KENDRIYA VIDYALAYA SANGATHAN BLUE PRINT INFORMATICS PRACTICES(065) CLASS XII. Total Marks Questions VSA SA I LA Total 34 70

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1 KENDRIYA VIDYALAYA SANGATHAN BLUE PRINT INFORMATICS PRACTICES(065) CLASS XII Type of Questions Marks per Question Total No. of Total Marks Questions VSA 8 8 SA I 0 40 LA 6 0 Total Unit Topic VSA( SA( LA(6 Mark) Total mark) Mark) Unit-I Networking and Open () 4(8) 6(0) Standards Unit-II Java Programming 7(7) 6() (6) 4(5) Unit-III MySQL 8(8) 8(6) (6) 7(30) Unit-IV IT Applications () (4) 3(5) Total 8(8) 0(40) () 40(70)

2 MODEL QUESTION PAPER SUB: INFORMATICS PRACTICES (065) CLASS XII MM: 70 TIME: 3 Hrs Q. What is an IP Address? How is it different from MAC address? Differentiate between Domain name and URL with suitable example How is coaxial cable differ from optical fibre? (d) Two neighborhood schools, at a distance of 0 meters from each other, decide to join their LANs using UTP cable so that they can share their e-learning resources. But after joining their LANs they are not able to share the resources due to loss of signal inbetween. Which device should they use so that signal is amplified in-between? (e) Read the given activities carefully and mention whether the activity is snooping or eavesdropping: i. Getting someone s login information by casually watching what he/she is typing. ii. Setting up unauthorized parallel telephone lines iii. Installing some software/hardware which captures the data while on its way. iv. Reading the files on someone s computer in an unauthorized manner Which of the following softwares are Open source. (f) Linux, MS Windows 7, Photoshop, MySQL. Q. Mr. Nayak has developed a Java application for a school, in which, a combo box is made on the form for selecting class. Name the property which Mr. Nayak should use to add the class s data in combo box. Aryamani is creating a simple application in java called "Name Concatenator" in which he needs to concatenate the first name, middle name and last name input by the user in separate text fields. Name a method and an equivalent operator for this purpose What is wrong with the following : <OL type= a start= d > What will be displayed in jtextfield and jtextfield after the following code is executed: int num = 35, num = 46 ; jtextfield.settext( num + num + " " ) ; jtextfield.settext( " " + num + num ) ; (d) Rewrite the following program code after removing syntax error : int i=7; r=8; do { system.out.println(r*i); i =+; } while (i<=0) (e) Find output of the following java code snippet: String word="highrise"; String wordlc = word.tolowercase();

3 for (int i = 0; i < wordlc.length(); i+=4) { String extstr = wordlc.substring(i,i+); jtextarea.append(extstr+"\n"); } (f) Write the value of variable c after execution of the following code : int c,d=7; c = (5*++d)%3; Q.3 (d) (e) (f) (g) (h) Seema had previously created a table named Product in a database using MySQL. Later on she forgot the table structure. Suggest her suitable MySQL command through which she can check the structure of the already created table Riya wants to list the names of all the tables in her database named Gadgets. Which command (s) she should use to get the desired result. If a database employee exists, which MySql command helps you to start working in that database? Pooja, a student of class XI, created a table Book. Price is column of this table. To find the details of books whose prices have not been entered she wrote the following query: SELECT * FROM BOOK WHERE PRICE=NULL Help Pooja to run the query by removing the errors from the query and rewriting it. Smriti is not able to change a value in a column to NULL. What constraint did she specify when she created the table? Distinguish between a Primary key and Candidate key with the help of suitable example of each. A table Customers in a database has 5 columns and no rows in it. What is its cardinality? What will be its cardinality if 4 rows are added in the table? What is the purpose of following SQL query: SELECT MAX(SALARY) FROM EMP; Q.4 What is an abstract class? A phone number consisting of 0 digits is stored in a string variable strphone. Now Mr. Dev wants to store this phone number in a Double type of variable DblPhone. Write Java statement to do this. (d) Convert the following loop in do-while loop. int x=0; while(x<=) { System.out.println( x ); x=x+; } Rewrite the following program code using switch statement. if(code==) Month= January ; else if(code==) Month= February ; else if(code==3) Month= March ; else Month= No Match ; (e) What will be displayed in jtextarea after executing the following statement? jtextarea.settext( Kendriya\tVidyalaya\nSangathan );

