Q13. What is the meaning of Open Source in the term Open Source Database Management

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1 DEHRADUN PUBLIC SCHOOL ASSIGNMENT ( ) SUBJECT-INFORMATICS PRACTICES (065) CLASS - XII Chapter 1. Computer Networking Q1.How is firewall useful in ensuring network security? [CBSE 2016] Q2.How is it easier to diagnose fault in Star topology than in bus topology? [CBSE 2017] Q3.Distinguish between LAN and WAN. [CBSE 2015] Q4.Write the name of the most suitable wireless communication channels for each of the following situations? a. Communication between two offices in two different countries. b. To transfer the data from one mobile phone to another [CBSE 2012] Q5.What do you understand by Domain Name Resolution? [CBSE 2015] Q6.What is MAC address? What is the difference between MAC and IP address? Give one example of each. [CBSE 2013] Q7.Write one advantage and disadvantage of optical fibre. [CBSE 2014] Q8.What is the use of repeater in a Network? How is it different from Hub? [CBSE 2013] Q9.What is the purpose of logical address of a computer? [CBSE 2017] Chapter 2. Open Source Concepts Q10. What is the objective behind developing UNICODE? [CBSE 2014] Q11. Distinguish between Phonetic text entry and Keymap based text entry. [CBSE 2015] Q12. What is the full form of the following: [CBSE 2013][CBSE 2014] i) ODF ii) HTTP iii) OSI iv) FLOSS Q13. What is the meaning of Open Source in the term Open Source Database Management System? [CBSE 2016] Q14. Difference between Proprietary and Open Source Software. [CBSE 2011, 2014, 2015] Q15. After realizing the issues with proprietary software, Ms. Sunita has decided to use only Open Source Software. Suggest any one suitable open source software to her, for each of the following categories: i) Operating System ii) Browser Chapter 3. Java GUI Programming Revision Tour -I Q16. In a switch statement, what is the purpose of default section? [CBSE 2015] Q17. Re-write the following if-else segment using switch case statement: char ch = P ; if ((ch== p ) (ch= = P )) System.out.println( Platinum ); if (ch= = g ) (ch == G ) System.out.println( Gold ); if(ch == S ) System.out.println( Silver ); else System.out.println( Normal ); Q18. What will be the value of C after the execution of the following code: [CBSE 2017] int P; int R=8; int oddnum; int C=0; for(p=1; P<R; P=P+3) oddnum = P%2; if (oddnum==1) Page 1 of 9

2 C=C+1; Q19. Write java code that takes the value for a number (n) in jtextfield1 and cube (n*n*n) of it to be displayed in jtextfield2. [CBSE 2012] Q20. Write the output in jtextfield1 if depcode is 3: [CBSE 2016] switch (depcode) case 1 : allowance=4000; break; case 2 : allowance=3200; break; default : allowance=1000; jtextfieldl.settext( " " +allowance); Q21. What is the purpose of parseint( ) method. [CBSE 2016] Q22. Give the output of the following Java code: String x; String str = Java ; x = str.concat ( study ); double a = ; jtextfield1.settext (x.length()+ ); jtextfield2.settext (x.touppercase () ); jtextfield3.settext (x.substring (2,5)); jtextfield4.settext (Math.round(7.8765)+ ); Q23. What will be the displayed in jtextfield1 and jtextfield2 after the execution of the following code? [CBSE 2017] int ndigits=0; int N=35; while (N>12) ndigits=ndigits+1; N=N-10; jtextfield1.settext( +ndigits); jtextfield2.settext( +N); Q24. The following code has some error(s).rewrite the correct code underlining all the corrections made: int n=5,int i=1,f=1; do; f=f*i; i++; while(i<=n) jtextfield1.settext(""+f); Q25. Rewrite the following program using a for loop: int i = 1,sum = 0; while(i<10) sum + =i; i+=2; Q26. Observe the following code carefully and find which statement will never get executed in the code : int Count = 1 ; //Statement 1 do //Statement 2 //Statement 3 Page 2 of 9

