KENDRIYA VIDYALAYA SANGATHAN ERNAKULAM REGION FIRST PRE-BOARD EXAMINATION

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1 KENDRIYA VIDYALAYA SANGATHAN ERNAKULAM REGION FIRST PRE-BOARD EXAMINATION 04-5 INFORMATICS PRACTICES Time allowed: 3 hours Maximum Marks: 70 Instructions: (i) All questions are compulsory. (ii) Programming language : Java, SQL.. (a) Vipin wants to transfer data from one computer to another computer by using telephone cable.tell him the device which he will use for this purpose. (b) What is the difference between Switch and Hub. (c) Write the name of the physical address which is assigned to each NIC by its manufacturer. (d) Sanya wants to connect her computer with the LAN but she is unable to connect it. Suggest her the device which she will fix in her computer so that she will be able to connect LAN cable with her computer. (e) Compare Freeware and Proprietary software. (f) How is Coaxial cable different from Optical Fiber? (g) What are Denial of Services Attacks?. (a) Yuvan has created a login form to input username and password. He wants $ sign to be displayed instead of * in the password area. Which property of password component should he change to do the same? (b) Which HTML tag is used to insert image in the web page? State its main attributes (c) Which HTML tag is required to display text in Bold. Give one example. (d) State the methods used to make Textfield )disable )uneditable? (e) Write a function in java that takes cost price and selling price of a good as input and display if the shop keeper made profit and 0 if he had made loss. (f) Explain the difference between empty element and container element in HTML. Also give example. (g) Write four features of XML 3. (a) Ram is not able to repeat a name in the NAME field of the STUDENT table. What is the constraint he has used to achieve this? (b) If a database Library exists, which MySql command helps you to start working in that database. Also write the command to display the tables in database. (c) Differentiate between DDL and DML commands. (d) What is the purpose of following SQL query? SELECT COUNT(ENO) FROM ELECTION GROUP BY PARTY; (e) A table Employee in a database has 4 columns and rows in it. After adding 3 more rows in the table What is its cardinality and degree? (f) Find out is the error(s) in this MySQL query SELECT * FROM ELECTION WHERE PLACE = NULL; (g) The ENAME column of the table ELECTION as shown below. Page of 5

2 Based on the above ENAME GIRISH AKSHAY RAJESH SHAKSHI TARANG DINESH information give the output of the following SQL query. a) SELECT ENAME FROM ELECTION ORDER BY ENAME; b) SELECT ENAME FROM ELECTION WHERE ENAME LIKE %H ; 4. (a) The Admission No. of a student is stored in a string variable stradmno. Sugandha wants to store this admission no. in an Integer type variable intadmno. What java statement should she write to do this? (b) What will be displayed in jtextfield after executing the following statement: String str = "" ; for( int i = ; i <= 5 ; i++ ) str = str + i ; jtextfield.settext( str ) ; (c) What will be displayed in jtextfield after executing the following statement: jtextfield.settext( "Hello".subString( ).length( ) + "" ) ; (d) How many times the following while loop get executed?what is the value of p after the execution? int p=5; int q=36; while(p<=q) { p+=6; } (e) Rewrite the following code using for loop: int i = ; while( i < 5 ) { System.out.println( "i = " + i ) ; i++ ; } (f) Following code has some error(s). Rewrite the correct code underlining all the corrections made: int a = jtextfield.gettext( ) ; int b = 0 ; { a = a + b ; b - = 5 ; Page of 5

3 } while ( b >= 0 ) jtextfield.settext( a ) ; (g) The following GUI form is created in Netbeans for a Book Store where customers are given discount as follows: Book Type Discount % Magazine % General 3% CBSE 4% An additional discount of % is given if the total amount exceeds 999. i) What should be done so that only one of the radio button can be selected at a time ii) Write java code for Calculate Total button (calctotalbtn) which calculates total amount from pricetf and qtytf and display the total value in totaltf.(total amount=price*qty) 3 iii) Write java code for Calculate Discount % button (calcdiscperbtn) which determines the discount percentage as per the given criteria and display the discount percentage in the discpertf textfield. iv) Write java code for Calculate Net Amount button (calcnetamtbtn) which calculates the net amount by reducing the discount amount from total and display the net amount in the netamttf textfield. 5. (a) Differentiate between COMMIT and SAVEPOINT (b) Write the output of the following SQL statements : (i) Select Round(3.7589,); (ii) Select Concat( amit, jain ) FullName ; (iii)select Dayofyear( ); (iv) Select mid( Informatics Practices,3,5); (c) Write the SQL commands for the i) to iv) and write the output of the v) on the basis of tableclub. Table: CLUB COACH_ID COACHNAME AGE SPORTS DATOFAPP PAY SEX KUKREJA 35 KARATE 7/03/ M RAVINA 34 KARATE 0/0/ F 3 KARAN 34 SQUASH 9/0/ M 4 TARUN 33 BASKETBALL 0/0/ M 6 Page 3 of 5

