Sample paper for class 12 Informatics Practices

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Download CBSE sample paper for class 12 Informatics Practices from myCBSEguide. Sample paper for class 12 Informatics Practices for board exams are available for download in myCBSEguide app, the best app for CBSE students. Sample Paper for class 12 Informatics Practice includes questions from Informatic Practices, Published by CBSE. CBSE conducts board exam for CBSE students which will cover the whole book.

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Informatics Practices Sample papers

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Sample Paper for class 12 Informatics Practices
Session 2017-2018


1. (a) Mr. Ravi, an IT Help Desk executive needs to remotely login a customer’s PC to provide him technical support. Suggest a remote access software to him. (1)

(b) Identify the type of network (out of LAN/PAN/MAN/WAN) formed in the given diagram: (1)

Sample paper for class 12 Informatics Practices

(c) Identify the fastest wired media out of the following: Ethernet cable, Optical fiber, Co-axial cable (1)

(d) Mention any two main advantages of star topology over bus topology. (1)

(e) Discuss the significance of Bluetooth technology. (2)

(f) I. Write down any two advantages of Open Source Software over Proprietary software.

II. Ms. Sita trying to log into your Internet Banking account for online transaction activity. However, as strange as it may seem, she is denied of an access to the bank’s website, in spite of having a swift internet connection. What do you think the reason behind this problem is and suggest her few simple precautions in order to overcome any such type of network security threats. (4)

2 (a) I. Help Manish in identifying the incorrect variable name with justification from the following: (4)
i. [email protected]; ii. fee; iii. userid; iv. avg marks;
II. Write Java code to declare a variable named Price of integer type. Assign a value 10 to this variable. Overwrite the value of price with its double value. Decrease the value of price by 5.

(b) Rewrite the following code using switch case: (2)

int day=Integer.parseInt(jTextField1.getText());

2if(day>=1 && day<=5)

jOptionPane1.showMessageDialog(this, “Working Day”);

else if(day>=6 && day<=7)

jOptionPane1.showMessageDialog(this, “Off Day”);

else

jOptionPane1.showMessageDialog(this, “Invalid Entry”);

(c) i. Ms. Sangeeta wants to add few descriptive lines in the HTML code which should not be displayed on the webpage rather should remain inactive during execution. Suggest her the solution along with example. (4)

ii. How HTML is different from XML? Mention any two point of difference.

3 (a) Mention any two example of common Database Management System. (1)

(b) Write the full forms of the following: (1)

i. DDL ii. DML

(c) Ms. Archana, a class XI student has just started learning MySQL. Help her in understanding the basic difference between Alter and Update command with suitable example. (4)

Also suggest her suitable command for the following purpose:

i. To display the list of the database already existing in MySQL.

ii. To use the database named City.

iii. To remove the pre-existing database named Clients.

iv. To remove all the records of the table named “Club” at one go along with its structure permanently.

(d) Observe the given table named “Loan” carefully and predict the output of the following queries: (4)

Loan

File_noCust_NamePhoneNoLoan_AmtBankCheque_Dt
619095Ms. Roshni9899965430809876HBDC Ltd.2017-06-15
234252Mr. Rajesh8654327890745738ICUCI Ltd.2017-07-22
543613Mrs. Sapna8883546354NULLNBI Ltd.S2017-07-24
435467Mr. Navneet9764747474647484ICUCI Ltd.2017-08-13
263427Ms. Puja8746454742546373HBDC Ltd.2017-08-30

i. select count(file_no)-count(loan_amt) from loan;

ii. select Cust_Name,Loan_Amt from loan where month(cheque_dt)=7;

iii. SELECT concat(left(file_no,2),right(cust_name,2)) AS “ID” from loan

where Bank=’ICUCI Ltd.’;

iv. select round(loan_amt-loan_amt*10/100) As “Discounted Payment” from

loan where loan_amt>700000;

4 (a) Write down the full forms of the following: (1)

i. URL ii. IDE

(b) Which property is to be used during design time to add a number of countries in the list box? (1)

(c) What will be the final value of variable x after the following code is executed: (1)

int x=10;

while(x>1)

{

x=x/3;

++x;

}

(d) i. Find the output of the following Java code snippet after execution of each java statement labelled as Line 1, Line 2, Line 3, Line 4: (4)

String userid=”INDIA”,pwd=””;

pwd=userid.substring(0,2); //Line 1

int l=userid.length(); //Line 2

pwd=pwd.toLowerCase(); //Line 3

pwd=pwd.concat(“”+l); //Line 4

ii. Rewrite the following code using for loop:

int attempt=0;

while(attempt<=3)

{

String login=jTextField1.getText();

String pwd=jTextField2.getText();

if(login.equals(“XII”) && pwd.equals(“IP”))

{

jOptionPane1.showMessageDialog(null, “Welcome”);

break;

}

else

jOptionPane1.showMessageDialog(null, “Pl try again”);

attempt++;

}

(e) The following code has error(s). Rewrite the correct code underlining all the corrections made: (2)

int start=2;end=20;

do;

{

start=start+start;

while(start<=end)

(f) Ms. Neelam works as a programmer in “Kidz Entertainment Zone”. She has designed a Registration Page to calculate the total fee of summer camp depending upon the number of activities selected by the user considering age eligibility as well. A screenshot of the same is shown below:
Sample paper for class 12 Informatics Practices
Help her in writing the code to do the following: (6)

i. After entering the age in the specified text field, when ‘Chk Eligibility’ button is clicked, a dialogue box should be displayed with a message “Welcome” if age is in between 3-13 years else there should be a message “Sorry! You are either underage or overage!!”. Additionally the application should be closed if age is inappropriate.

