THE INDIAN COMMUNITY SCHOOL, KUWAIT

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THE INDIAN COMMUNITY SCHOOL, KUWAIT SERIES : I MODEL / 2017-2018 CODE : N 083 TIME ALLOWED : 3 HOURS NAME OF STUDENT : MAX. MARKS : 70 ROLL NO.

1 THE INDIAN COMMUNITY SCHOOL, KUWAIT SERIES : I MODEL / CODE : N 083 TIME ALLOWED : 3 HOURS NAME OF STUDENT : MAX. MARKS : 70 ROLL NO. :.. CLASS/SEC :.. NO. OF PAGES : 10 COMPUTER SCIENCE ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 1) a) Find the correct identifiers out of the following, which can be used for naming Variable, Constants or Functions in a C++ program 2 For, while, INT, NeW, delete, 1stName, Add+Subtract, name1 A) For, INT, NeW, name1 b) Raman suggest Kishan the following header files which are required to be included in the given C++ program. Identify the header files which are wrongly suggested by Raman. Program: 1 void main() char Grade; cin.get(grade); if(isalpha(grade)) cout<<grade; Suggested header files:- 1. iostream.h 2. stdio.h 3. conio.h 4. ctype.h c) Observe the following C++ code very carefully and rewrite it after removing any/all syntactical errors with each correction underlined. 2 Note: Assume all required header files are already being included in the program. #Define float MaxSpeed=60.5; void main()

2 intmyspeed char Alert= N ; cin>>myspeed; ifmyspeed>maxspeed Alert= Y ; cout<<alert<<endline; d) Find the output of the following program: 3 #include<iostream.h> voidswitchover(int A [ ], int N, int Split) for (int K=0 ; K<N; K++) if (K<Split) A(K]+ =K; else A [K]*=K; void Display (int A [ ], int N) for (int K=0 ; K<N ; K++) (K%2==0)? cout<<a[k]<< % :cout<<a(k]<<endl; void main ( ) int H[ ]= 30,40,50,20,10,5; SwitchOver (H, 6, 3); Display (H, 6); e) Write the output of the following C++ program code(assume all necessary header files are included in program. 3 class seminar char topic[30]; int charges; seminar() strcpy(topic,"registration"); charges=5000;

3 seminar(char t[]) strcpy(topic,t); charges=5000; seminar(int c) strcpy(topic,"registration with Discount"); charges=5000-c; void regis(char t[],int c) strcpy(topic,t); charges=charges+c; void regis(int c=2000) charges=charges+c; void subject(char t[],int c) strcpy(topic,t); charges=charges+c; void show() ; void main() seminar s1,s2(1000),s3("genetic Mutation"),s4; s1.show(); s2.show(); s1.subject("ict",2000); s1.show(); s2.regis("cyber Crime",2500); s2.show(); s3.regis(); s3.show(); s4=s2; s4.show(); f) Consider the following C++ program code and choose the option(s) which are not possible as output. Also, print the minimum & maximum value of variable Pick during complete execution of the program.(assume all necessary header files are included in program: 2 const int NUM=5; void main() randomize(); int V1=1,V2=5,Pick; while(v1<v2) Pick=random(NUM)+(V2-V1); cout<<pick<< : ;

4 V1++; (a) 5:6:6:6: (b) 4:7:5:3: (c) 8:6:1:2: (d) 7:5:3:1 2) a) What do you understand by Polymorphism? Also, give an example in C++ to illustrate the same. 2 b) Answer the questions(i) and (ii) after going through the following class: 2 class planet char name[20];char distance[20]; planet() //Function 1 strcpy(name, "Venus"); strcpy(distance,"38 million km"); void display(char na[],char d[]) //Function 2 cout<<na<<"has"<<d<<"distancefromearth"<<endl; planet(char na[], char d[]) //Function 3 strcpy(name,na); strcpy(distance,d); ~planet() //Function 4 cout<<"planetarium time over!!!"<<endl; ; I. What is Function 1 referred as? When will it be executed? II. Write suitable C++ statement to invoke Function 3. c) Define a class DanceAcademy in C++ with following. 4 description: (2017 MP) Private Members Enrollno of type int Name of type string Style of type string Fee of type float A member function chkfee( ) to assign the value of fee variable according to the style entered by the user according to the criteria as given below: Style Fee Classical Western 8000 Freestyle 11000

