GREENFIELDS PUBLIC SCHOOL HOLIDAY HOMEWORK- COMPUTER SCIENCE SESSION CLASS - XII STRUCTURED QUERY LANGUAGE

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1 GREENFIELDS PUBLIC SCHOOL HOLIDAY HOMEWORK- COMPUTER SCIENCE SESSION CLASS - XII STRUCTURED QUERY LANGUAGE 1. Write SQL Command for (a) to (d) and output of (g) TABLE : GRADUATE SNO NAME STIPEND SUBJECT AVERAGE DIV 1 KARAN 400 PHYSICS 68 I 2 DIWAKAR 450 COMP. Sc. 68 I 3 DIVYA 300 CHEMISTRY 62 I 4 REKHA 350 PHYSICS 63 I 5 ARJUN 500 MATHS 70 I 6 SABINA 400 CEHMISTRY 55 II 7 JOHN 250 PHYSICS 64 I 8 ROBERT 450 MATHS 68 I 9 RUBINA 500 COMP. Sc. 62 I 10 VIKAS 400 MATHS 57 II (I) Write SQL commands for the following statements: i. List the names of those students who have obtained DIV I sorted by NAME. ii. Display a report, listing NAME, STIPEND, SUBJECT and amount of stipend received in a year assuming that the STIPEND is paid every iii. month. To count the number of students who are either PHYSICS or COMPUTER SC graduates. iv. To insert a new row in the GRADUATE table: 11, KAJOL, 300, computer sc, 75, 1 (II) Give the output of the following SQL queries: v. Select MIN(AVERAGE) from GRADUATE where SUBJECT= PHYSICS ; vi. Select SUM(STIPEND) from GRADUATE WHERE div=2; vii. Select AVG(STIPEND) from GRADUATE where AVERAGE>=65; viii. Select COUNT(distinct SUBJECT) from GRADUATE; 2. Write SQL queries for (i) to (iv) and find outputs for SQL queries (v) to (viii), which are based on the tables. Table: VEHICLE CODE VTYPE PERKM 101 VOLVO BUS AC DELUXE BUS ORDINARY BUS SUV CAR 20 Note: PERKM is Freight Charges per kilometer VTYPE is Vehicle Type -1-

2 Table: TRAVEL NO NAME TDATE KM CODE NOP 101 Janish Kin Vedika Sahai Tarun Ram John Fen Ahmed Khan Raveena Kripal Anya Note: NO is Traveler Number KM is Kilometer travelled NOP is number of travelers travelled in vehicle TDATE is Travel Date (I) Write SQL commands for the following statements: (i) To display NO, NAME, TDATE from the table TRAVEL in descending order of NO. (ii) To display the NAME of all the travelers from the table TRAVEL who are travelling by vehicle with code 101 or 102. (iii) To display the NO and NAME of those travelers from the table TRAVEL who travelled between and (iv) To display all the details from table TRAVEL for the travelers, who have travelled distance more than 100 KM in ascending order of NOP. (II) Give the output of the following SQL queries: (v) SELECT COUNT (*), CODE FROM TRAVEL GROUP BY CODE HAVING COUNT(*)>1; (vi) SELECT DISTINCT CODE FROM TRAVEL; (i) SELECT A.CODE,NAME,VTYPE FROM TRAVEL A,VEHICLE B WHERE A.CODE=B.CODE AND KM<90; (ii) SELECT NAME,KM*PERKM FROM TRAVEL A, VEHICLE B WHERE A.CODE=B.CODE AND A.CODE= 105 ; 3. Consider the following WORKERS and DESIG. Write SQL commands for the statements (i) to (iv) and give outputs for SQL queries (v) to (vi): WORKERS W_ID FIRSTNAME LASTNAME ADDRESS CITY 102 Sam Tones 33 Elm St. Paris 105 Sarah Ackerman 440 U.S. 110 New York 144 Manila Sengupta 24 Friends Street New Delhi 210 George Smith 83 First Street Howard 255 Mary Jones 842 Vine Ave. Losantiville 300 Robert Samuel 9 Fifth Cross Washington 335 Henry Williams 12 Moore Street Boston 403 Ronny Lee 121 Harrison St New York 451 Pat Thompson 11 Red Road Paris -2-