ii. After selecting the desirable activities, total fee should be displayed in the specified text field on the click of “Proceed” button at the rate of Rs. 1000 per activity.

iii. A discount of 20% is applicable if more than one activity is chosen by the user.

iv. After clicking on the “Net Fee” button, Net Fee should be calculated and displayed in the respective text field as per the given formula:
Net Fee = Fee – Discount

5 (a). While creating a table named “Employee”, Mr. Rishi got confused as which data type he should chose for the column “EName” out of char and varchar. Help him in choosing the right data type to store employee name. Give valid justification for the same. (2)

(b) Ms. Shalini has just created a table named “Employee” containing columns Ename, Department, Salary.
After creating the table, she realized that she has forgotten to add a primary key column in the table. Help her in writing SQL command to add a primary key column empid. Also state the importance of Primary key in a table. (2)

(c) Consider the following table: (4)

Student:

AdmnNameStreamOpticalAverage
1001ShrishtiScienceCS90
1002AshiHumanitiesMaths80
1003AdityaCommerceIP60
1004Ritu RajScienceIP65
1005SonaliCommerceMaths60
1006SaumyaScienceIP65
1007AshutoshScienceIP95
1008ParshantCommerceP.ED80
1009AmanCommerceIP70
1010RishabhHumanitiesP.ED85

Write commands in SQL for (i) to (iv):

i. To display the details of all those students who have IP as their optional subject.

ii. To display name, stream and optional of all those students whose name starts with ‘A’.

iii. To give an increase of 3 in the average of all those students of humanities section who have Maths as their optional subject.

iv. To display a name list of all those students who have average more than 75.

(d) On the basis of the Table Student, write the output(s) produced by executing the following queries: (2)

i. Select max(average), min(average) from students group by stream having stream like ‘Science’;

ii. Select name from students where optional IN (‘CS’,’IP’);

6 (a) Write SQL query to create a table “Registration” with the following structure: (2)

Table: Registration

Field nameDatatypeSizeConstraint
Reg_IdInteger2Primary Key
NameVarchar20
CourseVarchar10
Joint_DtDate

(b) Consider the tables given below while attempting the following questions:

Train

TrainIDTNameSourceDestination
3402Century ExpressNew DelhiMumbai
4023Superfast ExpressKanyakumariChandigrah
3424Lucknow MailLucknowNew Delhi
6542Capital ExpressChennaiKolkata
9876Punjabi MailPatnaLudhiana
5400Century ExpressNew DelhiKanpur

Reservation

REfNo.TrainIDPassengerJourneyDate
S0014023Shubham Singh2017-07-02
C0026542Jishan Mittal2017-06-25
S0024023Jessica Raj2017-07-02
P0019876Paramjeet Singh2017-07-22
S0034023Gurjyot Singh2017-07-03
C0026542Akash Mukharjee2017-06-25
P0029876Meera Devi2017-07-22
L0013424Ruby Lal2017-06-29
C0035400Tapshree2017-07-04

(i) Identify the primary key column of Train and Reservation. (1)
(ii) Help Mr. Sajal in identifying the wrong statement with reference to UNION clause: (1)

a. Each SELECT statement within UNION must have the same number of columns

b. The columns must also have similar data types

c. The columns in each SELECT statement must also be in the same order.

d. By default, the UNION operator selects all the values.

(c) With reference to the above given tables, write commands in SQL for (i) and (ii) and output for (iii) below: (6)

i. To display the Train name along with its passenger name.

ii. To display Train detail which has no reservation yet.

iii. SELECT T.* from Train T, Reservation R where T.TrainId=R.TrainId

AND Source LIKE “%Delhi” OR Destination LIKE “%Delhi”;

7 (a) Write down any two benefits of net banking. (1)

(b) Mr. Sanjay, a banking professional want to enroll himself in an e-Learning course. Mention him any two challenges of e-Learning. (2)

(c) Ms. Juhi, works as an IT Executive in a health insurance company named ‘Total Health’. She has been assigned a task to design a customer registration page. Help her in choosing the most appropriate controls for the specified task from (2)

Textfield, Label, RadioButton, CheckBox, ListBox, ComboBox, Button and write in the third column considering the following points:

  • Customer can enter his/her name in the control.
  • Customer can choose only one city out of given list of city.
  • Customer can choose only one type out of given policy types.
  • Customer can choose any number of INCLUSIONS out of given inclusions.
S.No.Control Used toControl
1.CUSTOMER’S NAME
2.CUSTOMER’S NAME
3.POLICY TYPE(individual/Family)
4.INCLUSIONS (Critical Illness/Accidental Coverage / Health Checkup/Others)

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Marking Scheme for Class 12 Board exam

SubjectBoard MarksPractical or internal Marks
English100 MarksZERO Marks
Hindi100 MarksZERO Marks
Mathematics100 MarksZERO Marks
Chemistry70 Marks30 Marks
Physics70 Marks30 Marks
Biology70 Marks30 Marks
Computer Science70 Marks30 Marks
Informatics Practices70 Marks30 Marks
Accountancy80 Marks20 Marks
Business Studies80 Marks30 Marks
Economics80 Marks20 Marks
History80 Marks20 Marks
Political Science100 MarksZERO Marks
Geography70 Marks30 Marks
Sociology80 Marks20 Marks
Physical Education70 Marks30 Marks
Home Science70 Marks30 Marks

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