CBSE International Class XII Informatics Practices Annual Examination Sample Question Paper

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1 CBSE International Class XII Informatics Practices Annual Examination Sample Question Paper Max Time: 3 hours Max Marks: (a) Name the transmission medium useful for sparsely populated areas. Ans Satellite 1 Mark for correct answer. (b) Expand the following terms: i. NRCFOSS National Resource Centre for Free and Open Source Software ii. C-DAC Centre for Development of Advance Computing (c) It is the most common communication protocol used on internet that ensures endto-end communication. Name it. TCP-IP (d) Management of Global village enterprise wants that the LAN segment in each of its buildings get a dedicated bandwidth i.e bandwidth must not be shared. Name the network device to achieve the purpose?= Routers (e) Brown confused between MAC address and IP address. Explain the difference with help of example of each. (f) One snooping method used by hacker/cracker is monitoring keystrokes made on the keyboard. Write two other snooping methods adopted by such people. (g) Compare free open source software and proprietary software with respect to customization of software and license free. 2. (a) Which property would you set for setting the password character as $ Echochar property of password field swing control. (b) Define the usage of.xml and.css files in XML. (c) While working in Netbeans, Rama included a Combo box in the form. Now she wants the list of her friends' names to be displayed in it. Which property of the control should she use to do this? Model propery. (d) Sumit has created a combo box in a form. He has included a list of countries like INDIA, JAPAN etc. Write the JAVA code to check whether the user has selected INDIA or not. if(jlist1.getselectedvalue().equals("india")) { JOptionPane.showMessageDialog(this,"You selected India"); } OR if(jlist1.getselectedindex()==0) { -1-

2 } JOptionPane.showMessageDialog(this,"You selected India"); (e) Differentiate between Check Box and Radio Button. (f) Write HTML code to produce these controls on the form i. A text box ii. A Radio Button for choosing gender. <HTML> <HEAD> <TITLE> MY Web Page</TITLE> </HEAD> <BODY> <FORM> <Input Type= "TEXT" Size=30 Name="T1"> <Input Type= "RADIO" Name="R1">MALE <Input Type= "RADIO" Name="R1">FEMALE </FORM> (g) Differentiate between i. TH and TD attributes of <TABLE> tag. ii. Start and Type attributes of <OL> tag i. TH stands for Table Heading. It is used to create Header values which are displayed in Bold font and Center aligned. TD stands for Table data. It is used to specify the Text in a cell of a table. It is used inside the <TR> tag which is inside the Table tag. ii. Start Attribute indicate the starting number of the list. This number must be the positive integer. Type attribute define the type of numbering sequence used for a list items. e.g. <OL TYPE= "A" start="3"> 3. (a) Shilpa is using already created database named COMPANY in MySQL. Now she wants to view all the tables stored in this database. Which command should she use? Show Tables; (b) If a database "SCHOOL" exists, which MySql command helps you to remove that database? Use SCHOOL; Drop database SCHOOL; (c) Principal is a column in a table Schools. The MySQL queries SELECT count(*)from Schools; and SELECT count(principal) FROM Schools, give the result 28 and 27 respectively. What may be the possible reason for this? It is because of column Principal is having one NULL value. (d) Write MySQL statement to set AutoCommit to off? Set Autocommit=0; (e) The LastName column of a table "Directory" is given below: -2-

3 LastName Batra Sehgal Bhatia Sharma Mehta Based on this information, find the output of the following queries: a) SELECT lastname FROM Directory WHERE lastname like "_a%"; b) SELECT lastname FROM Directory WHERE lastname not like "%a"; a) Last Name Batra b) Last Name Sehgal (1 mark for each correct answer) (f) Distinguish between a DML and DDL with any two commands of each category. DML It is Known as Data Manipulation Language The commands in this category are related to manipulate the data i.e. the records of the table. It contains the Select, Insert, Delete or Update commands. DDl It is Known as Data Definition Language The commands in this category are related to define the data i.e. the structure of a table. It contains create table or database with drop database command. (g) What do you understand by Partial Roll back? Explain with example. Partial Rollback is used to cancel all the transactions made upt o the specific save point. For e.g. SAEVPOINT Mark1; ROLLBACK to Mark1; In the above statements first we have created a BookMark with the name Mark1 and in the second statement it will cancel all the transactions made up to the save point Mark1 specified. 4. (a) Define object with reference to object oriented programming. Object is an instance of a class that is capable of holding actual data in memory location. (b) What will be the content of jtextfield1 after executing the following code? String st="cbse INTERNATIONAL"; jtextarea.append(""+st.substring(10)+st.length()); NATIONAL18 (c) The following code has error(s). Rewrite the correct code underlining all the corrections made : int x=10; sum=0; do { sum=+x; x--; -3-

