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INFORMATICS PRACTICES (CLASS XI) TIME : 3:00 HRS MM : 70 Q a What is Bluetooth? b What is the function of an OCR? c What are non-impact printers? d Write two characteristics of Random Access Memory.

1 INFORMATICS PRACTICES (CLASS XI) TIME : 3:00 HRS MM : 70 Q a What is Bluetooth? b What is the function of an OCR? c What are non-impact printers? d Write two characteristics of Random Access Memory. e How Multi Processing Operating Systems is different from Multi Programming Operating Systems? f Write a short note on Firewall. g What is an Assembler? Q a Paradise Park uses the following interface to generate bill for its customers. 4 The controls used in the above interface are as follows : Control Type Control Name Functionality jtextfield txtname Customer Name jtextfield txtage Customer Age jcheckbox chkjr Joy Ride jcheckbox chkjr Joy Ride jtextarea txtres Bill Area jbutton btnbill To generate Bill When the bill button is clicked the bill is displayed as shown in the interface above. The functionality is as follows :

2 Rate for Joy Ride is 00 and that of Joy Ride is 00. A customer can select one or both the Joy Rides. The total is calculated as the sum of one or both joy rides cost. A discount of Rs. 50 is given on total if the child is below years. Write code under the action event of the the jbutton to achieve the above functionality. b Explain how java codes are compiled and run. c What will be the output of the following code segments : int a=5, b=0, c=9, d=8; System.out.println( + ((a++)+(++c)-(--b)+(d--)); System.out.println( +( (a>b)?((c>d)?(++d):35):(--b) ) ); d Convert the following code segment using switch-case construct : int num = Integer.parseInt(txtNum.getText()); if(num>= && num<=5) txtres.settext( Prime ); else if(num == 6 num == 8 num == 0) txtres.settext( Even ); else txtres.settxt( Not Valid ); Q3 a Predict the output of the following java construct : int m = 5; int prod = ; int i = ; while(i<=5) prod = prod + prod * (m%); --m; ++i; System.out.println( + prod); b What is the difference between an ordinary Compilation and Java Compilation?

c Design an application having an interface like : 4 Implement functionality by writing methods with passing the argument of three textboxes in calcsum(), calcavg() and calcmax().

3 c Design an application having an interface like : 4 Implement functionality by writing methods with passing the argument of three textboxes in calcsum(), calcavg() and calcmax(). d What are the actual and formal parameters? Give example to support your answer. e Explain the use of comments in Java with example. f Explain two circumstances where run time errors may occur in a java program. g Write two characteristics of a good program. Q4 a Write a short note on : i) MySQL Features *3 ii) Referential Integrity iii) Database Constraint b What is NULL? What happens when you perform arithmetic calculations on NULL values? c Enlist the various types of queries available with DDL and DML. Q5 a Explain the difference between ROUND and TRUNCATE functions in MySQL with examples. b Given the following table structure and sample data : Table Name : SARAGAM 4 Field Name Data Type Data Limit Constraints Albumid Numeric 4 Primary Key Album Text 0 NOT NULL Cost Numeric 3 Default 0 Quantity Numeric 3 Greater than 0 Singer Text 0

4 Sample Data : Albumid Album Cost Quantity Singer 00 SAHER 50 4 JAGIT 00 MADHUSHALA 50 6 MANNA 003 IBADAT 80 8 RAFI 004 KISMAT 80 6 RAFI 005 HALCHAL 00 4 KISHORE 006 BLACK 0 0 MICHEL 007 PASSION 00 5 SHAKIRA 008 NAMESAKE 90 3 MADONA 009 PLASURE 0 ASHA 00 CATWALK 55 7 MADONA Write the following queries : i) Write SQL syntax to create the table. The table does not support Foreign Keys. ii) Add a column RATING in the above containing numeric data and should accept NULL values. iii) Insert one row values in the table iv) Increase the cost of all the albums sung by RAFI by 50. v) Display cost of all those albums whose singer name ends with A. vi) Display the album details for either RAFI, KISHORE or ASHA. vii) Display the album details in the ascending order of their quantity. c What will be the output of the following SQL statements : i) SELECT RIGHT(MID( MAHARAJA MAHAYOGI,,5),4); ii) SELECT LEFT(SUBSTR( AARAHANAPAHARAN, -0,5),); 4 Q6 a How e-governance has benefitted the common man? b What benefits does e-business offer to a customer? c Enlist websites that provides e-learning platforms.

5 INFORMATICS PRACTICES (CLASS XI)-MARKING SCHEME TIME : 3:00 HRS MM : 70 Q A Bluetooth is telecommunications industry specification that describes how mobile phones, computers and PDAs can be easily interconnected using a short range wireless connection. b OCR is used to read character of special type font printed on a conventional paper with conventional ink. It is an input device. c In these printers there is no mechanical contact between the printer head and d e the paper.. It is a volatile memory and its contents are lost when power is switched off.. We can read as well write in this memory. Multi Programming Operating Systems It supports multiprogramming i.e. more than one user can be supported by it. Therefore more than one programs are loaded and active in main store at the same time. Multi Processing Operating Systems It is capable of handling more than one processor as the jobs have to be executed on ore than one CPU. It is capable of loadsharing. f Firewall is a technique used to secure computer systems or network to block unauthorized access and allow only the authorized users. Firewall can be implemented as hardware or software or both. g Assembler is a language processor. It translates a program written in assembly language to machine language. Q A String str = txtname.gettext(); int age = Integer.parseint(txtage.getText()); int bill=0; if(chkjr.isselected()) bill+=00; if(chkjr.isselected()) bill+=00; if(age<) bill-=50; txtres.append( \nage : +age); txtres.append( \nbill : +bill); 4 b mark for correct input stmt mark for correct if- else stmt mark for correct output stmt Java compiler produces bytecode, which is a machine instruction code for a java processor chip called Java Virtual Machine. This bytecod is platform independent.