3 if (Count < 15 ) //Statement 4 jtextfield1.settext ( Jump ) ; //Statement 5 else //Statement 6 jtextfield1.settext ( Stop ) ; //Statement 7 Count += 4 ; //Statement 8 //Statement 9 while ( t <= 15 ) ; //Statement 10 Q27. How many times will the following loops execute? Which one of them is Entry Controlled and which one is Exit Controlled? [CBSE 2013] int j=8, total=0 ; while(j>1) total+=j; j- =2; Loop1 int j=8, total=0 ; do total+=j; j-=2; while(j >1); Loop2 Chapter 4. Java GUI Programming Revision Tour -II Q28. Write Java statement to extract selected item from a given listbox named jlist1 [CBSE 2016] Q29. What is the difference between jtextfield and jpasswordfield components? [CBSE 2015] Q30. Write a statement to make jtextarea1 un-editable. [CBSE 2013] Q31. Write a statement in Java to declare a String type variable with a name City. [CBSE 2014] Q32. What will be the content of the jtextarea1 after executing the following code: for(int i=5;i<=25;i+=5) jtextarea1.settext (jtextarea1.gettext ( ) + + Integer. tostring(2*i)); [CBSE 2014] Q33. What will be displayed in jtextarea1 after executing the following statement? [CBSE 2012] jtextarea1.settext( GREAT\nCOUNTRY\t INDIA ); Q34. Given a string object named Pay having value as stored in it.obtain the output of the following: JOptionPane.showMessage Dialog(null, +Pay.Length( )+Integer.parseInt(Pay)); [CBSE 2012] Q35. Aditya is a programmer at Edudel enterprises. He created the following GUI in NetBeans. Help him to write code in java for the following: [CBSE 2013] a) To calculate Total marks obtained and display in TextField on the click of command button Get Total. Assume there are three subjects. b) To calculate Grade obtained and display in TextField on the click of command button Get Grade. Criteria for Grade calculation is given below: Marks Grade Above 80 A Above 65 and <=80 B Above 50 and <=65 C <=50 D Page 3 of 9

4 c) To stop execution and exit from the application on the click of command button Exit. Q36. Mr. Radhey Shyam Bansal the owner of the Kiddi Land Enterprises has asked his programmer Ekta to develop the following GUI in Netbeans.Mr. Bansal accepts payment through three types of credit cards. The discount is given according to the following scheme: [CBSE 2011] Type Of Card Platinum Gold Silver Discount 20% of amount 15% of amount 10% of amount If the Bill amount is more than Rs. 25,000 then the customer gets an additional discount of 5%.Write Java code for the following: a) To assign Additional Discount as 0 (jtextfield4) and net Amount as 0 (jtextfield5). Also set them as un-editable. b) [When Calculate Discount (jbutton1) is clicked] To calculate discount as per the given criteria and display the same in jtextfield3.to assign Additional Discount (jtextfield4) as 5% of amount (jtextfield2) as per the above condition. c) [ When Calculate Net Amount (jbutton2) button is clicked] To calculate net Amount as[totalcost (jtextfield2)-discount(jtextfield3)-additional discount(jtextfield4)].to display the Net Amount in jtextfield5. Chapter 5. Java GUI Programming Revision Tour -III Q37. Define Object Oriented Programming. [CBSE 2014] Q38. Define Class with reference to Object Oriented Programming. Q39. Consider the following java class: public class Date public int day; public int month; public int year; public Date(int d,int m,int y) day = d; month = m; year = y; i) How many instance variables does it have? ii) Create a Date Object corresponding to 9 th June Chapter 6. Commonly Used Libraries Q40. What will be the content of F1 and F2 after the code is executed: [CBSE 2014] String F1= Hello, String F2= Friend ; F1=F1.concat (F2); Q41. Predict the output : string Subject = Informatics Practices ; jtextfield1.settext (Subject. Length ( ) ); Page 4 of 9

5 Q42. Predict the output : String Text2, Text1; Text1 = Good Morning ; Text2 = India ; Text1= Text2.concat (Text1); Chapter 7.Concept of Inheritance Q43. Explain the concept of Inheritance with the help of example. [CBSE 2014] Q44. Illustrate the concept of function overloading with the help of an example. Chapter 8.Database Connectivity to MySQL Q45. Briefly explain the concept of ResultSet method. Also, discuss the next ( ) and first ( ) methods. Write appropriate java statement to help him in performing the same. [CBSE 2012] Q46. What is the difference between executequery( ) and executeupdate( ) methods? Q47. What is Connection? Q48. Explain ODBC and JDBC. Q49. Name two commonly used drivers used for database connectivity from Java application. Chapter 9. Web Application Development Q50. What is a protocol? How do protocols affect Internet? Q51. Differentiate between a web browser and web server. Q52. In the URL, what is the http component? Q53. In the URL, what is the component? Q54. In the URL, what is the pr/master.htm component? Q55. What is a URL? What are its components? Exemplify. Q56. What is Client-Server computing? Chapter 10. HTML-I: Basic HTML Elements Q57. Which HTML tag and corresponding attributes are used to establish default font size of entire page? Q58. Which HTML tag and corresponding attributes are used to include an image as the background of an HTML document? [CBSE 2012] Q59. How is<p> tag different from <BR> tag in HTML? [CBSE 2013] Q60. Write any two differences between <HR> and <H1> tag? [CBSE 2013] Q61. After typing the HTML code using a text editor, how do you see it would look as a webpage? [CBSE 2015] Q62. What is the use of <FONT> tag in HTML code? Write any two options used with this tag. [CBSE 2014] Q63. Identify the error(s) in the following HTML code. Also write the correct code. [CBSE 2013] <BODY Color = Red background = school.jpg > Q64. What is the use of IMG tag? Name one attribute of it. [CBSE 2013] Q65. Differentiate between <UL> and<ol> tag. Q66. Write the output of the following HTML code: [CBSE 2017] <ol start= 4 > <li>bake the mixture in oven for an hour</li> <li>remove from oven</li> <li>allow the mixture to stand for ten minutes</li> <li>serve</li> </ol> Q67. Write HTML tags to do the following: [CBSE 2016] a. Inserting a horizontal line in a webpage. b. Inserting a line break. Page 5 of 9