4 5 ZUBIN 36 SWIMMING /0/ M 6 KETAKI 36 SWIMMING 4/0/ F 7 ANKITA 39 SQUASH 0/0/ F 8 ZAREEN 37 KARATE /0/ F 9 KUSH 4 SWIMMING 3/0/ M 0 SHAILYA 37 BASKETBALL 9/0/ M (i) To show all information about the swimming coaches in the club. (ii) To list names of all coaches with their date of appointment (DATOFAPP) in descending order. (iii) To display a report, showing coachname, pay, age and bonus (5% of pay) for all the coaches. (iv) To count the number of coaches in each sports. (v) Give the output of following SQL statements: (a) SELECT COUNT( DISTINCT SPORTS) FROM CLUB; (b) SELECT SUM(PAY) FROM CLUB WHERE DATOFAPP> 3/0/998 ; (c) SELECT LCASE(SPORTS) FROM CLUB; (d) SELECT AVG(AGE) FROM CLUB WHERE SEX= F ; 6. (a) Create table Employee as per following Table Instance Chart. Column EmpID EmpName EmpAdd EmpPhone EmpSal DeptID Name Key Type Primary Null/Unique Not Null Unique Data type Integer Char Char Integer Double Integer Length , (b) In a database there are two tables Customer and Bill as shown below: Table: Customer CustID CustName CustAdd CustPhone Akhilesh C4, JanakPuri, Delhi Purnima B, AshokVihar, Delhi Sumedha 33, South Ext., Delhi Table: Bill BillNo CustID BillAmt (i) How many rows and how many columns will be there in the Cartesian product of these two tables? (ii) Which column in the Bill table is the foreign key? Page 4 of 5

5 (c) Write SQL Commands for the statement (i) to (iv) and give outputs for SQL queries (v) to (viii). 6 TABLE: SENDER SenderID SenderName SenderAddress SenderCity ND0 R Jain,ABC Appts New Delhi MU0 H Sinha,Newtown Mumbai MU5 SJha 7/A,Park Street Mumbai ND50 T Prasad -K,SDA New Delhi TABLE: RECIPIENT RecID SenderID RecName RecAddress RecCity KO05 ND0 R Bajpayee 5,Central Avenue Kolkata ND08 MU0 S Mahajan 6,A Vihar New Delhi MU9 ND0 H Singh A,Andheri East Mumbai MU3 MU5 P K Swamy B5,C S.Terminus Mumbai ND48 ND50 S Tripathi 3,B D,MayurVihar New Delhi (i) To display the names of all senders from Mumbai (ii) To display the RecID, SenderName, SenderAddress, RecName, RecAddress for every recipient (iii)to display Recipient details in ascending order of RecName (iv) To display recipients details from the cities kolkata and Mumbai (v) Select DISTINCT SenderCity From Sender; (vi) Select A.SenderName, B.RecName From Sender A, Recipent B where A.SenderID = B.SenderID AND B.RecCity = Mumbai ; (vii) Select RecName, RecAddress from Recipient where RecCity NOT IN( Mumbai, Kolkata ); (viii) Select RecID,RecName From Recipient where SenderID = MU0 OR SenderID = ND50 ; 7. (a) Give Domain names of two most commonly used e-commerce websites? (b) What are the social impacts of e-governance? Write any positive and negative impacts. (c) Vineeth developing one application for Sales Department. He want to create some controls on a form for the following functions. Choose appropriate controls from Text field, Text Area, Label, radio button, check box, list box, combo box, button, Option pane, dialog box, menu items. S. No. Control used to Control. Select Customer name form list. Select type of sales (cash / credit) 3. Enter quantity and price 4. Calculation of total amount Page 5 of 5

KENDRIYA VIDYALAYA SANGATHAN CLASS XII BOARD EXAMINATION INFORMATICS PREACITES (065)

KENDRIYA VIDYALAYA SANGATHAN CLASS XII BOARD EXAMINATION INFORMATICS PREACITES (065) Time allowed: 3 hours Maximum Marks: 70 Instructions: (i) All questions are compulsory. (ii) Programming language :