Answer any four from (a) to (g) questions : (4 x 2=8)

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1 SAMPLE PAPER Class XI Annual Examination Subject - Informatics Practices Max. Marks : 70 Time : 3 Hrs. Note : Read the instructions carefully before answering Q.1 Answer the following questions : ( 5 x 1 = 5 ) (a) What are the Strengths and Weakness of a Computer. (b) What are Input Devices? Explain any three. (c) Explain the working of a dot-matrix printer. (d) Explain the various types of Operating Systems. (e) Name some port types briefly. Q.2 What are the differences between any two ( 2 x 1 = 2 ) (a) Magnetic disks and Optical disks (b) Data and Information (c) Package and Utilities (d) Firmware and Malware (e) RAM and ROM Q.3 Define the any one of the term : ( 1 x 1 = 1 ) (a) Kilobyte (b) Address bus (c) Adware Q.4 Write the full forms of the following terms : ( 4 x 1/2 = 2 ) (a) OMR (b) LCD (c) VDU (d) CD - ROM Q.5 Answer any four from (a) to (g) questions : (4 x 2=8) (a) What are Identifiers? What are the Identifiers forming rules in Java? (b) Explain the following : 1. Event 2. Event Driven Program 3. Event Source 4. Listener

2 (c) What is data types? How many different primitive data types in java? What is the size and range of char data type. (d) What is Type Casting? Explain with an example. (e) What will be the result of a = 5 / 3, if a is (i) float (ii) int? (f) What will be the value of expression j = - - k + 2 k. if k is 20 initially? (g) The user wants to store the values, which data type should the user take for representing. (i) (ii) a (iii) hello (iv) false Q.6 Answer any three from following questions : (3 x 2=6) (a) Find the output of the following code fragments? (i) int s = 14 ; if (s < 20 ) jtextarea1.settext( Under ) ; else jtextarea1.settext( Over ) ; jtextarea1.append( the limit ) ; (ii) int i = 1, n = 0 ; while ( i < 4 ) { n + + ; i ++; jtextarea1.settext (n ) ; (b) Find out the error in the following code fragment and rewrite the corrected code with explanation. while ( i < j ) ; { System. out. println ( i * j ) ; i + + ; (c) How many times the following loop is executed? Explain. int x = 5, y = 50 ; while ( x < = y ) { x = y / x ;

3 (d) i. Write equivalent Java expression for the following expression a 2 + b 2 + c 2 ii. Compare if and switch statements. Q.7 Answer any four from (a) to (e)the following questions (4 x 2=8) (a) Design a GUI, with a TextField, Label and a Button. Write the code for the Button to accept a integer into the TextField from the user and then calculate and display the factorial of a given number in the Label provided.. (b) Rewrite the following fragment using while loop : int sum = 0 ; for ( int i = 0 ; i < = 5 ; + + i ) sum = sum + i ; jt1.settext ( Sum is : + sum ) ; (c) Rewrite the following fragment using switch : if ( ch = = E ) eastern + + ; if ( ch = = W ) western + + ; if ( ch = = N ) northern + + ; if ( ch = = S ) southern + + ; else unknown + + ; (d) Design a GUI, with a TextField, Label and a Button. Write the code for the Button to accept a integer number into the TextField from the user and then check wither the given number is palindrome or not and display the same as Palindrome or Not a Palindrome in the Label provided. (e) Design a GUI, with a TextField, TextArea and a Button. Write the code for the Button to accept a integer number into the TextField from the user and then display the multiplication table of the given number in the TextArea provided.

4 Q.8 Answer the following questions 3 (a) For the following GUI application. The percentage marks are to be entered in the TextField and upon clicking the Button, corresponding grade ( as per following rules ) should be displayed in the Label. Marks Percentage Grade Q9. > = 90 A A A B C D < 40 Fail a. Define the terms: (5 x 2= 10) i. Database Abstraction ii. Data inconsistency iii. Conceptual level of database implementation/abstraction iv. Primary Key v. Candidate Key b. Write SQL commands for (i) to (vi) and write output for (vii) on the basis of PRODUCTS relation given below: PCODE PNAME COMPAN Y PRICE STOCK MANUFACTU RE WARRA NTY (8X1=8) P001 TV BPL Jan-08 3 P002 TV SONY Mar-07 4 P003 PC LENOVO Apr-08 2 P004 PC COMPAQ Jun-09 2 P005 HANDYC AM SONY Mar-07 3 i. To show details of all the PC with stock more than 110. ii. To list the company which gives warranty for more than 2 years. iii. To find stock value of the BPL company where stock value is sum of the products of price and stock. iv. To show number of products from each company. v. To count the number of PRODUCTS which shall be out of warranty on 20- NOV vi. To show the PRODUCT name which are within warranty as on date. vii. Give the output of following statement. Select COUNT(distinct company) from PRODUCT. Select MAX(price)from PRODUCT where WARRANTY<=3

5 c. Write an SQL query to create the table Items with the following structure- Field Type Constraint Item_Id Varchar(5) Primary Key Item_Name Varchar(25) Manufacturer Varchar(15) Color Varchar(15) Price Integer Quantity Integer Not Null d. Find the outputs- 2 (a) SELECT ROUND ( ,1); (b) SELECT CONCAT(LOWER( xihum ), UPPER( xisc ),LOWER( xicom )); (c) SELECT MID( ABS Public School,4,8); (d) SELECT SUBSTR( TRIM( INDIA IS GREAT ),3,9); 4x1=4 e. What is the use of UPDATE command?. 2 f. Which SQL command is used to list the structure of a table? 2 g. What is LIKE clause? 2 Q10 a. What is e-governance? What are its benefits? 2 b. What is e-business? What are its Societal impacts? 2 c. Write name of two e-learning websites. 1

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