CBSE Class 12 Informatics Practices Question Paper 2022 Set 01 Solved

Informatics Practices
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Class 12 Informatics Practices Solved Question Papers: CBSE Class 12 Informatics Practices Question Paper 2022 Set 01 Solved

Explore authentic exam materials through the CBSE Class 12 Informatics Practices Question Paper 2022 Set 01 Solved. Tailored for Class 12 learners, utilizing these Informatics Practices previous year papers ensures thorough preparation and strengthens time management skills before final CBSE evaluations.

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Q1. a) How SWITCH is different from HUB? Explain 
b) What is the purpose of IP address of computer ? 
c) How BUS topology is different from STAR topology? 
d) Which of the following are valid IP addresses ? Give reason(s) if invalid.
 
(i) 121.23.1.45
(ii) 192.168.0.254
(iii) 192.168.AS.1
(iv) 198.-1.1.1
 
e) How Cracker is different from Hacker in Computer Science? 
f) Identify the odd one out of the following :
Optical Fiber/Coaxial Cable/Bluetooth/Twisted Pair Cable Give reason for your answer.
 
g) Define Network. Write any two application of network. 
h) Define Domain Name Resolution. . 
i) Write the full form of a) CDMA b)GSM 
j) Explain the following term a) Firewall b) Snooping 
 
Q2. a) How WHERE clause is different from HAVING Clause? Explain with an example. 
b) What is the use of BETWEEN AND operator in mysql? Explain with an example.
c) Find the output of the following:
1. Select left(concat(“ABCD”,”EFG”),2);
2. Select dayofyear(“2017-02-04”);
3. Select round(5567.78,1)+truncate(3758.91,1);
4. Select pow(length(“Chennai”),4);
5. Select instr(“FLOOR”,”OR”);
 
d) Ms. Rhea created the table EMPLOYEE with the following fields:
ENO,ENAME,ESALand DEPTNO. While creating a table she forgot to add the primary key. Help her to add the primary key to the above table and identify the primary key field.
 
e) Define Transaction and write all the commands under TCL. 
f) Karanwants to add another column „Gender‟ in the already existing table „CUST‟.he has written the following statement.
However, it has errors. Rewrite the correct statement.
 
CHANGE TABLE CUST GENDER char(1);
 
g) How Single Row functions are different from Aggregate Functions. Explain with an example.
 
h) Given below is the „Department‟ table :

CBSE Class 12 Informatics Practices Question Paper 2022 Set A Solved 1

SET AUTOCOMMIT = 0;
UPDATE Department SET DEPNAME = „IT‟ WHERE
DEPNAME = „PERSONAL‟;
INSERT INTO Department VALUES(104,„SALES‟);
UPDATE Department SET DEPNAME = „FRONT OFFICE‟ WHERE
DEPNAME = „RECEPTION‟;
COMMIT;
DELETE FROM Department WHERE DEPNAME = „FRONT
OFFICE‟;
ROLLBACK;
SELECT * FROM Department;
 
What will be the output of the above given SELECT statement ?
 
i) “A & B” Company conducts workshops for employees of organizations.The company requires data of workshops that are organized. Write SQL query to create a table „Workshop‟ with the following structure :

CBSE Class 12 Informatics Practices Question Paper 2022 Set A Solved 2

j) Consider the Table “ Employee” shown below :

CBSE Class 12 Informatics Practices Question Paper 2022 Set A Solved 3

Write the commands in SQL for (i) to (viii) and output for (ix) and (x).
 
(i) To display the details about the Employee name which contains the character“i” anywhere.
 
(ii) To list the names of employee and their salary who are all in C and B grade.
 
(iii) To list the names who are all in South and their department is Comp.
 
(iv) To display the number of employees in each grade.
 
(v) Write a Query to display the structure of the table.
 
(vi) To increase the salary of the employees by 10 % those who are all from “SOUTH”.
 
(vii) To display the minimum salary from the table employee.
 
(viii) To display all the employees namein descending order of their grade.
 
(ix)SELECT MID (ename,length(“A”)) FROM employee;
 
(x) SELECT MAX(salary)-MIN(SLARY) FROM EMPLOYEE GROUP BY AREA;
 

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exams?

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