KENDRIYA VIDYALAYA SANGATHAN(PATNA REGION) CLASS XII SAMPLE PAPER BOARD EXAMINATION

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1 KENDRIYA VIDYALAYA SANGATHAN(PATNA REGION) CLASS XII SAMPLE PAPER BOARD EXAMINATION 0-5 Time Allotted: Hrs. Subjet: COMPUTER SCIENCE Max. Marks: 70 a Differentiate between Call by value and Call by referene? b Identify the header files needed for the suessfully exeution of following ode stati int i; har W[]= Exam ; while(w[i]) out<<w[i]; if(w[i]== x ) break; else strpy(w, Expert ); i++; Rewrite the following program after removing syntatial error(s) if any. Underline eah orretion. #inlude= iostream.h lass MEMBER int Mno; float Fees; PUBLIC: void Register ( ) in>>mno>>fees; void Display( ) out<<mno<<" : "<<Fees<<endl; ; MEMBER d; Register(); d.display(); d Give the output of the following program segment (Assuming all required header files are inluded in the program): har *NAME= Wonderful! ; for(int x=0;x<strlen(name);x++) if(islower(name[x])) NAME[x]=toupper(NAME[x]); else if(isupper(name[x])) if(x%!=0) NAME[x]=tolower(NAME[x-]); else NAME[x]--; out<<name<<endl;

2 e f What will be the output of the following program: #inlude<iostream.h> #inlude<type.h> #inlude<onio.h> #inlude<string.h> void ChangeMe(har Text[], int &Counter) har *Ptr = Text; int Length = strlen (Text); for ( ;Counter<Length-; Counter+=, Ptr++) *(Ptr + Counter) = toupper( * (Ptr + Counter) ); lrsr(); int P = 0; har M[] = Lets Do It ; ChangeMe (M,P); <<P; Observe the following program and find out, whih option or options out of (i) to (iv) will not be expeted output(s) from the program? What will be the minimum and the maximum value assigned to the variable sequene, when the value of C is? #inlude<iostream.h> #inlude<stdlib.h> int sequene, selet[]=5,90,0,5; randomize(); for(int =0;<;++) sequene=random(-); out<<selet[ ; (i) (ii) (iii) (iv) 5@90@0@5@ 90@5@90@5@ 0@0@5@5@ 0@0@90@5@

3 a What do you mean by Polymorphism? Give one example. b Answer the questions (i) and (ii) after going through the following lass. lass Maths har Chapter [0]; int Marks; publi: Maths (int x, har h[ ]) // Member Funtion Math (Math & A) //Member Funtion ; (i) Complete the definitions of Member Funtion and Member Funtion in the above example. (ii) How would Member Funtion and Member Funtion get exeuted? Define a lass Taxpayer, whose lass desription is given below:- Private Members:- int pan - to store the personal aount no. har name[0] - to store the name float taxablein - to store the total annual taxable inome. float tax - to store the tax that is alulated. void omputetax ( )- A funtion to ompute tax from the following rule:- Total Annual Taxable Inome Rate of Taxation Up to % > and <= % Above but upto % Above % Publi Members :- void inputdata ( ) - A funtion to enter the data and all the omputetax( ) funtion. void display( ) - To display the data. (Example of alulating Tax: if taxable inome is then tax should be 7500.)

4 d Answer the questions (i) to (iv) based on the following: lass loth har ategory [5]; har desription [5]; proteted : float prie; publi : void enterloth ( ); void displayloth ( ); ; lass design : proteted loth har design []; proteted : float ost; publi: int design; design ( ) void enterdesign ( ); void dispdesign ( ); ; lass osting : publi loth float desingfee; float stihing; float al_p ( ); proteted: float ostprie; float sellprie; publi: void enterost ( ); void dispost ( ); osting ( ); ; (i) Write the names of data members whih are aessible from objets belonging to lass loth. (ii) Write the names of all members whih are aessible from objets belonging to lass design. (iii) Write the names of all the data members whih are aessible from member funtions of lass osting. (iv) How many bytes will be required by an objet belonging to lass design?

5 a Write a funtion in C++ whih aepts an integer array and its size as arguments and arrange all the odd numbers in the first row and even numbers in the seond row of a two dimensional array as follows. The unused ells of two dimensional array must be filled with 0. e.g. If the array is,,,, 5, 6 The resultant -D array is given below b A -d array defined as A[..7, -..] requires words of storage spae for eah element stored in row major order. Calulate the address of A[7,0] and base address if the loation of A[6,] as 6. Consider the following struture, Write the definition of funtion PUSH( ), to insert a new node in the stak and definitions of funtion POP(), to delete a node from the stak. strut Library int id; har name[0]; Library *Link; ; Prototype of PUSH() funtion is : void PUSH(int,har []); Prototype of POP() funtion : int POP(); d Write a funtion in C++ whih aepts a D array of integers and its size as arguments and display the elements whih lie on diagonals. [Assuming the D array to be a square matrix with odd dimension, i.e., x, 5x5, et..] Example, if the array ontents is Output should be : Diagonal One : Diagonal Two: 7 e Convert the expression (TRUE &&! FALSE) (FALSE && TRUE) to postfix expression. Show the ontents of the stak at every step. a Observe the program segment given below arefully and answer the question that follows : lass shool private : har name[5]; int numstu; publi: void inshool( ); void outshool( ); int retnumstu( ) return numstu; ; 5