3 DESIG W_ID SALARY BENEFITS DESIGNATION Manager Director Manager Manager Clerk Clerk Clerk Salesman Salesman (I) Write SQL commands for the following statements: (i) To display the content of workers table in ascending order of first name. (ii) To display the FIRSTNAME, CITY and TOTAL SALARY of all Clerks from the tables workers and design, where TOTAL SALARY = SALARY + BENEFITS. (iii) To display the minimum SALARY among Managers and Clerks from the table DESIG. (iv) Increase the BENEFITS of all Salesmen by 10% in table DESIG. (II) Give the output of the following SQL queries: (v) SELECT FIRSTNAME, SALARY FROM WORKERS, DESIG WHERE DESIGNATION = Manager AND WORKERS.W_ID = DESIG.W_ID; (vi) SELECT DESIGNATION, SUM(SALARY) FROM DESIG GROUP BY DESIGNATION HAVING COUNT(*)>=2 ; 4. Consider the following DEPT and WORKER tables. Write SQL queries for (i) to (iv) and find outputs for SQL queries (v) to (viii): Table: DEPT DCODE DEPARTMENT CITY D01 MEDIA DELHI D02 MARKETING DELHI D03 INFRASTRUCTURE MUMBAI D05 FINANCE KOLKATA D04 HUMAN RESOURCE MUMBAI Table : WORKER WNO NAME DOJ DOB GENDER DCODE 1001 George K MALE D Ryma Sen FEMALE D Mohitesh MALE D Anil Jha MALE D Manila Sahai FEMALE D R SAHAY MALE D Jaya Priya FEMALE D05 Note: DOJ refers to date of joining and DOB refers to date of Birth of workers. (I) Write SQL commands for the following statements: (i) To display Wno, Name, Gender from the table WORKER in descending order of Wno. (ii) To display the Name of all the FEMALE workers from the table WORKER. -3-

4 (iii) To display the Wno and Name of those workers from the table WORKER who are born between and (iv) To count and display MALE workers who have joined after (II) Give the output of the following SQL queries: (v) SELECT COUNT(*), DCODE FROM WORKER GROUP BY DCODE HAVING COUNT(*)>1; (vi) SELECT DISTINCT DEPARTMENT FROM DEPT; (vii) SELECT NAME, DEPARTMENT, CITY FROM WORKER W,DEPT D WHERE W.DCODE=D.DCODE AND WNO<1003; (viii) SELECT MAX(DOJ), MIN(DOB) FROM WORKER; 5. Consider the following tables Stationary and Consumer. Write SQL commands for the statement (i) to (iv) and output for SQL queries (v) to (viii): Table: Stationary S_ID Company Price GP02 ABC 15 PL01 PQR 5 PL02 XYZ 7 DP01 PQR 6 PL01 XYZ 8 Table: Consumer C_ID ConsumerName Address S_ID 01 Good Learner Delhi PL01 06 Write Well Mumbai GP02 12 Topper Delhi DP01 15 Write & Draw Delhi PL02 16 Motivation Bangalore PL01 (I) Write SQL commands for the following statements: (i) To display the details of those consumers whose Address is Delhi. (ii) To display the details of Stationary whose Price is in the range of 8 to 15. (Both Value included) (iii) To display the ConsumerName, Address from Table Consumer, and Company and Price from table Stationary, with their corresponding matching S_ID. (iv) To increase the Price of all stationary by 2. (II) Give the output of the following SQL queries: (v) SELECT DISTINCT Address FROM Consumer; (vi) SELECT Company, MAX(Price), MIN(Price), COUNT(*) from Stationary GROUP BY Company; (vii) SELECT Consumer.ConsumerName, Stationary.StationaryName, Stationary.Price FROM Strionary, Consumer WHERE Consumer.S_ID=Stationary.S_ID; (viii) Select StationaryName, Price*3 From Stationary; -4-

