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1 INFORMATICS PRACTICES (05) SAMPLE PAPER CLASS XII Time: 3HRS MM: 70 Q- Answer the following questions a) Name any two phone operating system(floss). b) What is a character encoding system? c) Mr. Rohan need to connect two computers for file sharing. Is it possible to do this without using a hub or router? d) Differentiate between true type font and open type font. e) Which of the following are open standards? ().OGG ().DOC (3).TTF (4).JPEG f) 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 in someone s computer in an unauthorized manner. g) Chanakya has to write a paragraph in English on nobel laureates as a part of his holiday homework. He is using a software in which he types in Hindi and the software automatically converts the text into English. For example, if he types न ब ल र ज़ स ग व न न गस स क त र ज़ the software converts it into Nobel Prize is given in six categories What kind of type of text entry is it phonetic text entry Or keymap based text entry? How is it different from the other kind of text entry? Q- a) Ms. Samhita has developed a java application through which the students of her school can view their marks by entering their admission number. The marks are displayed in various text fields. What should she do so that the students are able to view but not change their marks in text fields. b) What is inheritance? What are subclass and base class? c) What is method overloading in java? d) What will be the values of num and num after execution of the following code: int num, num=0; for(num=00;num<=0;num++) num=num+; --num; } e) Jennifer wants to write Html code to create an ordered list starting with c. Help her in writing the code. f) Write any two advantages of xml over html. g) Write java code that take any three digit number from the user in jtextfield, calculate the sum of the digits and display it in separate textfield named jtextfield. Q-3a) While creating a table Mobile data, Sujata forget to set primary key for the table. Write the statement to set the column Mobile number as the primary of the table. b) Abhi wants to undo the changes make during the transaction execution. What command should Abhi used for this purpose? a) Differentiate between DBMS and RDMS. b) What is wild character?

2 c) Mr. Ganesh wants to give moderation of 5 marks to all students those have below 35 marks. Name the command for this purpose. d) Rewrite the following SQL statement after correcting error(s). Underline the corrections made SELECT admno, class, max(marks) FROM STUDENT GROUP By class WHERE class>3; e) Differentiate between WHERE and HAVING clause? f) Name the SQL command used to: Remove all the records from the table and structure remaining intact. Q-4 a) Differentiate between compare To() and Equals () method. b) Carefully study the code given below : String message= Welcome to India, msg,msg; msg = substring(8); msg = substring(0, 7); What will be the contents of the variables msg and msg after the above statements are executed? c) Rewrite the following code using if.. else. switch(ch) case a : case A : case e : case E : case i : case I : case o : case o : case u : case U : ++v; break; default: others++; d) Give the output of the following statements. i. jtextfield.settext(( +00)+00); ii. jtextfield.settext( CBSE\nFinal\tTheory\tExam ); e) Given a String object named code having value as 908 stored in it. What will be the result of the following? JOptionPane.showMessageDialog(null, + (code.length() + Integer.parseInt(code))); f) Find output of the following Java code snippet: String word = Highrise ; String wordlc = word.tolowercase(); for(int i=0; i<wordlc.length(); i+=4) String extstr = wordlc.substring(i, i+); jtextarea.append(extstr + \n ); } g) Rewrite the following code using while loop: int a, b ; for(a=0, b=4; a<=; a++, b+=) jtextarea.append( + a++); } joptionpane.showmessagedialog(null, Finished!!! ); h) H_M Dry Clearner shop has computerized the billing system. The following data entry screen is used to generate bill. The criteria for calculation of washing and cleaning charges is as given below:-

Q-5 (a) Why is it not allowed to give string and data type arguments with SUM() and AVG() functions? Can we give these type of argument for other functions? (b) i.

SELECT DAYOFYEAR( 07-0-9 ); (c) Pranay, who is an Indian, created a table named Friends to store his friend s detail. Table Friends is shown below.