5 Public Members: A function enrollment() to allow users to enter values for Enrollno,Name, Style and call function chkfee()to assign value of fee variable according to the Style entered by the user. A function display() to allow users to view the details of all the data members. d) Answer the questions (i) to (iv) based on the following: 4 class Interior int OrderId; char Address[20]; protected: float Advance; Interior(); void Book(); void View(); ; class Painting:public Interior int WallArea,ColorCode; protected: char Type; Painting(); void PBook(); void PView(); ; class Billing:public Painting float Charges; void Calculate(); Billing(); void Bill(); void BillPrint(); ; (i) Which type of Inheritance out of the following is illustrated in the above example? Single Level Inheritance Multi Level Inheritance Multiple Inheritance (ii) Write the names of all the data members, which are directly accessible from the member functions of class Painting. (iii) Write the names of all the member functions, which are directly accessible from an object of class Billing. (iv) What will be the order of execution of the constructors, when an object of class Billing is declared? 3) a) Write the definition of function named Array_Swap() that will accept an integer array & its size as arguments and the function will interchange/swap elements in such a way that the first element is swapped with the last element, second element is swapped with the second last element and so on, only if anyone or both the elements are even. 3

6 E.g. if initially array of seven elements is: 5, 16, 1, 7, 19, 8, 2 After execution of the above function, the contents of the array will be: 2,8, 1, 7, 19, 16, 5 b) An array T[50][20] is stored in the memory along the column with each of the elements occupying 4 bytes. Find out the base address and address of element T[30][15], if an element T[25][10] is stored at the memory location c) Consider the following code, which implements passengers Queue for a train. Write the definition of function Insert () to insert a new node in the queue with required information. struct NODE 3 longticketno; charpname[20];//passengers Name NODE * Next; ; classqueueoftrain NODE * Rear, * Front; public : Queueoftrain( ) Rear = NULL; Front = NULL: void Insert( ); void Delete( ); ~Queueoftrain( ); ; d) Write user-defined function AddEnd2(int A[ ][4], int N, int M) in C++ to find and display the sum of all the values which are ending with 3(ie units place is 3). For example if the content of array is The output should be 36 e) Obtain the postfix notation for the following infix notation of expression showing the contents of the stack and postfix expression formed after each step of conversion : 2 4) a) (P Q)/(R*(S T)+U) Fill in the blanks marked as Statement 1 and Statement 2, in the program segment given below with appropriate functions for the required task. 1 class Club long int MNo;//Member Number char MName[20];//Member Name char [30];// of Member void Register( );//Function to register member void Disp( );//Function to display details void Change ( ) //Function to change cout<< Enter Changed ; cin>> ; long int GetMno( ) return MNo; ; void ModifyData( ) fstream File;

7 File.open( CLUB.DAT, ios::binary ios::in ios::out); int Modify=0, Position; long int ModiMno; cout<< Mno Whose required to be modified: ; cin>>modimno; Club CL; while(!modify && File.read((char *)&CL.sizeof(CL))) if(cl.getmno( )==ModiMno) CL.Change ( ); Position=File.tellg( )-sizeof(cl); //Statement 1: To place file pointer to the required position //Statement:To write the object CL on to the binary file Modify++; if(modify) cout<< changed.. <<endl; else cout<< Member not found. <<endl; File.close( ); b) Write a function in C++ to count and display the number of lines not starting with alphabet A present in a text file STORY.TXT. 2 c) Write a definition for function ONOFFER( ) in C++ to read each object of a binary file TOYS.DAT, find and display details of those toys, which has status as ONOFFER. Assume that the file TOYS.DAT is created with the help of objects of class TOYS, which is defined below: 3 class TOYS int TID;char Toy[20],Status[20]; float MRP; void Getinstock() cin>>tid;gets(toy);gets(status);cin>>mrp; void View() cout<<tid<< : <<Toy<< : <<MRP<< : <<Status<<endl; char *SeeOffer()return Status;. ;

