CBSE Guess > Papers > Important Questions > Class XII > 2009 > Informatics Practices > Informatics Practices By Mr. venu gopal
CBSE CLASS XII
SECTION - A
Answer the following questions :
Q . 1. write a PL/SQL block to print a Pyramid as given
1
1 2
1 2 3
1 2 3 4
1 2 3 4 5
Q . 2. Distinguish between numeric for loop and cursor for loop with example .
Q . 3. Distinguish between before and after triggers with example .
Q . 4. explain in brief the types of cursors supported by pl/sql .
Q . 5. differentiate between grant and revoke commands explaining the purpose of each .
Q . 6. explain the usage of bind variables in pl/sql with the help of example .
Q . 7. In a pl/sql code, DBMS_output.put_line is used to display output but the output is not getting displayed on screen.what might have gone wrong ?
Q . 8. what is a view ? why does view not require any physical storage .
Q . 9. suggest parameter mode (IN/OUT/IN OUT) for the following ?
- parameter can be used as a normal variable.
- Passed value must not get changed.
Q . 10. what do you understand by term Self join ? give an example ?
SECTION - B
Answer the following questions :
Q . 11. find the output of the following code segment
loop
dbms_output.put_line(i);
i:= i+1;
end loop;
Q . 12. write an equivalent for loop for the following code and write its output
sum :=0;
for j in 2..20
loop
sum:= sum + j;
end loop;
Q . 13. what is the significance of a login.sql file ?
Q . 14. write a pl/sql script to obtain the name of a department whose number is 30 from dept table. Display the department name on screen along with department number;
Q . 15. what are pl/sql cursor exceptions ?
Q . 16. discuss the role of the following :
- Commit
- Rollback
- Commit work
- savepoint with examples.
Q . 17. using paramaterized cursors write a piece of code that displays the name of employees of a department whose name is entered by the user . the data is to be displayed using
- simple loop
- for loop
Section - C
Q . 18. Answer the questions based on the table student below
| COLUMN NAME | DATA TYPE | SIZE | DESCRIPTION | CONSTRAINT |
| Rollno | Number |
2 |
Students rollno |
Primary key |
| Name | Varchar2 |
25 |
Name of the student |
Not null |
| Class | Varchar2 |
3 |
Class of student |
|
| Stream | Varchar2 |
15 |
Stream opted by the student |
|
| Total marks | Number |
8,2 |
Total marks scored by the student |
|
| Grade | Varchar2 |
1 |
Grade scored by the student |
Can be ‘A’ or ‘B’ or ‘C’ |
- a.write sql command to display Roll numbers, names, Total marks grades of all the students In ‘non medical ‘ stream sorted by total marks in descending order.
- write sql command to create a view consisting of all students in ‘medical’stream
And who have scored ‘A’ grade. - write a 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) - Create a Trigger to display the name and stream of student(s) whose record(s) are being
Deleted from the student table.
Q . 19. Consider the following table :
| EMPNO | SALARY | ENAME |
|---|---|---|
| 1000 | 10400 | jones |
| 1001 | 11625 | ramesh |
| 1002 | 12700 | ajay |
| 1003 | 10195 | adams |
- Write a procedure raise_sal which increases the salary of an employee . It accepts an employee number and salary increase amount . it uses the employee number to find the current salary from the employee table and update the salary.
- write the sql command to display employee number and employee name from EMPLOYEE table.
- write a pl/sql block that determines the highest paid and lowest paid employee table and print their record on the screen .
Paper By Mr. venu gopal
