KENDRIYA VIDYALAYA SANGATHAN CLASS XII EXAMINATION INFORMATICS PRACTICES (065)
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1 KENDRIYA VIDYALAYA SANGATHAN CLASS XII EXAMINATION INFORMATICS PRACTICES (065) Time Allowed: 3 Hours Maximum Marks: 70 Instructions: (i) All questions are compulsory. (ii) Programming Language: Java, SQL (iii) Answer the questions after carefully reading the text. 1. (a) Which protocol is used to translate domain names to associated IP address? 1 (b) Pranay has a Hub in his office to connect all the computers but speed is slow due to 1 collision suggest any other device for this purpose so the speed can be increased. (c) Write the name used to refer the difference between the highest and lowest 1 frequencies of a transmission channel. (d) Write the name of the computer which takes the services from other computer. 1 (e) Why do we use repeater in a network? 2 (f) How is Coaxial cable different from Optical Fiber? 2 (g) Compare freeware and shareware software (a) Shyam has taken a list control on his form to display the list of all items available in 1 his shop. But he wants to allow the user to select multiple items from his list control. Which property of JList should he use to do the same? (b) Which method of JFrame is used to close the frame without closing the application. 1 (c) Which HTML tag is used to break the current line in HTML? 1 (d) Is the following XML code valid? Justify your answer. 1 <student-list> <student> <rollno> 123 </rollno> <name> Ambika </name> <student-list>
2 (e) What will be the values of m and n after the following java code is executed: 2 int m = 10, n = 20 ; if ( m!= n ) m = n + 1 ; else m += 2 ; m++ ; n++ ; (f) Write any two differences between <HR> tag and <H1> tag in HTML? 2 (g) Write java code that gets marks in two subjects from textfields m1tf and m2tf 2 and displays the higher marks in a textfield named hightf. 3. (a) Ramesh has created a table SUPPLIER in a database. One of the columns in the 1 table is City. Which keyword is used to display only unique City names from table? (b) Sunil decides to delete Age column from a MySQL Table (STUDENT) after 2 inserting some data into the table. Write the command to delete that particular column in student table. (c) Reshma, a student of class XII has created a table PARTICIPANTS(PNO, NAME, 2 CITY, CLAS ). She wants to find out the names of participants who are not from Mumbai, Delhi and Ahmedabad. She tried the following: SELECT NAME FROM PARTICIPANTS WHERE CITY HAS NOT Mumbai, Delhi, Ahmedabad; Find out the errors and rewrite the above query after correction. (d) Ram is not able to repeat a name in the NAME field of the STUDENT table. What 1 is the constraint he has used to achieve this? (e) What is the Cardinality and Degree in MySQL. 1 (f) How is a DELETE command different from DROP command? 1
3 (g) Find out the output based on the STUDENT table given below: 2 STREAM AVGMARK GRADE MEDICAL 78.5 B COMMERCE 89.2 A HUMANITIES 64.4 B NONMEDICAL 92.0 A COMMERECE 67.5 C (I) (II) SELECT ROUND(AVGMARK) FROM student WHERE GRADE= B ; SELECT RIGHT(STREAM,2) FROM student; 4. (a) What is a package in java? Which package is imported for jdbc coding in java? 1 (b) Write any one difference between an abstract class and a simple class. 1 (c) What will be displayed in jtextfield1 after executing the following statement: 1 String str = "" ; for( int i = 1 ; i <= 5 ; i++ ) str = str + i ; jtextfield1.settext( str ) ; (d) What will be displayed in jtextfield1 and jtextfield2 after the following code is 2 executed: int a = 12, b = 20 ; jtextfield1.settext( a + b + " " ) ; jtextfield1.settext( " " + a + b ) ; (e) Rewrite the following code using if-else: 2 boolean flag = Boolean.parseBoolean( boltf.gettext( ) ) ; switch ( flag ) { case true : System.out.println( "true" ) ; break ; case false: System.out.println( "false" ) ; }
