Mr. Bansal accepts payment through three types of credit cards. The discount is given according to the following scheme:

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1 Class XII IP GROUP_1 Question Bank From previous Year CBSE Board Question Papers Advanced GUI Programming-More on Swing Controls 011 Q. Mr. Radhey Shyam Bansal the owner of the Kiddi Land Enterprise has asked his programmer Ekta to devlop the following GUI in Netbeans. Mr. Bansal accepts payment through three types of credit cards. The discount is given according to the following scheme: If the bill amount is more than Rs. 5,000/- then the customer gets an additional offer of 5%. Write java code for the following: i. To assign Additional Discount as 0 (jtextfield4) and Net amount as 0 (jtextfield5). Also set them as un-editable. 1 ii. 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 (jtextfield) as per the above condition. To enable Calculate Net Amount (jbutton) button iii. Answer: [when Calculate Net Amount (jbutton) button is clicked] To calculate net amount as [TotalCost(jTextField)- Discount (jtextfield3) -Additional Discount (jtextfield4)] To display the net amount in jtextfield5. 1

2 (i) jtextfield4.settext("0"); jtextfield5.settext("0"); jtextfield4.seteditable(false); jtextfield5. seteditable(false); (ii) double discount = 0.0 ; double billamount=double.parsedouble(jtextfield.gettext()); if(jradiobutton1.isselected()) discount = 0.0; if(jradiobutton.isselected()) discount = 0.15; if (jradiobutton3.isselected()) discount = 0.10; jtextfield3.settext(billamount * discount + ) ; if (billamount > 5000) jtextfield4.settext (billamount*0.05+ ); jbutton.setenabled(true) ; (iii) doube netamount = Double.parseDouble(jTextField.getText()) Double.parseDouble(jTextField3.getText()) Double.parseDouble(jTextField4.getText()); jtextfield5.settext(netamount + " "); 01 Q. Janav Raj is a programmer at Path Educo Enterprises. He created the following GUI in NetBeans. Help him to write code for the following: i. To display series of odd or even number (depending on Starting NumberjTextField1 is even or odd) in the jtextarea on the click of command button [Display The Series]. ii. To clear both the text fields and text area, on clicking [Reset] button. iii. To terminate the application on the click of [stop] button. (Assume suitable names for the various controls on the Form) 1 Answer: i. int num1=integer.parseint(starttextfield.gettext()); int num=integer.parseint(stoptextfield.gettext()); seriestextarea.settext(null); if((num1 % )==0) for(int i=num1;i<=num;i=i+)

3 seriestextarea.append(i+" "); else for(int i=num1;i<=num;i=i+) seriestextarea.append(i+" "); ii. seriestextarea.settext(null); starttextfield.settext(null); stoptextfield.settext(null); iii. System.exit(0); 013 Q. Aditya is a programmer at Edudel enterprises. He created the following GUI in NetBeans. Help him to write code in java for the following: (i) To calculate Total marks obtained and display in jtextfield4 on the click of command button Get Total. (ii) To calculate Grade obtained and display in jtextfield5 on the click of command button Get Grade. Criteria for Grade calculation is given below: (iii) To stop execution and exit from the application on the click of command button Exit. 1 3

4 Answer: (i) private void jbutton1actionperformed(java.awt.event.actionevent evt) int a=integer.parseint(jtextfield1.gettext()); int b=integer.parseint(jtextfield.gettext()); int c=integer.parseint(jtextfield3.gettext()); int total=a+b+c; jtextfield4.settext(integer.tostring(total)); (ii) int t=integer.parseint(jtextfield4.gettext()); int a=t/3; if(a>=80) jtextfield5.settext("a"); else if(a>65 && a<=55) jtextfield5.settext("b"); else if(a>50 && a<=65) jtextfield5.settext("c"); else if(a<=50) jtextfield5.settext("d"); (iii) System.exit(0); 014 Q. Mr. Rangaswami works at a Recreation Park as a system analyst. He has created the following GUI. When a group arrives at the Recreation Park, the number of people in the group and whether the group wants to enjoy the Water Park or not is entered. Entry fee is Rs. 500 per person. The person can choose to play at Water park by selecting the checkbox. Rides of Water Park will cost Rs. 50 extra per person. Help him to write code for the following: (i) On the click of Calculate button, textfield for Entry Fees should display Entry Fees per person x number of people. If Water Park check box is selected, textfield for Water Park charges should display Water Park Charges per Person x Number of People. textfield for total Amount should display sum of Entry Fees and Water Park charges for all the people in the group. 3 4