6 Chapter 11.HTML-II: Lists, Tables and Forms Q68. Write the name of the HTML tag used to include numbered list in a HTML Web page. [CBSE 2012] Q69. Which HTML tags are used for making a table and adding rows in a HTML document? [CBSE 2011] Q70. Which attribute is used to control the inside table border? Q71. How is spacing in cells in table controlled? Q72. Write HTML code for displaying the following in a Web Page: 1. System Software Windows vista Linux 2. Application Software MS Office PageMaker Q73. What is the difference between basefont and font tag? Q74. What is the role of ALIGN attribute of <TABLE> tag? Q75. What is wrong with the following coding: <OL type = a start = d > Q76. Differentiate between ordered and unordered list. Q77. Write HTML code to produce these controls a. A text box b. A text area with 10 rows and 30 columns c. A password textbox Chapter 12. XML extensible Markup Language Q78. Differentiate between XML and HTML. [CBSE 2016] Q79. With XML there are no predefined tags. Explain in brief with the help of an example. [CBSE 2015] Q80. What are the components of an XML file in terms of logical structure? Q81. Consider the following XML document. Check this for well- formedness. <name> Jeevan</name> <name> Raunak</name> <name>vasu</name> Q82. Change the XML code of previous question so that it is well-formed. Q83. Differentiate between SGML and XML. Chapter 13.MySQL Revision Tour Q84. Write two examples of DBMS software. [CBSE 2014] Q85. Write MySQL command to open an existing database. [CBSE 2012] Q86. Ms. Akansha wants to remove the entire contents of a table AIRLINES along with its structure to release the storage space. What MySQL statement should she use? [CBSE 2012] Q87. What is the purpose of ALTER TABLE command in MySql? How is it different from UPDATE command? [CBSE 2011] Q88. A table STUDENT has 4 rows and 2 columns and another table TEACHER has 3 row and 4 columns. How many rows and columns will be there if we obtain the Cartesian product of these two tables? Q89. Consider the table: [CBSE 2016] Table:Company CompanyCode Donations C C102 NULL C C What output will be displayed by the following SQL statement? SELECT AVG(Donations) FROM Company; Q90. What is the difference between % and _ wild card characters with reference to LIKE clause of MySQL? Q91. Write SQL commands for the following on the basis of given table: [CBSE 2017] Table:Infant Page 6 of 9

7 ItemCode Item DatePurchase UnitPrice Discount 101 Frock Cot Soft Toy Baby Socks Baby Suit (i) Write a query to display the details about the Cot. (ii) Write a query to display the names of items and their unit price that have unit price less than 800 and discount more than 5%. (iii) Write a query to display the names of items and their date of purchase that were purchased after 31 st December, (iv) Write a query to display the number of items that have more than 10% as discount. (v) Write a query to display the item code and unit price in descending order of unit price. (vi) Write a query to increase the unit price of each item by 10% of their unit price. (vii) Write a query to display the names of items that have Baby anywhere in their item names. (viii) Write a query to display the highest unit price of items. Q92. Consider the table MCA given below. Write commands in SQL for (i) to (iv) and output for (v) to (viii) Table: MCA Mno Name Address Join_Dt Fee Semester 1001 Rahul 12,Vasant Kunj I 1002 Amit 187, R.K.Puram II 1003 Rakhi B6,Lajpat Nagar I 1004 Suhas 345,Nabi Karim III 1005 Deepika 10,Geeta colony IV 1006 Harish L-12,Preet vihar III 1007 Aparna H12, Hari Nagar I (i) To display all information from the table MCA. (ii) To display Mno and Name of those student who joined after 31 st Jan (iii) To display Name, fee and semester of those student who are in III semester. (iv) To display the name of students whose name has last alphabet as A. (v) Select Avg(Fee) from MCA where Semester = I ; (vi) Select Max(Fee) from MCA where Name like a%. (vii) Select count(distinct semester) from MCA. (viii) Select Name from MCA where name like %n ; Chapter 14. Database Transactions Q93. What do you mean by committing a transaction? [CBSE 2012] Q94. What does transaction ROLLBACK indicate? [CBSE 2012] Chapter 15.More on SQL-Grouping Records and Table Joins Q95. Mr. Shankar created a table VEHICLE with 3 rows and 4 columns. He added 1 more rows to it and deleted one column. What is the Cardinality and Degree of the Table VEHICLE? Q96. Consider the tables Employee and Project given below: Table: Employee Table: Project Name Gender Designation P_Code P_code P_Name Size Rahul M Programmer 2 1 Financial Accounting Large System Sanjana F Analyst 1 2 Library System Medium Radhika F Programmer 1 3 Inventory Control Small Anuradha F Analyst 3 Harish M Analyst 2 Page 7 of 9 System With reference to these tables, write commands in SQL for (i) and (ii) and output for (iii). (i) Display the Name and Designation of the employess who have taken under the Library System Project. (ii) Display the Number of Employees involved in Financial Accounting System.