3 Q-5 (a) Why is it not allowed to give string and data type arguments with SUM() and AVG() functions? Can we give these type of argument for other functions? (b) i. SELECT CONCAT( India,NULL, LONDON ) ii. SELECT ROUND( , -); iii. SELECT SUBSTR( SWACHH BHARAT ABHIYAN, 7, ); iv. SELECT DAYOFYEAR( ); (c) Pranay, who is an Indian, created a table named Friends to store his friend s detail. Table Friends is shown below. Write commands in SQL for (i) to (iv) and output for (v) to (vii). Q-(a) i. To display list of all foreigner friends. ii. To list name, city and country in descending order of age. iii. To count how many friends have id on gmail. iv. To list name and city of those friends who don t have an id. v. Select name, country from friends where age> and name like A% ; vi. Select ucase(concat(name, *, city)) from friends where country like Denmark ; vii. Select mid(name,, 4) as UID from friends where country like USA ; Write SQL query to create a table bank_customer with the following structure: Field Type Constraint Acc_No Integer Primary key

Cust_Name Varchar(0) Not Null Cust_Add Varchar(0) Cust_City Varchar(0) b) In a Bank s database, there are two tables Customer_info and Transaction_Detail as shown below i.

c) Consider the tables Flights and Flares given below: With reference to these tables, write commands in SQL for (i) and (ii) and output for (iii) below: i) To display flight number, source, airlines

4 Cust_Name Varchar(0) Not Null Cust_Add Varchar(0) Cust_City Varchar(0) b) In a Bank s database, there are two tables Customer_info and Transaction_Detail as shown below i. Is it possible to have primary key and foreign key in one table? Justify your answer? ii. A table can have maximum how many primary keys and foreign keys? c) Consider the tables Flights and Flares given below: With reference to these tables, write commands in SQL for (i) and (ii) and output for (iii) below: i) To display flight number, source, airlines of those flights where fare is less than Rs ii) To count total no. of Indian Airlines flights starting from various cities. iii) SELECT FLIGHTS.FNO, NO_OF_FL, AIRLINES FROM FLIGHTS, FARES WHERE FLIGHTS.FNO = FARES.FNO AND SOURCE = DELHI ; Q-7 a) What do you mean by Informania? b) What is the role of a good back-end in an IT application? c) Identify e-governance and e-learning applications from the following. i. On-line experiments in a virtual laboratory of a college. ii. On-line application submission for change of address in the passport iii. On-line bill payment of Water Charges to Jal Board to any state

5 iv. On-line tutorials for Physics d) Raghuram is working as a manager in the Santushti Enterprises. He wants to create a form with following functions. Choose appropriate controls from Text Field, Label, Radio Button, Check Box and write in the third column: Sno Control used to Control Enter the name Select the department from the available list 3 Choose type of employee(regular/permanent) 4 Select hobbies of the employee

6 MARKING SCHEME A- a) Android smart and Symbian smart. b) The characters are stored in the computer as one or more bytes. All characters are stored in computers must be represented by numeric codes. Computer needs a way to translate the character set of your language s writing system into a sequence of s and 0s. This transformation is called Character encoding. The most popular types of character encoding are ASCII, EBCDIC and Unicode. c) Yes, she can connect two computers together using only one cable. A Ethernet cable used to connect computing devices together directly. In this setup, the data transmit pin of one cable is connected to the data receive pin of the other cable, and vice-versa. d) True Type Font is developed by Apple and licensed to Microsoft. It is 8 bit font which is compatible with Microsoft Windows and MACOS. Open Type Font is the extension of the True Type Font Format which is bits font and support 553 characters (Unicode characters) e) ().OGG (3).TTF f) i. Getting someone s login information by casually watching what he/she is typing. - Snooping ii. Setting up unauthorized parallel telephone lines. - Eavesdropping iii. Installing some software/hardware which captures the data while on its way. Eavesdropping iv. Reading the files in someone s computer in an unauthorized manner. - Snooping g) This is Phonetic Text Entry. In this words typed as their pronunciation in English script and later on converted to Corresponding language work. Keymap based Entry- In this method the keyboard keys are mapped to specific characters using a keymap. The whole arrangement of mapping the keyboard keys to specific language characters is known as keymap. A- a) Text fields should be made uneditable. By unselecting the editable check box. b) When one object inherit all the properties and behaviors of parent object is known as inheritance. The derived class inherits the states and behaviors from the base class. The derived class is also called subclass. c) When two or more methods in the same class have the exact same name but different parameters called Method overloading. The round() method and substring() method are the example of method overloading. d) num = 0 num = 0 e) <OL type= a start=3> :::: </ol> f). XML can create its own tags.. XML can store and transport data. g) public void jbutton.actionperformed(.) int num = Integer.parseInt(jTextField.getText( )); int r, sum=0; while(num>0) r = num%0;