5 (ii)write java code to clear all Textboxes on the click of Clear Button. 1 (iii) Write java Code to close the application on the click of Exit Button. 1 Answer: i. Int wfee=0; Int tfee=0; Int nop=integer.parseint(jtextfield1.gettext()); Int efee=nop*500; If(JCheckBox1.isSelected()) Wfee=nop*500; tfee=efee+wfee; jtextfield.settext( +efee); jtextfield3.settext( +wfee); jtextfield4.settext( +tfee); ii. JTextField1.setText( ); JTextField.setText( ); JTextField3.setText( ); JTextField4.setText( ); iii. System.exit(0); 015 Q. The students of Shiksha Vidyalaya work for different extracurricular activities like community Outreach Program, Swachh Bharat Abhiyan and Traffic Safety Club. The Programmer at the school has developed a GUI application as shown below: A student can participate in more than activities. Each student gets 10 points for each activity- namely Community Outreach Programme, Swachh Bharat ABhiyan and Traffic Safety Club. 5

6 Help the programmer to write code for the following: (i) When Calculate Total Score button is clicked, the points for each activity (that is selected) should be displayed in the text field in from of that activity s checkbox and the Total score should be displayed in the appropriate Text field. 3 (ii) When Clear button is clicked, all the Textfields and Checkboxes should be cleared. 1 (iii) When Stop button is clicked, the application should close. 1 (i) int score=0; if(jcheckbox1.isselected()) jtextfield3.settext("" + 10); score=score+10; if(jcheckbox.isselected()) jtextfield4.settext("" + 10); score=score+10; if(jcheckbox3.isselected()) jtextfield5.settext("" + 10); score=score+10; jtextfield6.settext(""+score); (ii) jtextfield1.settext(""); jtextfield.settext(""); jtextfield3.settext(""); jtextfield4.settext(""); jtextfield5.settext(""); jtextfield6.settext(""); jcheckbox1.setselected(false); jcheckbox.setselected(false); jcheckbox3.setselected(false); (iii) System.exit(0); Class XII IP Question Bank From previous Year CBSE Board Question Papers Database Management System-Concepts Q.1 What is SQL? Ans. SQL is Non-procedural universal data access language used to access and manipulate data stored in nearly all the data bases available currently. SQL standards are defined by ANSI (American National Standards Institute). SQL statements are used to retrieve and update data in a database. SQL works with database programs like MySQL, MS Access, DB, Informix, MS SQL Server, Oracle, Sybase, etc. Q. Differentiate between DDL and DML? (011-1) Ans Data Definition Language (DDL): This is a category of SQL commands. All the commands which are used to create, destroy, or restructure databases and tables come under this category. Examples of DDL commands are - CREATE, DROP, ALTER. Data Manipulation Language (DML): This is a category of SQL commands. All the commands which are used to manipulate data within tables come under this category. Examples of DML commands are - INSERT, UPDATE, DELETE. Q.3 What is a constraint? Ans : A constraints is a condition or check application on a field or set of fields. Example: NOT NULL (ensure that column con not have null value), CHECK (make 6

7 sure that all value satisfy certain criteria), UNIQUE (ensure that all values in a column are different) etc. Q.4 What are single row functions? (010-11) Ans: Single Row Function work with a single row at a time. A single row function returns a result for every row of acquired table Examples of Single row functions are Sqrt(), Concat(), Lcase(), Upper(), Day(), etc. Q.5 Compare CHAR and VARCHAR data types. (01-13) Ans. The CHAR data-type stores fixed length strings such that strings having length smaller than the field size are padded on the right with spaces before being stored. The VARCHAR on the other hand supports variable length strings and therefore stores strings smaller than the field size without modification. Q.6 What are the differences between DELETE and DROP commands of SQL? (013-14) Ans: DELETE is DML command while DROP is a DDL command. Delete is used to delete rows from a table while DROP is used to remove the entire table from the database. Q.7 What do you understand by MySQL Client? (010-11) Ans: MySQL Clients are programs that connect to MySQL Server and issue queries in predefined format. Q.8Differentiate between Alternate key and Candidate key. 011 Answer: Q.9 What is the purpose of ALTR TABLE command in MySql? How is it different from UPDATE command? 011 Answer: ALTER TABLE command is used to modify the structure of a table. GROUP_ CONTROL STRUCTURE S.N O YEAR QUESTION /ANSWER MARK A 7

