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

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1 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 : Java, SQL. 1. (a) Jayant transferred one file to one remote host at head office. Which protocol is 1 used for this purpose. (b) Which device is used to convert digital signals to analog and analog signals to 1 digital signals. (c) Which channel is used to carry information or data from one point to another. 1 (d) Kamal wants to connect his computer with the LAN but he is unable to connect it. 1 Suggest him the device which he will fix in his computer so that he will be able to connect LAN cable with his computer. (e) What is a MAC address? Write its example. 2 (f) Define the following. 2 (i) Node (ii) Bps (g) What is meant by network topology? Write the name of any 4 topologies (a) Heena wants to display two radio buttons for male and female, such that if any of 1 them is selected, the other gets deselected automatically. What would you suggest her to do? (b) How one can make a JButton disabled so that it cannot be clicked? Write 1 example. (c) Which HTML tag is required to display text in Bold. Give one example. 1 (d) What is root element in XML? 1 (e) What will be the value of i and j after the execution of the following code: 2 int i = 2, j = 6 ;

2 for ( int n = 1 ; n <= 5 ; n++ ) { i++ ; j-- ; } (f) Explain the difference between empty element and container element in HTML. 2 Also give example. (g) Write code in java that takes two Strings from textfields t1 and t2 and display them 2 joined together in a third textfield t3. 3. (a) Which command is used for partial ROLLBACK in MYSQL? 1 (b) Which statement will be used adding a new column age of integer type size is 4 in 2 ELECTION table. (c) Differentiate between DDL and DML commands. 2 (d) What is the purpose of following SQL query? 1 SELECT COUNT(ENO) FROM ELECTION GROUP BY PARTY; (e) The ELECTION table has the following fields: ENO, ENAME, AGE, PLACE and 1 PARTY. Details of 15 candidates are entered in the table. What is its cardinality and degree? (f) Find out is the error(s) in this MySQL query 1 SELECT * FROM ELECTION WHERE PLACE = NULL; (g) The ENAME column of the table ELECTION as shown below. 2 ENAME GIRISH AKSHAY RAJESH SHAKSHI TARANG DINESH Based on the above 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) What is the difference between public and private access specifier in a java class? 1 (b) Write java code to display Input Dialog to get the name of the user and store in a 1 String variable str.

3 (c) What will be displayed in jtextfield1 after executing the following statement: 1 jtextfield1.settext( "Hello".subString( 2 ).length( ) + "" ) ; (d) What will be displayed in jtextfield1 and jtextfield2 after the following code is 2 executed: int i = 5 ; for ( int j = 1 ; j <= i ; j++ ) if ( j % 2 == 0 ) jtextfield1.settext( j + " " ) ; else jtextfield2.settext( j + " " ) ; (e) Rewrite the following code using for loop: 2 int i = 1 ; while( i < 5 ) { System.out.println( "i = " + i ) ; i++ ; } (f) Following code has some error(s). Rewrite the correct code underlining all the 2 corrections made: int a = jtextfield1.gettext( ) ; int b = 20 ; { a = a + b ; b -= 5 ; } while ( b >= 0 ) jtextfield1.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 2% General 3% CBSE 4% An additional discount of 2% is given if the total amount exceeds 1999.(refer GUI diagram) Now answer the following:

1 3 i) Write java code for Calculate Total button (calctotalbtn) which calculates total amount from pricetf and qtytf and display the total value in totaltf.

4 1 3 i) Write java code for Calculate Total button (calctotalbtn) which calculates total amount from pricetf and qtytf and display the total value in totaltf. 2 ii) 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. iii) 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 2 (b) Write the output of the following SQL statements: 2 (i) Select Round (124.44) + Pow(4,2) ; (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 6 of tableclub. Table: CLUB COAC COACHN AGE SPORTS DATOFAPP PAY SEX H_ID AME 1 KUKREJA 35 KARATE 27/03/ M 2 RAVINA 34 KARATE 20/01/ F 3 KARAN 34 SQUASH 19/02/ M 4 TARUN 33 BASKETBALL 01/01/ M 5 ZUBIN 36 SWIMMING 12/01/ M 6 KETAKI 36 SWIMMING 24/02/ F 7 ANKITA 39 SQUASH 20/02/ F 8 ZAREEN 37 KARATE 22/02/ F 9 KUSH 41 SWIMMING 13/01/ M 10 SHAILYA 37 BASKETBALL 19/02/ 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.

5 (iii) To display a report, showing coachname, pay, age and bonus (15% 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> 31/01/1998 ; (c) SELECT LCASE (SPORTS) FROM CLUB; (d) SELECT MOD (AGE,5) FROM CLUB WHERE SEX= F ; 6. (a) Create table Employee as per following Table Instance Chart. 2 Column EmpID EmpNa EmpAdd EmpPho EmpSal DeptID Name me ne Key Primary Foreign Type Null/Uniq Not Null Unique ue Foreign Key Departm ent Table Name Foreign DeptID Key Column Data Integer Char Char Integer Double Integer type Length ,2 2 (b) In a database there are two tables Customer and Bill as shown below: 2 Table: Customer CustID CustName CustAdd CustPhone 1 Akhilesh C4, JanakPuri, Delhi Purnima B1, 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

6 product of these two tables? (ii) Which column in the Bill table is the foreign key? (c) Write SQL Commands for the statement (i) to (iv) and give outputs for SQL 6 queries(v) to (viii). TABLE: SENDER SenderID SenderNam SenderAddress SenderCity e ND01 R Jain 2,ABC Appts New Delhi MU02 H Sinha 12,Newtown Mumbai MU15 SJha 27/A,Park Street Mumbai ND50 T Prasad 122-K,SDA New Delhi TABLE: RECIPIENT RecID SenderID RecName RecAddress RecCity KO05 ND01 R Bajpayee 5,Central Avenue Kolkata ND08 MU02 S Mahajan 116,A Vihar New Delhi MU19 ND01 H Singh 2A,Andheri East Mumbai MU32 MU15 P K Swamy B5,C S.Terminus Mumbai ND48 ND50 S Tripathi 13,B1 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 number of Recipients from each city (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 = MU02 OR SenderID = ND50 ; 7. (a) Which technique we use the determine the requirement of tables in a database 1 and their attributes and relationship. (b) What are the social impacts of e-governance? Write any 2 positive and 2 negative 2 impacts. (c) Manoj is developing one application for accounting purpose. He want to create 2

7 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. Control used to No. 1. Select Dr/Cr 2. Enter particulars 3. Enter party or item name 4. Clear all entries control

KENDRIYA VIDYALAYA SANGATHAN ERNAKULAM REGION FIRST PRE-BOARD EXAMINATION

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