8 5) a) Observe the table Club given below: 2 Club Member_id Member_name Address Age Fee M001 Sumit NewDelhi M002 Nisha Mumbai M003 Niharika NewDelhi M004 Sachin Faridabad i. What is the cardinality and degree of the above given table? ii. If a new column contact_no has been added and three more members have joined the club then how these changes will affect the degree and cardinality of the above given table b) Write SQL commands for the queries (i) to (iv) and output for (v) to (viii) based on the tables Watches and Sale given below. Watches Watch_id Watch_name Price Type Qty_Store W001 High Time Unisex 100 W002 Life Time Ladies 150 W003 Wave Gents 200 W004 High Fashion 7000 Unisex 250 W005 Golden Time Gents 100 Sale Watch_id Qty_Sold Quarter W W W W W W W W i. To display all the details of those watches whose name ends with Time. 1 ii. To display watch s name and price of those watches which have price range in between iii. To display total quantity in store of Unisex type watches. 1 iv. To display watch name and their quantity sold in first quarter. 1 v. select watch_name,qty_sold from watches w,sale s where w.watchid=s.watchid and quarter=1; v. select max(price), min(qty_store) from watches; ½ vi. select quarter, sum(qty_sold) from sale group by quarter; ½ vii. select watch_name,price,type from watches w, sale s where w.watchid!=s.watchid; ½ viii. select watch_name, qty_store, sum(qty_sold), qty_store - sum(qty_sold) Stock from watches w, sale s where w.watchid=s.watchid group by s.watchid; ½ 6) a) State and verify De Morgan s law in Boolean algebra. 2

9 b) Derive a Canonical SOP expression for a Boolean function G, represented by the following truth table: 1 A B C G(A,B,C) c) Obtain a simplified form for a Boolean expression: 3 F(U,V,W,Z)=π(0,1,3,5,6,7,10,14,15) d) Represent the Boolean expression (X+Y')Z with the help of NAND gates only. 2 7) a) Which protocol helps us to transfer files to and from a remote computer? 1 b) Kabir wants to purchase a Book online and he has placed the order for that book using an e- commerce website. Now, he is going to pay the amount for that book online using his Mobile, then he needs which of the following to complete the online transaction: A bank account 2. Mobile phone which is attached to above bank account 3. The mobile banking app of the above bank installed on that mobile 4. Login credentials(uid & Pwd) provided by the bank 5. Or all of above. c) Identify the type of topology on the basis of the following: 1 Since every node is directly connected to the server, a large amount of cable is needed which increases the installation cost of the network. d) What is the difference between Virus and Worms in the computers? 1 e) What is the importance of URL in networking? 1 f) Expand: i)jsp ii) GSM 1 g) Xcelencia Edu Services Ltd. is an educational organization. It is planning to set up its India campus at Hyderabad with its head office at Delhi. The Hyderabad campus has 4 main buildings ADMIN, SCIENCE, BUSINESS and MEDIA. You as a network expert have to suggest the best network related solutions for their problems raised in (i) to (iv), keeping in mind the distances between the buildings and other given parameters. HYDERABAD Delhi Head Office ADMIN ARTS SCIENCE BUSINES