5 Boolean Rules: BOOLEAN ALGEBRA 1. State DeMorgan's Law. Verify one of the Demorgan s Laws using truth tables. 2. State Absorption Laws. Verify one of the Absorption Laws using truth tables. 3. Verify X Y + X.Y + X.Y = (X +Y ) using truth table. 4. Verify the following algebraically: (A +B ).(A+B) = A.B +A.B 5. Verify the following using Truth Table: a. X.X = 0 b. X+1 = 1 6. Verify X.Y+X.Y =(X +Y ).(X+Y) algebraically. 7. Prove X'Y + Z = (X' + Y' + Z)(X +Y+Z)(X+Y + Z) algebraically. 8. Prove: X'.Y+Y.Z = X'.Y.Z + X'.Y.Z + X.Y.Z + X'.Y'.Z algebraically. 9. Prove algebraically: X.Y + X.Z +Y.Z = X.Y + X.Z 10. Prove: XY+ YZ + YZ' = Y SOP and POS expressions: 1. Write the dual of the Boolean expression (U+ W). (V'.U + W) 2. Write the dual of the Boolean expression (x+y).(x'+y') 3. Given the following truth table, derive a sum of product (SOP) and Product of Sum (POS) form of Boolean expression from it : A B C F(A,B,C) Write the SOP form of a Boolean Function F, which is represented by the following truth table: A B C F

6 5. Write the POS form of a Boolean Function H, which represented in a truth table as follows: A B C H Convert the following Boolean expression into its equivalent Canonical Product of Sum form: X.Y.Z+X.Y.Z+X.Y.Z 7. Derive the canonical SOP and POS expression for the following: F=(A+B ).(A+C ) 8. Convert the following in canonical POS and SOP expression for the following: a. F(A,B,C)= (0,3,4,7) b. F(X,Y,Z)=π(2,5,6,7) Logic Diagram: 1. Write the equivalent Boolean expression for the following Logic Circuit: 2. Write the equivalent Boolean Expression for the following Logic Circuit: -6-

7 3. Write the equivalent Boolean Expression for the following Logic circuit : 4. Write the equivalent Boolean Expression for the following Logic Circuit. 5. Draw a logical Circuit Diagram for the following Boolean Expression: A.(B+C ) 6. Draw the logic circuit for F=A.B' + C.D' 7. Represent the Boolean expression Y.Z+X.Z with the help of NAND gates only. Minimization of Boolean expression using K-Map: 1. Obtain simplified form for a Boolean expression using Karnaugh Map. F(x,y,z,w) = Σ(1,3, 4, 5, 7, 9,11, 12, 13, 15) 2. If F(a, b, c, d) = Σ(0, 2, 4, 5, 7, 8, 10, 12, 13, 15), obtain the simplified form using K-Map. 3. Obtain a simplified form for the following Boolean Expression using Karnaugh s Map : F(a, b, c, d) = Σ (0, 1, 2, 4, 5, 7, 8, 9, 10, 11, 14) 4. Obtain simplified form for a Boolean expression using K Map: F(x,y,z,w) = Σ(1,3,4,5,7,9,11,12,13,15) 5. Obtain a simplified form for a Boolean expression using K-Map. F(u,v,w,z) = π (0,1, 3, 5, 7, 9,10,11,12, 13,15) 6. Minimize F(w,x,y,z) Karnaugh map: F(w, x, y, z) =Σ(0, 4, 8, 12) 7. Reduce the following Boolean expression using K - Map: F(A, B, C, D) = π(o, 1, 2, 3, 4, 5, 10, 11, 15) 8. Reduce the following Boolean expression using K-Map: F(U,V,W,Z) = Σ (0, 1, 2, 3, 4, 10, 11) 9. Reduce the following Boolean Expression using K-Map: F(P, Q, R, S) = Σ (1, 2, 3, 5, 6, 7, 9, 11, 12, 13, 15) -7-