4 (f) (g) Carefully study the code given below: String Message = "Hello! How are you?", Msg, Msg; Msg = Message.substring(7); Msg = Message.substring(0,5); What will be the contents of the variables Msg and Msg after the above statements are executed? RajMahal Hotel computerized its Billing System. Given below the data entry screen through which bill amount is calculated. Q.5 RATE BREAKFAST LUNCH DINNER VEG NON VEG i) Write the code for calculate button to calculate amount as per the rate specified in the table, service tax (% of amount). Total bill amount=total + service tax. ii) Write the code to clear all textfields, uncheck checkbox and set Veg as the default option. iii) Write the code to make textfields tfamount, tfbillamount non editable. Explain the purpose of DDL and DML commands used in SQL. Also give two examples of each. Write the output of following SQL queries: (i) SELECT ROUND(6.5675,); (ii) SELECT TRUNCATE(5.3456,); (iii) SELECT DAYOFMONTH( ); (iv) SELECT MID( CLASSS,,3); Consider the table STUDENT given below, write SQL Commands for (i) to (iv) and output for (v) to (vii) RollNo Name Class DOB Sex City Marks Nandu X 6/6/95 M Agra 55 Saurabh XII 7/5/93 M Mumbai 46 3 Sania XI 6/5/94 F Delhi Tripti XII 8/8/95 F Mumbai Sumit XII 8/0/95 M Delhi Manisha XI //94 F Dubai 50 7 Neha X 8//95 F Moscow Nishant X /6/95 M Moscow

5 Q.6 (i) To Display all information about class XI students. (ii) List names of all students of XII Class who belong to Mumbai city in descending order of DOB. (iii) To count the number of student class wise. (iv) To decrease the marks of students by % of class XI students (v) SELECT DISTINCT(city) FROM Student; (vi) SELECT sum(marks) FROM Student GROUP BY Sex; (vii) SELECT name FROM Student where DOB> //94 ; (viii) SELECT COUNT(*)FROM STUDENT WHERE NAME LIKE S% Write an MySQL query to create the table Item with the following structure: Field Type Constraint ItemCode integer Primary Key ItemName Varchar(0) Not null Category Varchar(0) Default Chinese Price Decimal(5,) check>00 Consider the tables Client and BILL given below: Table : Client Cust_Id Cust_Name Address Phone_no City C007 Pritam,M.G Road Bangalore Sharma C008 Sutopa 4/ Pritam Delhi Pura C00 Anurag Basu 5A, Park 689 Kolkata Road C0 Hrithik 7/ Vasant 6949 Delhi Kunj C03 Firoz Shah, Servamali 5049 Bangalore C05 Vinod Nagpal road 46-a Navi Mumbai Mumbai Table : BILL Ord_Id Cust_Id Item Ord_date Qty Price 700 C007 Pizza C03 Garlic Bread 7004 C0 Pasta C00 Ice Cream With reference to these tables, write command in SQL for (i) and (ii) & output for (iiiv). I. Display a report containing cust_id, cust_name, Item, qty and price. II. Display name of customers who have ordered Pizza. III. Select Cust_name from Client where Cust_id=( Select Cust_id from Bill where Year(ord_date) =008); IV. Which column in the BILL table is the foreign key? V. How many rows & columns will be there in cross join of these two tables? Q.7( How does e-business improve customer satisfaction? Write one point. a) How has our society benefited from e-governance? Write points

6 Vijayan works for the Customs Department. He wishes to create controls on a form for the following functions. Choose appropriate controls from Text Field, Label, Option button, Check box, List box, Combo box, button and write in the third column: S.No. Controls use to Control Enter Last Name Enter Gender 3 Choose City from a list of cities 4 Submit Form

7 Q. (d) (e) (f) INFORMATICS PRACTICES (065) ANSWER KEY IP Address: Every machine on a TCP bar IP Network has a unique identifying no. called an IP Address. e.g MAC Address:-It refers to the physical address assigned by NIC manufacturers. It is a unique 6 byte address separated by colon where first three bytes refer to manufacturer id and last three are card no. IP Address is virtual address and MAC address is Physical address MAC address is provided by NIC manufacturer and IP address is provided by ISP (mark for definition of IP and mark for difference) Domain Name:- It is a unique name assigned to a website. It has three parts: i) www ii) Name describing the website s purpose iii)tld(top Level Domain) such as.com,.net,.in,.edu,.org etc. eg: URL(Uniform Resource Locator): The uniform resource locator (URL) is the unique identifier of a web page. Eg. Coaxial Cable A cable consisting of two concentric conductors (an inner conductor and an outer conductor) insulated from each other by a dielectric, commonly used for the transmission of high-speed electronic data and/or video signals. Coaxial Cable are relatively cheaper than Optical Fibre Have Low transmission Speed than Optical fibre External interference is there in coaxial cable Optical Fiber: A flexible optically transparent fiber, usually made of glass or plastic, through which light can be transmitted by successive internal reflections Very expensive High transmission speed No External interference (/ mark for each difference) Repeater ( mark for the correct answer) i. Snooping. ii. Evasdropping iii.evasdropping. iv. Snooping (/ mark for each correct answer) Linux and MySQL. (/ mark for each correct answer) Q. model Property ( mark for each correct answer) Method- concat Operator- + (/ mark for each correct answer) Start attribute cannot have value as d. it must be 4. ( mark for each correct answer) jtextfield= 8 jtextfield= 3546 ( mark for each correct output)

