KENDRIYA VIDYALAYA NO 1 AFS JALAHALLI (WEST) PRE BOARD INFORMATICS PRACTICE Class XII

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1 MM: 70 KENDRIYA VIDYALAYA NO AFS JALAHALLI (WEST) PRE BOARD- 0 INFORMATICS PRACTICE Class XII TIME: 3:00 HRS Note: There are 7 Questions and all questions are compulsory. Q. a) Abir wants to establish a LAN in his software development lab. Which topology is best suited for this purpose? b) Which network device ensures the successful delivery of data packets over a geographically distributed network? c) Name the network threat through which some intruder secretly listens to the private communication between two parties over an in-secured channel without actually hacking into the network. d) What do you understand by phonetic fonts? e) Infotech Bangalore has to setup a network to connect four of its buildings with the following details: B A 90PC 00PC 4 C 55PC D 70PC Distance between A and B: 40m Distance between A and C: 80m Distance between A and D: 0m Distance between B and C: 75m Distance between B and D: 0m Distance between C and D: 50m i) Suggest the building where the Server should be placed ii) Suggest the cable layout between the buildings so that the building with the server is connected to every other building. iii) Suggest the placement of Switch/Hub and Repeaters in the setup with justification. iv) Infotech has a computerized office at Mysore. Suggest the type of wired communication link needed to be established in order to achieve networking between the two offices. f) Categorise the following as Open Source OS, RDBMS, programming languge and web related software: i) Apache ii) Linux iii) MySQL iv) Python Q. a) Bhanu wants to disable some of the jtextfields during runtime. Suggest him the suitable method to achieve his goals.

2 b) Write one word answer for the following: i) Which java keyword is used to skip the remaining portion of a loop and start a new iteration? ii) Which property is set during design time to assign an access key to a jbutton? c) Locate the errors in the following code fragment and re-write the code with underlined corrections : integer num=0,i=; long sum=0; do(i<num) { sum=+i; i+=i; } d) What will be the output of the following code fragment: int num=34; int res=0; while(num>0) { int r = num%0; res=res*0+r; num/=0; } lblres.settext( The result is: + res); e) Write a Java function checkeven() that accepts an integer as parameter and returns true if the number is an even number, otherwise returns false. f) What is the need of jbuttongroup in a Swing Application? Q.3 a) What is a Class in connection with Object Oriented Programming? b) Write one word for the following: i) A method that passes parameters to base class constructors? ii) A keyword that makes a variable to have single copy in the memory? c) Write the use of the HTML tags <ol>, <img>, <br> and <form> d) Write two important features of XML. e) What will be the output of the following Java statement: String myname= VANUPRATAP ; lblres.settext(myname.substring(,8)); f) How is domain name resolved in to IP address?

g) Raymond International School has the following interface: 5 Controls Name Use jtextfield txtname Student Name txtvvn VVN fees txtcfee Computer Fee jradiobutton btnsr Sr Secondary jradiobutton

3 g) Raymond International School has the following interface: 5 Controls Name Use jtextfield txtname Student Name txtvvn VVN fees txtcfee Computer Fee jradiobutton btnsr Sr Secondary jradiobutton btnse Secondary jradiobutton btnpr Primary jbutton btnfee Get Fees BtnClr Clear. When the Get fee button is clicked the tuition fee is obtained as 300 for Sr Secondary, 00 for Secondary and 00 for Primary depending upon the selected Radio button. The total fee is calculated as the sum of Tution Fee, VVN and Computer Fee. The name along with the total fee is displayed in a joptionpane. (3). When the clear button is clicked the all the jtextfield are cleared of its contents. The Sr Secondary Radio buton is selected and the focus is in the Name field. () Write codes under the ActionEvent on the two jbuttons. Q.4 a) What is the role of COMMIT command in SQL? b) How is Degree different from Cardinality? c) Write one word for the following: i) An SQL command used to remove duplicate tuples from a SELECT query. ii) The type of SQL query that makes changes in the design of an existing table.

4 d) Predict the output of the following SQL queries: a) SELECT SUBSTR( MONALISA, -5, ) b) SELECT ROUND(0.6, ) e) Write any four constraints that are used in MYSQL. f) Write two important features of MySQL database. Q.5 a) Write queries based on the following Table: Table: EMP Column name Data type Limit Constraint EMPNO Integer 4 digits Not Null ENAME Varchar 5 characters Not Null GENDER Char Default M DOB Date Not Null DEPTNO Integer Default 0 SAL Numeric 4 digits Null allowed Primary Key is EMPNO 0 Sample Data in Student Table: EMPNO ENAME GENDER DOB DEPTNO SAL 00 RAVI M AMAR M SUJA F RUMA F SIJU M ARUNA F HYDER M RAINA M a) Write SQL query to create the EMP Table. () b) Write SQL query to increase the size of ENAME column to hold 30 characters. () c) Write SQL query to insert a row in the table. () d) Write SQL query to increase the SAL of all the female employees by 00. () e) Write SQL query to delete the entry for empno 006 from the table. () f) Display ENAME, GENDER, DOB for all the employees who are not working in the deptno 0, or 3. (). g) Display the ENAME, GENDER and SAL of employees who are employed in the year 005. ()

5 Q.6 a) Predict the output based on the following table Student: Rollno Name Dob Class Gender Hobby Fees 00 AMAR M Painting MANI F Drama RAMA F Cooking SHAMA F Cooking KAJOL F Sports BUNTY M Drama AKBAR M Sports TONY M Sports JEETU M Painting BHAWNA F Cooking 0 5 i) SELECT MAX(Class), Hobby from Student GROUP BY Hobby; ii) SELECT COUNT(name), Gender FROM Student GROUP BY gender HAVING gender<> F ; iii) SELECT Name, class FROM Album WHERE class >7; iv) SELECT name, dob, gender from Student WHERE Hobby= Painting ORDER BY Name DESC; v) SELECT MIN(fees) FROM student; c) Study the following tables and answer the queries: Table: Guide SUBJECT # ADVISOR PHYS VINOD COMP ALOK CHEM RAJAN MATH MANJU HIST SMITA Table: Student ID # NAME FEES SUBJECT MARK DIV KARAN 400 PHYS 68 DIVAKAR 450 COMP 68 3 DIVYA 00 CHEM 6 4 ARUN 350 PHYS 63 5 SABINA 500 MATH JOHN 400 CHEM 55 7 ROBERT 50 PHYS 64 8 RUBINA 450 MATH VIKAS 600 COMP 6 0 MOHAN 300 MATH 57 5 i) Display the Name, Subject, Advisor all those students whose advisor is ALOK () ii) Display the ID, Name, Subject, Marks for those students whose marks are between 68 to 70. ()

6 iii) Which is the foreign key in the given set of relation? () Q.7 a) Enlist two websites that provide e-learning Solutions. b) Write two importance of e-business in the Society c) Sushma wants to create a Swing based application by using the controls jlabel, jradiobutton, jtextfield, jcombobox, jtextarea and jbutton. Help him in selecting the appropriate control for the following requirements: i) To enter multiline text. ii) To choose between male and female iii) To select months from a set of months iv) To submit the form.

Kendriya Vidyalaya Sangathan (Chandigarh Region) Blue Print of Question Paper Class: XI Subject: Informatics Practices Session

Kendriya Vidyalaya Sangathan (Chandigarh Region) Blue Print of Question Paper Class: XI Subject: Informatics Practices Session 2017-18 S.No. Unit Very Short Answer Short Answer-I Short Answer-II Long Answer