8 1 016 Identify the odd one out of the following Java statements. State reason for your choice. 1 (i) for (ii) do while (iii) switch (iv) while 014 What will be the values of variables agg and agg1 after the execution of the following loops? What will be displayed in jtextarea1 after the execution of the following loop? for(int I=5; I>=;I--) jtextarea1.settext(jtextarea1.gettext()+ +Integer.toString(I*I)); What will be displayed in jtextarea1 after the execution of the following code: int G=1; do jtextarea1.settext(integer.tostring(g++)); G=G+1; while(g<=5); 5 01 What is the purpose of break keyword while using Switch Case Statement? Illustrate with the help of an example How many times will the following loops execute? Which one of them is Entry Control and which one is Exit? What will be displayed in jtextfield1 and jtextfield after the execution of the following loop? int Sum=0,Last=10; for (int C=1;C<=Last;C+=) Sum++; jtextfield1.settext(integer.tostring(sum)); jtextfield.settext(integer.tostring(c)); Rewrite the following program code using a if statement. String Remarks; int Code=Integer.parseInt(jTextField1.getText()); switch(code) case 0 : Remarks= 100% Tax Exemption ; 8

9 break; case 1 : Remarks= 50% Tax Exemption ; break; case : Remarks= 3% Tax Exemption ; break; default: Remarks=! Invalid Entry ; Observe the following code carefully and find which statement will never get executed in the code? int t=1; //Statement 1 do //Statement //Statement 3 if (t>13) //Statement 4 jtextfield1.settext("something"); //Statement 5 else //Statement 6 jtextfield1.settext("pass"); //Statement 7 t+=3; //Statement 8 //Statement 9 while (t<=15); //Statement What message will be displayed after the execution of the following code? int Age=64,Relaxation=4; int ModiAge=Age Relaxation; if (ModiAge<60) joptionpane.showmessagedialog(null, NOT eligible ); else joptionpane.showmessagedialog(null, eligible ); 1 FUNCTION IN MYSQL S.NO YEAR QUESTION MARKA (i)name Group (Aggregate) function of SQL? (ii) Consider the table Table : Company CompanyCode Donations C C10 NULL C C What output will be displayed by the following SQL Statement? SELECT AVG(Donations) FROM Company; 014 Distinguish between Single Row and Aggregate functions of MySQL. Write one example of each A numeric column MONEY contains write a command to truncate MONEY (i) Up to decimal places. (i.e. expected result ) (ii) (ii) Up to -3 places. (i.e. expected result 34000) Shanya Khanna is using a table Employee. It has the following columns. Admno, Name, Agg, Stream [coloumn Agg contains Aggregate marks] 9

10 She wants to display highest Agg obtained in each Stream. She wrote the following statement: SELECT Stream, MAX(Agg) FROM Employee; But she did not get the desired result. Rewrite the above query with necessary changes to help her get the desired output What is the difference between CURDATE () and DATE () functions? There is a column Salary in a Table EMPLOYEE. The following two statements are giving different outputs. What may be the possible reason? SELECT COUNT(*) FROM EMPLOYEE; SELECT COUNT(SALARY) FROM EMPLOYEE; PROGRAMMING FINDAMENTALS S.NO YEAR QUESTION MARKA Write the purpose of parseint() method Identify invalid variable names out of the following. State reason if 1 invalid. (i) for (ii).salary (iii) salary1 (iv) product What is the difference between statement (i) and (ii) (i) t = (ii) if(t= 1 =) d= Is a string containing a single character same as a char? Write a statement in Java to declare a String type variable with a 1 name City Distinguish between / and % operator What will be the value X1 after execution of the following code: 1 String x1= Spread, x= PEACE ; x1=x.concat(x1); Write Java statement to make a jtextfield1.disabled Mr. Kapoor is a programmer at Ekansh Enterprises. He created 5 digit 1 password and stored in a string variable called strpassword. He wants to store the same password in an Integer type variable called intpassword. Write an appropriate Java statement to transfer the content from strpassword to intpassword Write a java statement to make the jtextfield1 non-editable What will be the contents of Str1 and Str after the following code is executed? String Str,Str1; Str1="Dear Friend"; Str="Hello"; Str1=Str.concat(Str1); GROUP_3 Question Bank of Previous year Web Application Development S.NO QUESTIONS MARKS YEAR. 1 Which HTML tags are used for making a table and adding rows in a HTML document? How is <OL> tag different from <UL> tag of HTML? Differentiate between XML and HTML Write the name of HTML tag used to include numbered list in a HTML Web Page Write HTML code for the following:

11 To provide hyperlink to a website : 6 Differentiate between the <TR> and <TD> tags of HTML with the help of an appropriate example. 7 Name two attributes of FONT tag of HTML (i) Insert a picture in the web page. (ii) Insert an empty line in the web page Give two attributes of Table element of HTML After typing the HTML code using a text editor, how do you see how it would look as a web page? 11 With XML there are no predefined tags Explain in brief with 015 the help of an example outside outside 11

12 Mysql Advanced & Data Base Transitions Q.1 What is a Transaction? Which command is used to make changes done by a transaction 015 permanent on a database? Q. 01 Q.3 01 Q.4 01 Q.5 Mr. Krishnaswami is working on a database and has doubt about the concept of SAVEPOINT in a transaction. Write down the meaning of SAVEPOINT and provide a simple example considering yourself as an online web support executive. 013 Q.6 What is the use of COMMIT statement in SQL? How is it different from ROLLBACK statement? 013 1

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14 Q.10 What happens when ROLLBACK command is issued in a transaction process? 013 Q.11 Shanya Khanna is using a table Employee. It has the following columns. Admno, Name, Agg, Stream [ column Agg contains aggregate marks] Shewants to display highest Agg in each stream. She wrote the following statement: SELECT Stream, MAX(Agg) FROM Employee; But she did not get the desired result. Rewrite the above query with necessary changes to help her get the desired output. Q (i) To display all information of the students of humanities in descending order of percentage. (ii) To display Adno, Name, Percentage and Stream of those students whose name is less than 6 characters long. (iii) To add another column Bus)Fees with datatype and size as decimal (8,). (iv) To increase percentage by % of all the humanities students. (v) SELECT COUNT(*) FROM EXAM; (vi) SELECT Sname, Percentage FROM EXAM WHERE Name LIKE N% ; (vii) SELECT ROUND(Percentage,0) FROM EXAM WHERE Adno= R005 ; Q

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17 Q GROUP_4 Networking and Open Source Softwares 1 Expand the following abbreviations and explain in brief : 007 (i) FLOSS (ii) GNU Write one point of difference between a freeware and free software Write one example to show how Data mining is helpful in decision 007 making. 4 How is Post implementation review important during System 007 development Life Cycle? 5 Identify the type of relationship represented in the following statement 007 and draw an Entity Relationship Diagram to show it : A customer can buy many items Ms. Taufiq Ahmed wants to prevent unauthorized access to/from his 011 company's local area network. Write the name of a system (software/ hardware), which he should install to do the same 7 Beauty Lines Fashion Inc. is a fashion company with design unit and market unit 135 metres away from each other. The company recently connected their LANs using Ethernet cable to share the stock related information. But after joining their LANs, they are not able to share the information due to loss of signal in between. Which device out of the following. Should you suggest to be installed for a smooth communication?