8 10. Reduce the following Boolean expression using K-map: F(U,V,W,Z)= π (3,5,7,10,11,13,15,) COMMUNICATION AND NETWORKING CONCEPTS Fundamentals of Networking 1. What is the difference between Circuit Switching technique and Packet Switching technique? 2. Define the term Bandwidth. Give unit of Bandwidth. 3. What was the role of ARPANET in Computer Network? 4. What do you understand by a backbone network? 5. Define Packet Switching. 6. Which of the following is not a unit for data transfer rate? a. bps b. abps c. gbps d. kbps 7. Which of the following unit measures the speed with which data can be transmitted from one node to another node of a network? Also, give the expansion of the suggested unit. a. Mbps b. KMph c. MGps 8. Name proprietary software along with their application. 9. Mention any two advantages of Open Source Software over Proprietary Software. Transmission Medium 10. Write one difference between coaxial and optical cable. 11. What is the significance of Cyber law? Network Devices 12. What is the purpose of using a MODEM? Network Protocol 13. What out of following, will you use to have an audio-visual chat with an expert sitting in a faraway place to fix-up a technical issue? a. VoIP b. -8-

9 c. FTP 14. Expand the following terminologies : a. TCP/IP b. FTP 15. What is the purpose of using FTP? 16. What is protocol? Which protocol is used to search information from Internet using the Internet Browser? 17. What is VoIP? Network Topology 18. What is the difference between STAR topology and BUS topology of network? 19. Write two advantages and two disadvantages for STAR topology. 20. Give two advantages and two disadvantages of Tree topologies. 21. Write the two advantages and two disadvantages of Bus Topology in network. Network Terminologies 22. What is the purpose of Telnet? 23. Write the following abbreviations in their full form : a. OSI b. XML c. CDMA 24. Compare freeware and Shareware. Types of Network 25. What is the difference between LAN and MAN? 26. Expand the following terminologies: a. LAN b. WLL 27. What is the difference between WAN and MAN? 28. What is the difference between LAN and WAN? Websites 29. Expand the following terminologies: c. HTML d. XML e. GSM -9-

10 30. Which of the following is not a Client Side script: a. VB Script b. Java Script c. ASP d. PHP 31. Explain the following terms in short : a. URL 32. What is the purpose of using a Web Browser? Name any one commonly used Web Browser. 33. Give suitable example of URL and Domain Name. 34. What are cookies? 35. Name any two common Web browsers. Internet Security 36. Write two application of Cyber Law. 37. Differentiate between Hackers and Crackers. 38. What is the difference between Trojan Horse and Virus in terms of computers? 39. Define the term firewall. 40. Give two major reasons to have network security. 41. If someone has hacked your Website, to whom you lodge the Complain? 42. What term we use for a software/hardware device, which is used to block, unauthorized access while permitting authorized communications. This term is also used for a device or set of devices configured to permit, deny, encrypt, or proxy all (in and out)computer traffic between different security domains based upon a set of rules and other criteria. 43. What do you mean by IP Address? How is it useful in Computer Security? 44. How Trojan Horses are different from Worms? Mention any one difference. 45. What do you mean by Spam Mails? How can you protect your mailbox from Spams? 46. Which of the following will come under Cyber Crime? i. Theft of a brand new sealed pack Laptop ii. Access to a bank account for getting unauthorized Money Transaction iii. Modification in a company data with unauthorized access iv. Photocopying a printed report Case Study -10-