8 (iii)select Name, Gender, Designation from Employee, Project where Employee.P_Code = Project.P_Code and Size = small ; Q97. In a Database there are two tables: Table: ITEM Table: BRAND Item_Code Item_Name Price 111 Refrigerator 90, Television 75, Computer 42, Washing Machine 27,000 Write MySql queries for the following: (i) To display Item_Code, Item_Name and corresponding Brand_Name of those Items, whose Price is between and 40000(both values inclusive) (ii) To display Item_Code, Price and Brand_Name of the item, which has Item_name as Computer. (iii) To increase the price of all the Items by 10%. Q98. Name two Group (Aggregrate) Functions of SQL. [CBSE 2016] Q99. Consider the table below: [CBSE 2016] Table : Company EMPID DEPARTMENT SALARY E101 PERSONNEL E102 ACCOUNTS E103 MARKETING E104 PERSONNEL E105 PERSONNEL E106 MARKETING Identify error(s) in the following SQL statement. Rewrite the correct SQL statement. SELECT department, salary FROM Company GROUP BY Department; Chapter 16. Tables and Integrity Constraints Q100. How is primary key constraint different from unique constraint? Q101. Mr. Sondhi created two tables with DEPTNO as primary key in Table1 and foreign key in Table2. While inserting a row in Table2. Mr. Sondhi is not able to enter a value in the column DEPTNO. What could be the possible reason for it? [CBSE 2012] Q102. What is the significance of NOT NULL constraint? Q103. Write the SQL command to create the following table as per the given specifications: Table Name: Hospital Field Name Data Type Size Constraint Pno Integer 4 Primary Key Name Varchar 20 Unique Age Integer 2 Department Varchar 15 Default OPD Date Date Charges Decimal 7,2 >100 Gender Char 1 Default M Q104. Write SQL command to add a new column for the table given above with the following specification: Field Name Data type Size Doctor_name Varchar 20 Q105. Write SQL command to update the table Hospital for the field Doctor_name and set the value as Dr. Khanna for all the patients of Cardiology department. Chapter 17. IT Applications Q106. What is the impact of e-learning websites on students learning process? [CBSE 2011] Page 8 of 9 Item_Code 111 LG 222 Sony 333 HCL 444 IFB Brand_Name

9 Q107. Write two advantages of e-business sites. How do online retailers usually offer customers a wider range of products at prices that are lesser than those of traditional stores? [CBSE 2017] Q108. Write three important features of e-governance. Give URL of one of the commonly used e- Governance portal. [CBSE 2011] Q109. List two advantages of e-governance to a disabled person. [CBSE 2017] Q110. Vijayan works for the Customs Department. He wishes to create controls on a form for the following functions. Choose appropriate control from Text box, Label, Option button, Check box, List box, Combo box, Command button. [CBSE 2012] SNo Control used to Control 1 Enter Last name 2 Enter gender 3 Choose city from list of cities 4 Submit form x Page 9 of 9

13. What is the meaning of Open Source in the term Open Source Database Management. 14. Difference between Proprietary and Open Source Software.

13. What is the meaning of Open Source in the term Open Source Database Management. 14. Difference between Proprietary and Open Source Software. Dehradun Public School I-Term Assignment (2016-17) Subject-Informatics Practices (065) Class -XII Chapter 1. Computer Networking 1. How is firewall useful in ensuring network security? [CBSE 2016] 2. State