18 (i) UPS (ii) Modem (iii) Repeater 8 Which of the following is not a feature of Networking? (i) Resource sharing (ii) Uninterrupted power supply (iii) Reduced cost (iv) Reliability 9 Name any two Indian scripts included in Unicode Mr. Jayanto Das is confused between Shareware and Open source 011 software Mention at least two points of differences to help her understand the same. 11 Identify the type of Topology from the following: 011 (i) If each node is connected with the help of independent cable with the help of a central switching (communication controller) (ii) If each node is connected with the help of a single co-axial cable. 1 Define the following with reference to Threats to Network Security. 011 (i) Trojan Horse (ii) Worm 13 Skte t'wo advantages of networking computers instead of having 014 standalone computers. 14 What was the objective behind developing UNICODE? Expand the following terms : 014 (i) WAN (ii)oss 16 What is the purpose of switch in a network? Identify the following devices : 014 (i) An intelligent device that connects several nodes to form a network and redirects the received information only to intended node(s). (ii) A device that regenerates (amplifies) the received signal and retransmits it to its destination. 18 What is the name of the network topology in which each hode is 014 connected independently using a switch? 19 What is meant by "Denial of Service" with reference to Internet service 014? 0 Why is a switch called an intelligent hub? 014 outside delhi 1 What was the objective behind developing UNICODE? 014 outside delhi Expand the following terms : (i) OSS (ii) ODF 014 outside delhi 3 What is the use of Repeater in a Network? 014 outside delhi 4 Identify the following device : (i) A device that is used to connect different types of networks. It performs the necessary translation so that the connected networks can communicate properly. (ii) A device that converts data from digital bit stream into an 014 outside delhi 18

19 analog signal and vice versa. 5 Write one advantage and one disadvantage of using Optical fibre cable. 014 outside delhi 6 Distinguish between Open Source Software and Proprietary Software. 014 outside 7 Given below are two addresses : (i) (ii) Identify which one of the above is an IP address and which one is a URL. 8 Expand (i) ODF (ii) HTTP delhi 014 compartment 014 compartment 9 How is a Trojan Horse harmful to a network? 014 compartment 30 What do the following top level domains signify? (i).edu (ii).org 014 compartment 31 Write one advantage each of Star and Bus topology used in networking. 014 compartment 3 List two measures to secure a computer network. 014 compartment 33 What is common in all of the following software(s)? Firefox, Perl, PHP, OpenOffice.org Write one feature of the above category of software. 014 compartment 34 A company has 3 departments namely Administrative, Sales, Production. Out of telephone cable, Optical Fiber, Ethernet Cable, which communication medium is best for high speed communication between departments? Name one open source Indian operating system What is the purpose of a Server in a network? What do the following top level domains signify? (i).com (ii).org List measures to secure a network Distinguish between MAC address and IP address with the help of 015 example of each. 40 Distinguish between Phonetic text entry and keymap based entry of 015 typing Indian language text. 41 A school with 0 stand-alone computers is considering networking them together and adding a server. State advantages of doing this Distinguish between LAN and WAN What is the purpose of Modem in network? Write one example of IP Address

20 45 Define Domain Name Resolution Name two threats to security in a network. What is the role of Firewall in Network security? 47 Write one advantage and one disadvantage of Open Source software over Proprietary software. 48 Vidya College has three departments that are to be connected into a network. Which of the following communication medium (out of the given options), should be used by the college for connecting their departments for very effective High Speed communication? Coaxial Cable Optical Fiber Ethernet Cable Also name the type of network (out of PAN/LAN/WAN) formed. 49 State reason why Star topology requires more cable length than Bus topology. 50 Seema needs a network device that should regenerate the signal over the same network before the signal becomes too weak or corrupted. Amit needs a network device to connect two different networks together that work upon different networking models so that the two networks can communicate properly. Name the devices that should be used by Seema and Amit How is a domain name related to an IP address? How is firewall useful in ensuring network security? Two doctors have connected their mobile phones to transfer a picture file of a person suffering from a skin disease. What type of network is formed? Which communication media out of Coaxial cable, Optical fiber, Bluetooth, Satellite link should be used to transfer the file? State reason why Star topology requires more cable length than Bus 016 topology. 55 Open Source Software developers work for the good of 016 Community. Is this statement true? Give reason. 56 What happens during Domain Name Resolution? How is Denial of service attack, a threat to Network security? Identify odd one out of the following: Optical Fiber / Coaxial Cable / Bluetooth / Twisted Pair Cable. Give reason for your answer How is it easier to diagnose fault in Star topology than in Bus topology? What is the purpose of logical address of computer? 017 0