11 1. The Great Brain Organisation has set up its new Branch at Srinagar for its office and web based activities. It has 4 Wings of buildings as shown in the diagram: i. Suggest a most suitable cable layout of connections between the Wings, and topology. ii. Suggest the most suitable place (i.e. Wing) to house the server of this organisation with a suitable reason, with justification iii. Suggest the placement of the following devices with justification: a. Repeater b. Hub/Switch iv. The organization is planning to link its head office situated in Delhi with the offices at Srinagar. Suggest an economic way to connect it; the company is ready to compromise on the speed of connectivity. Justify your answer. 2. UNIVERSITY OF CORRESPONDENCE in Allahabad is setting up the network between its different wings. There are 4 wings named as Science (S), Journalism (J), ARTS (A) and Home Science (H). i. Suggest a suitable topology for networking the computer of all wings. ii. Name the wing where the Server to be installed. Justify your answer. iii. Suggest the placement of Hub/Switch in the network. iv. Mention an economic technology to provide internet accessibility to all wings. 3. INDIAN PUBLIC SCHOOL in Darjeeling is setting up the network between its different wings. There are 4 wings named as SENIOR(S), JUNIOR(J), ADMIN(A) and HOSTELCH). -11-

i. Suggest a suitable topology for networking the computer of all wings. ii. Name the wing where the Server to be installed. Justify your answer. iii.

12 i. Suggest a suitable topology for networking the computer of all wings. ii. Name the wing where the Server to be installed. Justify your answer. iii. Suggest the placement of Hub/Switch in the network. iv. Mention an economic technology to provide internet accessibility to all wings. 4. Hindustan Connecting World Association is planning to start their offices in four major cities in India to provide regional IT infrastructure support in the field of Education & Culture. The company has planned to set up their head office in New Delhi in three locations and have named their New Delhi offices as Sales Office, Head Office and Tech Office. The company s regional offices are located at Coimbatore, Kolkata and Ahmedabad. A rough layout of the same is as follows i. Suggest network type (out of LAN, MAN, WAN) for connecting each of the following set of their offices: Head Office and Tech Office Head Office and Coimbatore Office ii. Which device will you suggest to be procured by the company for connecting all the computers within each of, their offices out of the following devices? Modem Telephone Switch/Hub -12-

13 iii. iv. Which of the following communication media, will you suggest to be procured by the company for connecting their local offices in New Delhi for very effective and fast communication? Ethernet Cable Optical Fiber Telephone Cable Suggest a cable/wiring layout for connecting the company s local offices located in New Delhi. Also,, suggest an effective method/technology for connecting the company s regional offices at Kolkata, Coimbatore and Ahmedabad. 5. Bhartiya Connectivity Association is planning to spread their offices in four major cities in India to provide regional IT infrastructure support in the field of Education & Culture. The company has planned to setup their head office in New Delhi in three locations and have named their New Delhi offices as Front Office, Back Office and Work Office. The company has three more regional offices as South Office, East Office and West Office located in other three major cities of India. A rough layout of the same is as follows: i. Suggest network type (out of LAN, MAN, WAN) for connecting each of the following set of their offices : Back Office and Work Office Back Office and South Office ii. Which device you will suggest to be procured by the company for connecting all the computers with in each of their offices out of the following devices? Switch/Hub Modem -13-

14 iii. iv. Telephone Which of the following communication medium, you will suggest to be procured by the company for connecting their local offices in New Delhi for very effective and fast communication? Telephone Cable Optical Fiber Ethernet Cable Suggest a cable/wiring layout for connecting the company s local offices located in New Delhi. Also, suggest an effective method/technology for connecting the company s regional offices- East Office, West Office and South Office with offices located in New Delhi. -14-

(Structured Query Language)

(Structured Query Language) KENDRIYA VIDYALAYA HALDWANI 2 ND SHIFT CLASS XII SESSION 2016-17 DATABASE CONCEPTS, SQL ISSUED DATE: 12.05.2016 SUBMITTED DATE: 24.06.2016 ==============================================================================