4 }while(x>0) System.out.print(s); Correct Code: int x=10,sum=0; do { sum+=x; x--; }while(x>0); System.out.print(sum); (d) Rewrite the following program segment without using if condition. int a=7,b=5,c; if (a>b) c=a-b; else c=b-a; c=2 (e) What values will be assigned to the variables x and y after execution of the following program segment: int z=2,x=10,y=14; switch (z) { case 1 : ++x; case 2 : ++y; case 3 : case 4 : ++x; y++; break; default : x++; } x=11 y=16 (f) Find output of the following java code snippet: int x=5,y=3; double p=0; p=math.pow(++x,y--); JOptionPane.showMessageDialog(this,p); (g) Mr. Daniel, an IT-Officer at Super Store is creating an EMI Software to generate the EMI Amount as per the given interface. -4-

(3) Employee Type Basic Salary DA (% of Basic Sal) HRA (% of Basic Sal) Non Teaching 12500 31 30 12 PGT TGT PRT 14500 12500 11500 30 21 20 30 30 25 12 12 12 Deductions (% of Basic sal) a.

5 (3) Employee Type Basic Salary DA (% of Basic Sal) HRA (% of Basic Sal) Non Teaching PGT TGT PRT Deductions (% of Basic sal) a. Write the code to calculate the Basic salary, deductions, gross salary and net salary based on the given specification. Add 3000 to net salary if employee is working for more than 10 years. Gross salary=basic salary + DA + HRA Net salary = Gross salary deductions b. Write the code to clear all textfields, uncheck checkbox and set non teaching as the default category. c. Write the code to disable textfields & set the default value as 0 for gross salary, deductions and netsalary. 5. (a) Distinguish between ALTER and UPDATE table command. ALTER UPDATE 1. It is a DDL type command. 1. It is DML type command. 2. It is used to modify the structure 2.It is used to modify the existing of a table. data in the table. (b) Write output of the following SQL query: (i) SELECT ROUND(6.5675,2); (ii) SELECT TRUNCATE(5.3456,1); (iii) SELECT DAYOFMONTH( ); (iv) SELECT MID( CLASS 12,2,3); i) 6.57 ii) 5.3 iii) 25 iv) las ( ½ Mark each for each correct answer) (c) Consider the table TEACHER given below. Write commands in SQL for (i) to (v) and output for (vi) to (ix)- (7) -5-

6 TEACHER ID Name Department Hiredate Category Gender Salary 1 Tanya Nanda SocialStudies TGT F Saurabh Sharma Art PRT M Nandita Arora English PGT F James Jacob English TGT M Jaspreet Kaur Hindi PRT F Disha Sehgal Math PRT F Siddharth Kapoor Science TGT M Sonali Mukherjee Math TGT F i. To display all information about teachers of PGT category. ii. To list the names of female teachers of Hindi department. iii. To list names, departments and date of hiring of all the teachers in descending order of date of joining iv. To display the list of teachers whose name start with J. v. To display names of all TGT teachers whose salary is in the range of vi. SELECT MAX(Hiredate) FROM Teacher; vii. SELECT DISTINCT(category) FROM teacher; viii. SELECT COUNT(*) FROM TEACHER WHERE Category = "PGT" ix. SELECT AVG(Salary) FROM TEACHER group by Gender; i. SELECT * FROM teacher WHERE category = 'PGT'; ii. SELECT name FROM teacher WHERE Gender = 'F' AND Department = 'Hindi'; iii. SELECT name, department, hiredate FROM teacher ORDER BY hiredate desc; iv.select * FROM Teacher WHERE Name LIKE J% ; v.select Name FROM Teacher WHERE Category = TGT And Salary BETWEEN AND 30000; (1 Mark each for each correct query) v vi. TGT PRT PGT vii. 1 viii (½ Mark each for each correct output) 6. (a) Write the SQL command to create the table MENU including its constraints. Field Type Constraints ItemCode Integer Primary Key ItemName Varchar (20) Not Null Category Varchar(20) Quantity Integer Price Decimal(6,2) Create table MENU ( Itemcode integer Primary Key, itemname varchar(20) NOT NULL, Category varchar(20), Quantity integer, -6-