21 61 Does Open source software only mean that the software is free of cost? Give reason for your answer. 6 Which of the following are valid IP addresses? Give reason(s) if invalid. i) ii) iii) iv) Question bank JAVA 1 While working in Netbeans, Ms Kanta Surbhi wants to display 'Cleared' orreattempt required' message depending the marks entered in jtextfield.help her to choose more appropriate statement out of 'If statement' and 'Switch statement'. 1( 01) Write a statement to make jtextarea1 as un-editable. 1( 01) 3 Which HTML tags are used for making a table and adding rows in a HTML document? 1( 01) 4 How is <UL> tag different from <OL> tag of HTML? 1( 01) 5 What will be the value of A and B after execution of the following code: ( 01) int A = 100, B ; for (B=10; B<=1; B++) A+=B; JOptionPane. showmessagedialog (this, A: +A+ B: +B+ ) ; 6 Define data encapsulation with reference to Object Oriented Programming. 1( 01) 7.Name the method is used to extract value of index while using ListBox in Java. 1( 01) 8. What is the difference between the use of isselected and setselected methods used with Jcheckbox in Java. ( 013) 1

22 9. Name any two commonly used methods of JComboBox control? ( 013) 10. What is button group and which control is used with button group? ( 014) 11. Distinguish between / and % operator. ( 014) 1.Which property of Listbox is used to display values in the List. ( 014) 13What will be displayed in jtextareal after the execution of the following loop? for (int f=5, I<=5; I+=5) jtextarea1. settext.(j TextAreal. gettext()+ +Integer.toString(*I) ) ; ( 014) 14.Write the value of the of t after execution of following code. ( 015) Int t; Int s; S=6; t=(8*s++)%7; Q.15 In a switch statement what is the purpose of break statement. ( 015) Q.16Write a Java code to assign value 70 to the variable Y Then decrease the values of Y by 5 and store its value in Z. ( 015) Q.17 What is the difference between SetVisible and Set Enabled Method. ( 016) Q.18 When is If-Else statement preferred over Switch statement. Q.19 Rewrite the following code using While loop. Int sum-0; (for int i=9;i>=1;i--); I%3==0; Sum=sum+I; Else sum=sum I; Q0 The following code has some error(s). Rewrite the correct code underlining all the corrections made. ( 015) int written, interview; written = Integer.parseInt(jTextField1.getText()); interview = Integer.parseInt(jTextField.getText()); if (written <80) OR (interview <15) System.out.println(Not selected); Else; System.out.println( Selected ); Q.1 How many times will the following loop execute : ( 015) int z = 7, sum = 0; do sum = sum + z; z = z+; system.out.println( +z);

23 while (z <=1); Q. Rewrite the following program code using IF ELSE IF instead of SWITCH statement. String rem; int code = Integer.parseInt(jTextField1.getText() ); Switch (code) case 1 : rem = Classes start on 8 th April ; break; case : rem = Classes start on 10 th April ; break; case 3 : rem = Classes start on 1 th April ; break; default : rem = Contact Admin Office ; Q.3 Write the values of sum and t after execution of the following code : ( 015) int sum,t; sum = 7; t = 3; sum = sum + (++t); Q.4 What will be the contents of jtextfield1 and jtextfield after executing the following code : ( 015) String s = Best ; String r = Luck ; String z; Z = r.concat(s); jtextfield1.settext(z); jtextfield.settext(r.touppercase()); Q.5 Write the value that will be assigned to variable x after executing the following statement. ( 016) X=0-5+30/5; Q.6 Consider the statement Choice= Y ; What is the datatype of variable choice? Write a JAVA statement to declare the variable choice. ( 017) Q.7 While working in Netbeans IDE,Amit wants that the text in a Text in a Text area should move to the next line without breaking the word. Which properties would help him to do that? ( 017) 3

24 Q.8 Write a JAVA statement to Append a string ABC to the next line without breaking the word. Which properties would help him to do that? ( 017) Q.9 Rewrite the following code using if else if statement instead of switch ( 017) Switch (success) Case -1 : x1= NO result ; Break; Case 0: x1= Final result- Not Sucessful ; Break; Default : x1 = result not known ; Break; Q.30 Write the values of r and s after the execution of the following code: ( 017) Int p=11; Int q =1; Int r ; Inr s; r =q++; s = P++; r++; 4