6 void modify(shool A) fstream INOUT; INOUT.open( shool.dat,ios::binary ios::in ios::ate); shool B; int reread=0, found=0; while(!found && INOUT.read((har*)&B,sizeof(B)) reread++; if(a.retnumstu( )= = B.retnumstu( )) //missing statement INOUT.write((har*)&A,sizeof(A)); Found=; else INOUT.write((har*)&B,sizeof(B)); if(!found) out<< \nreord for modifiation does not exist ; INOUT.lose( ); If the funtion modify( ) is supposed to modify a reord in file shool.dat with the values of shool A passed to its argument, write the appropriate statement for missing statement using seekp( ) or seekg( ), whihever needed, in the above ode that would write the modified reord at its proper plae. b Assume a text file Life.txt is already reated. Create a C++ funtion to ount the number of words having first harater apital in Life.txt. Example: Life is one big road with lots of signs. So when you riding through the ruts, don't ompliate your mind. Flee from hate, mishief and jealousy. Don't bury your thoughts, put your vision to reality. Wake Up and Live! Output will be : Total words are 7 Write a funtion to delete a reord on the given model number for a TV from the binary file TV.DAT ontaining the objets of TV (as defined below) : lass TV long model; float size; har brand[0],omp[0]; publi: long retmodel( ) return model; void Input( ) in>>model>>size; gets(brand); gets(omp); void Output( ) out<<model<<size<<brand<<omp<<endl; ; 6

7 5 a Consider the following relation sheme: professor(pode, pname, deptname,salary) Use Relation algebra & write statements for the following: (i) To display professor name who are working in Computer Siene department (ii) To display reords of professors who are getting salary more than b Consider the following tables Client and Bill. Table : Client Cust_Id Cust_Name Address Phone_no City C007 Pritam Sharma,M.G Road 7750 Bangalore C008 Sutopa / Pritam Pura 0689 Delhi C00 Anurag Basu 5A, Park Road 689 Kolkata C0 Hrithik 7/ Vasant Kunj 699 Delhi C0 Firoz Shah, Servamali road 509 Bangalore C05 Vinod Nagpal 6-a Navi Mumbai 609 Mumbai C07 Sameer,Dwarka 069 Delhi C00 Pasunjit Bose 6/A K.G Marg 700 Bangalore C05 Aamina Begum /A Versova 68 Mumbai Table : BILL Ord_id Cust_id Item Ord_date Qty Prie 700 C007 Pizza C0 Garli Bread C0 Pasta C00 Ie Cream C05 Pizza C05 Garli Bread C0 Brownie C0 Ie Cream C00 Pizza Write SQL queries for the following statements (i) Display a report ontaining ust_id, ust_name, Item,qty,prie and bill amount. Bill amount is alulated as the sum of qty*prie (ii) Display how many ustomers have ordered Pizza in the month of Marh. (iii) Count the number of ustomer who have ordered item worth more than 700. Total amount = sum of qty* prie (iv) Display the name of ustomer along with their ity in alphabetial order of ity. Give outputs for following SQL queries (based on above mentioned Client and Bill tables) (i) selet Cust_name, City, ord_date from Client A, Bill b Where A.Cust_id =b.cust_id; (ii) selet Cust_name from Client where Cust_id=( Selet Cust_id from Bill where Year(ord_date) =006) (iii) selet City,ount(*) from Client group by City; (iv) selet Distint (Item) from Bill; 7

8 6 a State and verify Absorption Laws. b Draw a iruit diagram for the following Boolean funtion F = P. ( Q + P ) + Q. P Write the Canonial Produt of Sum for funtion F(X,Y,Z)= π (,,6,7) and Canonial Sum of Produt for funtion F(A,B,C)= (,5,6,7) d Minimize the following Boolean funtion using K-Map. F(a,b,,d) = (0,,,,5,7,8,9,,,,5) 7 a Whih of the following protool is used for sending and reeiving ? (i)rtps (ii)smtp (iii)http (iv)https b Whih of the following units measures the speed with whih data an be transmitted from one node to another node of a network? Also, give the expansion of the suggested unit. (i) KMph (ii) Mbps (iii) MGps What is the differene between paket & message swithing? d Expand the following: (i) FTP (ii) SMS e Indian Publi Shool in Darjeeling is setting up the network between the different wings. There are wings names as Senior(S), Junior(J), Admin(A) and Hostel(H). Distane between various wings Wing A to Wing S 00m Wing A 0 Wing A to Wing J 00m Wing S 00 Wing A to Wing H 00m Wing J 00 Wing S to Wing J 00m Wing H 50 Wing S to Wing H 00m Wing J to Wing H 50m i) Suggest a suitable Topology for Networking the omputer of all wings ii) Name the wing where the server is to be installed. Justify your answer. iii) Suggest the plaement of Hub/Swith in the network. iv) Mention an eonomi tehnology to provide internet aessibility to all wings. f What do you mean by spam? g What do you mean by FLOSS? 8

SAMPLE PAPER 2015 SUB - COMPUTER SCIENCE - (Theory) CLASS XII Time allowed: 3 hours Maximum marks: 70

SAMPLE PAPER 2015 SUB - COMPUTER SCIENCE - (Theory) CLASS XII Time allowed: 3 hours Maximum marks: 70 SAMPLE PAPER 215 SUB - COMPUTER SCIENCE - (Theory) CLASS XII Time allowed: 3 hours Maximum marks: 7 Instructions : i) All the questions are compulsory. ii) Programming Language (for Q. 1-4): C++ iii) Write