6 c int a=5, b=0, c=9, d=8; System.out.println( + ((a++)+(++c)-(--b)+(d--)); Output = 4 (right to left) System.out.println( + ( (a>b)? ((c>d)?(++d):35) : (--b) ) ); Output = 8 d Convert the following code segment using switch-case construct : int num = Integer.parseInt(txtNum.getText()); switch(num) case : case 3 : case 4 : case 5 : txtres.settext( Prime ); break; case 6 : case 8 : case 0 : txtres.settext( Even ); break; default : txtres.settxt( Not Valid ); Q3 a Predict the output of the following java construct : Output = 8 b Ordinary Method It is a collection of Java statement Can have any valid return type, even void also Any name except class name Constructor It creates an object of the class Has no return type, not even void Same name as the class name c int calcsum (int N, int N, int N3) return (N+N+N3); 4 float calcavg (int N, int N, int N3) return (float)(n+n+n3);

7 d int calcmax (int N, int N, int N3) return ( (N>N? (N>N3? N : N3)? (N>N3?N : N3 ); marks each for writing correct method mark for finding greatest between N, N and N3 Actual Paratmeters are those parameters which appear in the method call statement. Formal parameters are those parameters which appear in the method definition. int Marks(int x, int y) //formal parameters return(x+y); int a=, b=3; int c=marks(a,b); // actual parameters mark for correct definition mark for correct example e Comments are used to provide internal documentation. They are given by // or /*.*/ int Marks(int x, int y) //formal parameters return(x+y); /* int a=, b=3; int c=marks(a,b); // actual parameters */ mark for correct definition mark for correct example f Divide by zero when we try to divide a number by 0 When we try to calculate square root of a negative number g. Program should be user friendly. The user should not concern about what is happening inside the code.. The program should be portable i.e. should be run on different platforms. Q4 a Write a short note on : i) MySQL Features Any 4 features such as cost, query language support, portability, speed, ease of use, security etc. ii) Referential Integrity It is a database concept, which states that table relationships 6

8 B must always be consistent. In other words, any foreign key field must agree with the primary key that is referenced by the foreign key. Or any other relevant definition. iii) Database Constraints Constraint are the rules used to specify for the data in a table. These are the rules enforced on data columns in a table. Types of constraints Primary Key, NOT NULL, Default, Check, Unique What is NULL? - NULL is used to represent missing values. A NULL value in a table is the value in the field that is blank. What happens when you perform arithmetic calculations on NULL values. Arithmetic operations on a column that has NULL values, is also NULL. c DDL create, alter, drop DML select, insert, update, delete Q5 a ROUND(X,D) return X rounded to D decimal places. ROUND(5.98,) = 5.3 TRUNCATE(X,D) number is truncated to D digits after decimal places. TRUNCATE(5.98,) = 5. b Given the following table structure and sample data : 4 Table Name : SARAGAM Field Name Data Type Data Limit Constraints Albumid Numeric 4 Primary Key Album Text 0 NOT NULL Cost Numeric 3 Default 0 Quantity Numeric 3 Greater than 0 Singer Text 0 Sample Data : Albumid Album Cost Quantity Singer 00 SAHER 50 4 JAGIT 00 MADHUSHALA 50 6 MANNA 003 IBADAT 80 8 RAFI 004 KISMAT 80 6 RAFI 005 HALCHAL 00 4 KISHORE 006 BLACK 0 0 MICHEL 007 PASSION 00 5 SHAKIRA 008 NAMESAKE 90 3 MADONA

9 009 PLASURE 0 ASHA 00 CATWALK 55 7 MADONA Write the following queries : i) Write SQL syntax to create the table. The table does not support Foreign Keys. Create table SARAGAM ( Albumid int(4) Primary Key, Album varchar(0) NOT NULL, Cost int(3) default 0, Quantity int(3) check (Quantity >0), Singer varchar(0) ); ii) Add a column RATING in the above containing numeric data and should accept NULL values. Alter table SARAGAM add (rating int(3)); iii) Insert one row values in the table insert into SARAGAM values (0, Mirza,300,3, Jagjit ); iv) Increase the cost of all the albums sung by RAFI by 50. Update SARAGAM set cost = cost + 50 where singer = RAFI ; v) Display cost of all those albums whose singer name ends with A. Select cost from SARAGAM where singer like %A ; vi) Display the album details for either RAFI, KISHORE or ASHA. Select * from SARAGAM where singer in( RAFI, KISHORE, ASHA ); vii) Display the album details in the ascending order of their quantity. Select * from SARAGAM order by Quantity; c What will be the output of the following SQL statements : i) SELECT RIGHT(MID( MAHARAJA MAHAYOGI,,5),4); HARA ii) SELECT LEFT(SUBSTR( AARAHANAPAHARAN, -0,5),); AN Q6 a How e-governance has benefitted the common man? Check on corruption Increase in public participation Or any other benefits. b What benefits does e-business offer to a customer? Access to international markets Increased productivity Reduction in transaction and other costs Or any other benefits 4

10 c Enlist websites that provides e-learning platforms or any other websites on education

Visit For All NCERT solutions, CBSE sample papers, Question papers, Notes for Class 6 to 12

Visit For All NCERT solutions, CBSE sample papers, Question papers, Notes for Class 6 to 12 CBSE sample papers, Question papers, Notes for Class 6 to 1 KENDRIYA VIDYALAYA SANGTHAN SESSION ENDING EXAMINATION Informatics Practice ( CLASS XI) MM: 70 TIME:3:00 HRS Q.1 What is a Bluetooth? 1 Q. What