8 (d) 56 7 ( mark for each correct output) (e) hi ri ( mark for each correct output) (f) C= ( mark for each correct answer) Q.3 Desc Product ( mark for each correct answer) Use Gadgets Show Tables; ( mark for each correct answer) Use employee ( mark for correct answer) (d) She should write the query as : SELECT * FROM BOOK WHERE PRICE IS NULL ( mark for correct answer) (e) (f) (g) (h) Q.4 (d) Not Null ( mark for each correct answer) Primary Key: Set of one or more attributes that can uniquely identify tuples with in the relation. Candidate Key: A Candidate Key is the one that is capable of becoming Primary key i.e., a field or attribute that has unique value for each row in the relation. In student table, AdmNo and RollNo is candidate keys whereas we can make Admno as Primary key ( mark for the definition and mark for the example) Cardinality=0 After adding rows, Cardinality=4 ( mark for each correct answer) To display the maximum salary from Emp table ( mark for correct answer) The classes for which it is not essential to declare objects to use them are known as abstract classes like JOptionPane ( mark for correct answer) double DblPhone= Double.parseDouble( strphone); ( mark for correct answer) int x=0; do { System.out.println( x ); x=x+; } while(x<=); ( marks for correct answer) switch(code) { case : Month= January ; break; case : Month= February ; break; case 3: Month= March ; break; default: Month= No Match ;

9 } ( marks for correct answer) (e) Kendriya Vidyalaya Sangathan ( mark for correct answer) (f) Msg = How are you? Msg = Hello ( mark for each correct answer) (g) (i) mark for the correctly calculating and displaying amount mark for the correctly calculating and displaying service tax mark for the correctly calculating and displaying total bill amount ii) mark for clearing the text fields and mark for unchecking check boxes and checking radio button as default. iii) textfields.seteditable(false) tfamount.seteditable(false) tfbillamount. seteditable(false) Q.5 Q.6 Data Definition Language: Part of the SQL that facilitates defining creation/modification etc. of database object such as tables etc. DML: Data Manipulation Language. Part of the SQL that facilitates manipulation (additions/deletions/modification) of data which residing in the database tables. Eg: DDL- Create table, Alter and Drop tbale DML- Insert, Update and Delete Write the output of following SQL queries: (i) 6.57 (ii) 5.3 (iii) 5 (iv) LAS (/ mark for each correct output) Consider the table STUDENT given below, write SQL Commands for (i) to (iv) and output for (v) to (vii) (ix) Select * from student where class= IX ;. (x) Select name from student where Class= XII and City= Mumbai ; (xi) Select count(*) from student group by class (xii) Update Student set marks= marks- marks*0.0 Where class= XI ; (xiii) Agra Mumbai Delhi Dubai Moscow (xiv) M 87 F 477 (xv) Nandu Tripti Sumit Neha Nishant (xvi) 3 mark for each correct query and ½ mark for each correct output Write an MySQL query to create the table Item with the following structure: Create table Item

10 ( ItemCode integer(4) Primary key, ItemName varchar(0) Not Null, Category varchar(0) default chinese, Price Decimal(5,) check(price>00)); ( marks for correct syntax) VI. Select cust_id,cust_name,item,qty,price From Client c, Bill b Where c.cust_id= b.cust_id; VII. Select Cust_name From Client c, Bill b Where c.cust_id= b.cust_id and b.item= Pizza ; VIII. Anurag Basu IX. Cust_Id X. Rows= 4 and Cols= Q.7(a ) ( marks for i-iii and mark for correct output for iv-v) Customers can compare the prices of a product from various websites and can choose the best alternative ( mark for the correct answer) Transparency in the government system Saves time and efforts to visit govt. offices ( mark for each correct point) S.No. Controls use to Control Enter Last Name Text Field Enter Gender Radio Button 3 Choose City from a list of cities Combo Box 4 Submit Form Button

KENDRIYA VIDYALAYA SANGATHAN, CHENNAI REGION CLASS XII COMMON PRE-BOARD EXAMINATION

KENDRIYA VIDYALAYA SANGATHAN, CHENNAI REGION CLASS XII COMMON PRE-BOARD EXAMINATION Sub : Informatics Practices (065) Time allowed : 3 hours Maximum Marks : 70 Instruction : (i) All questions are compulsory