10 Distance between various buildings ADMIN to SCIENCE 65m ADMIN to BUSINESS 100m ADMIN to ARTS 60m SCIENCE to BUSINESS 75m SCIENCE to ARTS 60m BUSINESS to ARTS 50m DELHI HEADOFFICE to HYDERABAD 1600km Number of computers installed at various buildings ADMIN 100 SCIENCE 85 BUSINESS 40 ARTS 12 DELHI HEADOFFICE 20 i) Suggest the most appropriate location of the server inside the HYDERABAD campus (out of the 4 buildings), to get the best connectivity for maximum no. of computers. Justify your answer. 1 ii) Suggest and draw the cable layout to efficiently connect various buildings 'within the HYDERABAD campus for connecting the computers. 1 iii) Which hardware device will you suggest to be procured by the company to be installed to protect and control the internet uses within the campus? 1 iv) Which of the following will you suggest to establish the online face to face communication between the people in the Admin Office of HYDERABAD campus and DELHI Head Office? (a) E mail (b) Text Chat (c) Video Conferencing (d) Cable TV 1

11 Class: XII Answer Key Computer Science Max: Marks 70 5) a) For, INT, NeW, name1 2 b) stdio.h and conio.h 1 c) 2 #define MaxSpeed60.5 void main() intmyspeed,maxspeed; char Alert= N ; cin>>myspeed; if(myspeed>maxspeed) Alert= Y ; cout<<alert<<endl; d) 3 30%41 52%60 40%25 e) Registration@500 3 Registration with Discount@4000 ICT@7000 Cyber Crime@6500 Genetic Mutation@7000 Cyber Crime@6500 f) Max: value of pick is 8 and min: value is 4 2 Wrong options : 8:6:1:2 and 5:6:6:6 6) a) Definition - 1 mark Example - 1 mark b) I. Constructor. When the object of the class is created it automatically calls the constructor. 1 II. planet ob1( Mars, 20millionkm ); 1 c) proper definition 4 marks d) i. Multi Level Inheritance 1 ii. Advance, WallArea, ColorCode and Type 1 iii. Bill(), BillPrint(),PBook(),PView(),Book() and View() 1

12 5) iv. Interior, Painting and Billing 1 7) f) Function header- 1 mark Condition - 1 mark printing - 1 mark g) Proper formula - 1 mark Base address calculation mark Element address calculation mark h) proper function definition 3 marks i) proper function definition 2 marks j) PQ-RST-*U+/ 2 8) d) File.seekp(Position); 1 File.write((char*)&CL,sizeof(CL)); e) Proper function definition - 2 marks f) Opening file - 1 mark Reading from file 1 mark Display - 1 mark a) i. cardinality is 4 and degree is 5 2 ii. cardinality will be 7 and degree is 6 b) Write SQL commands for the queries (i) to (iv) and output for (v) to (viii) based on the tables Watches and Sale given below. ix. select * from watches where watch_name like %Time ; 1 x. select Watch_name, price from watches where price between 5000 and ; 1 xi. select sum(qty_store) from Watches group by type having Type= Unisex ; 1 select Watch_name,Qty_Sold from Watches,Sale where Quarter=1 and Watches.Watch_id=sale.Watch_id; 1 iv to vii Correct output ½ mark each 8) a) Law 1 mark Verification 1 mark b) Correct SOP Expression - 1 e) F(U,V,W,Z)=π(0,1,3,5,6,7,10,14,15) 3 Simplifying using K map f) Correct circuit with NAND gates 2 9) a) Correct answer- 1 b) Correct answer - 1 c) Identify the topology: 1 d) Difference 1 e) Importance of URL 1

13 f) Correct Expansion 1 g) i. to iv Corect answer 1 mark each

SAMPLE QUESTION PAPER CLASS-XII, SESSION: SUBJECT: COMPUTER SCIENCE

SAMPLE QUESTION PAPER CLASS-XII, SESSION: 07-8 SUBJECT: COMPUTER SCIENCE Time: hrs Max. Marks: 70 General Instructions: i. All questions are compulsory. ii. Programming language: C++ iii. Database query