Name Description
Form FrmSalary The main Form Object
Text box TxtEmpCode To enter code of Employee.
TxtName To enter Name of Employee.
Txtlncome To enter Taxable Income of Employee.
TxtlTax To display Income tax
TxtEdTax To display Educational tax
TxtSurcharge To display Surcharge
TxtTotalTax To display Total Tax to be paid by the
employee.
Command Button cmdCalculate To calculate Income tax, Education
Tax, Surcharge and Total Tax
cmdClear To clear all the values in Text boxes
cmdExit To close the application.
Write code to implement the following :
(a) When the form loads text boxes for Income tax, Education Tax, Surcharge and
Total Tax Amount should be disabled. They should be enabled only when
Calculate command button is clicked. 2
(b) Taxable Income entered should be numeric data. 2
(c) When the user clicks the Clear command button, textboxes EmpCode and
EmpName should be set to blank and other textboxes should be set to zero. 2
(d) When Calculate command button is clicked, Income tax, Education Tax,
Surcharge and Total Tax (sum of Income Tax, Education Tax, Surcharge) is
displayed in their respective text boxes based on the following criterion. 4
Taxable Income Income Tax Education Tax Surcharge
UptoRs. 1,00,000 Nil Nil Nil
Rs. 1,00,001 to 1,50,000 10% of the 2% of Taxable Nil
amount exceeding Income
Rs. 1,00,000
Rs. 1,50,001 to 2,50,000 Rs. 5,000+20% of 2% of Taxable Nil
amount exceeding Income
Rs. 1,50,000
Rs. 2,50,001 and above Rs. 25,000+30% of 2% of Taxable l% of
the amount exceeding Income Taxable
Rs. 2,50,000 Income.
90/1 3 [P.T.O.
5. Answer the following questions :
(a) How many times will the following loop execute ? 2
1 = 6
Do While I > = -1
I -1-2
Print I
Loop
(b) Write the output that the following code segment will generate 2
Stringl = “Class XII”
String2 = “XI”
Print Stringl + String2
Print InStr (Stringl, String2)
Print Mid (LCase(Stringl), 6, 3 )
Print Int(4.7) + Len(String 2)
(c) Rewrite the following code using If Elself 2
Select Case Code
Case Is > 45
Messagel = “Ersor”
Case l0 To 20
Message 1 = “Accounts”
Case 21 To 30
Message 1 = “Personnel”
Case 31 To 45
Message 1 = “EDP”
Case Else
Message 1 = “Access Denied”
End Select
90/1 4
(d) Write a function that receives two integers as arguments and returns the
following: 4
0 if both are equal
- 1 if first is greater than the second
1 if second is greater than the first
Section-C
6. Read the questions given below and answer accordingly :
(a) Write PL/SQL cursor declaration to store Employee code(EMPNO), Employee
name(ENAME) of employees from Emp table who are located (LOC) in Delhi. 2
(b) Write the output produced by the following code in PL/SQL 2
declare
cnt number;
num number;
begin
cnt: - 8;
num : = 4;
while cnt>4 loop
num : = num-2;
cnt: = cnt-1;
ifcnt>4then
dbms_output.put_line(cnt);
end if;
end loop;
dbms_output.put_line(num);
end;
(c) Find error(s) in the following PL/SQL code and rewrite the correct code after
underlining the corrections made. 2
DECLARE
CTR NUMBER;
SUM1 NUMBER;
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BEGIN
CTR : = 0;
SUM1 : = 0;
LOOP
SUM1 : = SUM1 + CTR;
PRINT(TO_CHAR(SUM1));
CTR : = CTR-2;
IF CTR > 2 THEN
EXIT;
END LOOP;
(d) Create a procedure called Selectemployee that selects the first name, last name,
join date, and salary for employee with employee code 100 from EMP table into
variables and displays values stored in these variables.
Table Emp consists of fields with field names : ID,
FIRST_NAME, LAST_NAME, JOIN_DATE, SALARY 4
7. Answer questions based on the table Student given below :
Table : Student
Column Name Data Type Size Description Constraint
RollNumber NUMBER 2 Student’s Roll Primary key
number
Name VARCHAR2 25 Name of Student NOT NULL
Class VARCHAR2 3 Class of Student
Stream VARCHAR2 15 Stream opted by
the Student
TotalMarks NUMBER 8,2 Total marks scored
by the student
Grade VARCHAR2 1 Grade scored by Can be’A’
the student or ‘B’ or ‘C
90/1 6
(a) Write SQL command to display Roll numbers, names, Total marks and grades
of all the students in “Nonmedical” stream sorted by Total marks in descending
order. 2
(b) Write SQL command to create a view consisting of all students in “Medical”
stream and who have scored “A” grade. 2
(c) Write PL/SQL Procedure that takes in Student’s Roll number as a parameter and
increases Total marks of that student by 2% (as he/she is a Sports person.) 3
(d) Create a Trigger to display the name and stream of Student(s) whose record(s)
is/are being deleted from the Student table. 3
90/1 7 [P.T.O.