7 Price decimal(6,2) ); ( ½ Mark for CREATE TABLE Menu) ( ½ Mark for appropriately putting Primary Key constraint) ( ½ Mark for correct data types) ( ½ Mark for correct syntax of the query) (b) Consider the table Sender and Recipient as shown below : CONSIGNOR CnorID CnorName CnorAddress CITY ND01 R Singhal 24, ABC Enclave New Delhi ND02 Amit Kumar 123, Palm Avenue New Delhi MU15 R Kohli 5/A, South Street Mumbai MU50 S Kaur 27-K, Westend Mumbai CONSIGNEE CneeID CnorID CneeName CneeAddress CneeCity MU05 ND01 Rahul Kishore 5,Park Avenue Mumbai ND08 ND02 P Dhingra 16/J, Moore Enclave New Delhi KO19 MU15 AP Roy 2A, Central Avenue Kolkata MU32 ND02 S Mittal P 245, AB Colony Mumbai ND48 MU50 B P Jain 13, Block D, A Vihar New Delhi With reference to these tables, answer the questions (i) and (ii). (i) Which column in the CONSIGNEE table is the foreign key? CnorID (ii) Write a query to display the number of consigners from each city. SELECT Count( *) FROM CONSIGNOR GROUP BY City; Consider the tables EMPLOYEES & EMPSALARY. statements (i) to (iii). Write SQL commands for the (6) Table: EMPLOYEES EMPID FIRSTNAME LASTNAME ADDRESS CITY 010 George Smith 83,First Street Howard 105 Mary Jones 11,Red Road Paris 152 Sam Tone 33,ELM Str Paris 215 Rachel Lee 12,Morre Str Boston 244 Mnilla SenGupta 24 Friends Str New Delhi Table: EMPSALARY EMPNO SALARY BENEFITS DESIGNATION Manager Director Manager Clerk Salesman (i) To display employee id, designation and total salary given in employee salary table [total salary should be calculated as Salary + Benefits ]. -7-

8 SELECT EMPID, DESIGATION, Salary + Benefits As Total Salary FROM EMPSALARY; (ii) To display the details of all employees whose designation is Manager or city name is New Delhi. Select Employees.* FROM Employees, Empsalary WHERE EMPID =EMPNO AND designation = Manager or city = New Delhi. (iii) To display employee id, first name, last name and salary of employees who are not getting any benefits. SELECT EMPID, Firstname,Lastname, Salary FROM Employees, Empsalary WHERE EMPID =EMPNO AND Benefits is NULL; 7. (a) Write two impacts of ICT on society. Social Networking Sites help people remain in touch with their nears and dears even when they are staying on opposite sides of the globe. These sites help like minded people come together and work for some cause. ICT helps economy grow at a faster rate as it provides transparency in the processes and helps the government to keep check on defaulters. (b) Write two important features of i. e-business e-business applications use technology to effectively access and deliver business related services and perform various kinds of business transactions. ii. e-learning e-learning applications use technology to effectively deliver and monitor learning and teaching processes. They help the trainer to organize and manage the lesson plans, present them to students/learners, evaluate and take the feedback to enhance and fine tune this process in future. (c ) Ravi works for a Sports Company. She wants to create controls on a form for the following functions. Choose appropriate controls from Text Field, Label, Radio Button, Check box, List, Combo Box, Button and write in the third column. S.No. Controls used to Name of the Control 1. Enter Team name Text Field 2. Select Sports type Check Box/Radio button/list box 3. Enter Number of Members Text Field/Combo box 4. To save the details Command Button -8-

PRE BOARD EXAM Sub:Informatics Practices (065) Class:XII

PRE BOARD EXAM Sub:Informatics Practices (065) Class:XII Max Marks:-70 PRE BOARD EXAM 2010-11 Sub:Informatics Practices (065) Class:XII Time :3 Hrs. 1. (a) Two doctors in the same room have connected their Palm Tops using Bluetooth for working on a Group presentation.