7 } sum += r; num = num / 0; A-3a) Alter table MobileData Add Primary key (MobileNo) ; b) ROLLBACK c) Database Management System is a computer software application which manage the database create, store, retrieve and update data. Relational Database Management system is a program that manage and administer relational database. d) % and _ are two wild characters with like operator for pattern matching. % is used for any number of characters and _ is used for exact number of characters. e) Update Students set marks = marks + 5 where marks<35; f) SELECT admno, class, max(marks) FROM STUDENT WHERE class>3 GROUP By class; g) Where clause is used to SELECT particular rows that satisfy condition whereas having clause is used in connection with aggregate function, group by clause. h) Delete all from table name; A-4 a) CompareTo method returns true if both strings are equal otherwise returns false. Equals() method returns 0 if both strings are equal otherwise returns a non-zero value. For example: if(sname.equals( Aryan )) jtextfield.settext( Very Good ); else jtextfield.settext( Good ); if(sname.compareto( Aryan )==0) jtextfield.settext( Very Good ); else jtextfield.settext( Good ); b) To India Welcome c) if(ch== A ch== a ch== E ch== e ch== I ch== i ch== O ch== o ch== U ch== u ) ++v; else others++; d) i ii CBSE Final Theory Exam e) 9 f) hi ri g) int a, b ; a=0, b=4; while(a<=) jtextarea.append( + a++); a++, b+=; } joptionpane.showmessagedialog(null, Finished!!! );

h) System.exit(0); jtextfield.settext( ); jtextfield.settext( ); jtextfield3.settext( ); jtextfield4.settext( ); jtextfield5.settext( ); jtextfield.settext( ); Q-5 (a) The argument of AVG() and SUM() functions are of numeric (int/decimal) type only.

8 h) System.exit(0); jtextfield.settext( ); jtextfield.settext( ); jtextfield3.settext( ); jtextfield4.settext( ); jtextfield5.settext( ); jtextfield.settext( ); Q-5 (a) The argument of AVG() and SUM() functions are of numeric (int/decimal) type only. So they are not allowed to give string and date type argments. (b) i. NULL ii. 500 iii. BHARA iv. 50 (c) i. Select * from Friends where Country <> India ; ii. Select name, city, country from Friends order by age; iii. Select count(*) from Friends where _id like %gmail% ; iv. Select name, city from Friends where _id is null; v. Name Country Alice 4 Angel Alexander 5 vi. ucase(concat(name, *, city)) CHARLES*COPENHAGEN JETTE*NYKOBING

9 vii. mid(name,, 4) Alic Ange Q-(a) Create table bank_customer (Acc_No int(5) primary key, Cust_Name varchar(0) not null, Cust_Add varchar(0), Cust_City varchar(0) ); b) i. Yes it is possible to have primary key and foreign key in one table. Primary key uniquely identify the records of a table and Foreign key is used to relate two or more tables. ii. A table can have only primary key and any number of foreign keys. c) i) Select Fno, source, airlines from flights, fares where fare <0000 and Flights.Fno = Fares.Fno; ii) Select count(distinct source) from flights, fares where airlines = Indian Airlines and Flights.Fno = Fares.Fno; iii) FNO NO_OF_FL AIRLINES MC0 Deccan Airlines MU499 3 Sahara A-7a) Infomania is an irresistible desire to keep a check or gather news or information via electronic media such as , SMS, MMS etc. b) What is the role of a good back-end in an IT application? c) Identify e-governance and e-learning applications from the following. i. On-line experiments in a virtual laboratory of a college. e-learning ii. On-line application submission for change of address in the passport e- Governanace iii. On-line bill payment of Water Charges to Jal Board to any state e- Governance iv. On-line tutorials for Physics e-learning d) Sno Control used to Control Enter the name Text box Select the department from the available list Combo box 3 Choose type of employee(regular/permanent) Radio button 4 Select hobbies of the employee Check box

Downloaded from Sample Paper Grade XII Informatics Practices (Code: 065)

Downloaded from Sample Paper Grade XII Informatics Practices (Code: 065) Sample Paper Grade XII Informatics Practices (Code: 065) 2014-15 Time: 3Hrs. MM: 70 1 (a) Draw a network layout of bus topology to connect 5 client computers and 1 server computer. Mr. John wants to prevent