4 (f) Following code has some error(s). Rewrite the correct code underlining all the 2 corrections made: String str1 = Pranay ; int b = 9 ; for( b = 0, b < 3, b++ ) system.out.println( str1 ) ; str1 = str1 + b ; } (g) Mr. Lal is designing the GUI for managing customer details. The GUI designed in Netbeans is as follows: Answer the following: i) Mr. Lal wants that when the form is run, it should display the details of first customer in the form from the customer database. Which event he should handle to write the java code to do the above? ii) Write java code to fetch the first record from the table CUST(CID, CNAME, CADDR) in the database CUSTOMER and display the data values in the textfield cidtf, cnametf and address in the textarea caddrta iii) Write java code to exit from the application, when the exitbtn is clicked. 5. (a) Discuss the role of Foreign Key Constraints in MYSQL table. 2 (b) Write the output of the following SQL queries: 2 (i) SELECT ROUND( , 2 ) ; (ii) SELECT DAYOFMONTH( ) ; (iii) SELECT TRUNCATE( , 2 ) ; (iv) SELECT SUBSTRING( KVSANGATHAN, 3, 3 ) ;
5 (c) Write the SQL commands for the (i) to (iv) and write the output of the (v) and (vi) 6 on the basis of table TEACHER given below: No Name Age Department Dateofadm Salary Sex 1 Jugal 34 Computer 10/01/ M 2 Sharmila 31 History 24/03/ F 3 Sandeep 32 Maths 12/12/ M 4 Sangeeta 35 History 01/07/ F 5 Rakesh 42 Maths 05/09/ M 6 Shyam 50 History 37/06/ M 7 Shivam 44 Computer 25/02/ M 8 Shalakha 33 Maths 31/07/ F (i) (ii) (iii) (iv) (v) (vi) To show all information about the teacher of History department. To display the list of all male teachers who are in Maths department. To display names, Age and Sex of all teachers with their date of admission in descending order. To insert a new row in the TEACHER table with the following data: 9, Raja, 26, Computer, {13/05/95}, 23000, M Select COUNT(DISTINCT department) from TEACHER; Select MIN(Age) from TEACHER where SEX= F ; 6. (a) Create table Customer as per following Table Instance Chart. 2 Column Name Cust_ID Cust_Name Cust_Add Pincode Cust_Phone DataType Integer Varchar Varchar Integer VARCHAR Length Constraint Primary Not Null
6 (b) In a database there are two tables Student and Stream as below : 2 Table: Student Sid Sname age StrId 1 Roondy Joseph Trinchu Prithlon Ahol 10 2 StrId Table: Stream Name 1 Eng 2 Com 3 Sci 4 Hum (i) What is the cardinality and degree of both tables? (ii) Among both the tables which table has the foreign key and write the foreign key name. (c) Consider the following tables Product and Client. Write MySQL commands for the 6 statement (i) to (iv) and give outputs for SQL queries (v) to (viii). Table : Book Book_Id Book_Name Author_Name Publisher Price Type Quantity C0001 Fast Cook Lata Kapoor EPB 355 Cookery 5 F0001 The Tears William Hopkins First Pub 650 Fiction 20 T0001 My First C++ Brain & Brooke EPB 350 Text 10 C++ Brain T0002 works A.W. Rossaine TDH 350 Text 15 F0002 Thunderbolts Anna Roberts First Pub 750 Fiction 50 Table : Issued Book_Id Quantity_Issued T C F0001 2
7 (i) To show Book id, Book name, Author name and price of books of First Pub Publisher (ii) To display the names and price of books in ascending order of their prices. (iii) To increase the price of all books of EPB publishers by 50. (iv) To display the Book_Id, Book_Name and quantity issued for all books which have been issued. (v) Give the output of the following (a) Select Count(*) from Book; (b) Select Max(Price) from Book where Quantity >=15 ; (c) Select Book_Name, Author_Name from Book where Publisher= First Pub ; (d) Select count(distinct Publisher) from Book where Price>=400; 7. (a) What is an interface? 1 (b) Define a front-end of an information system. 2 (c) Vineeth is developing one application for Sales Department. He wants to create 2 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 Customer name form list 2. Select type of sales (cash / credit) 3. Enter quantity and price 4. Calculation of total amount Control
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