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CBSE Class 11 Pre Board 2019 : Computer Science (St Xavier's Sr. Sec. School, Delhi)

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Annual Examination in COMPUTER SCIENCE Std. 11 28-2-2019 Time : 3 hrs. Max. Marks : 70 1. Write any two differences between each of the following [10] a) char array and array of strings b) Normal array and unsized arrays c) Arrays and structures d) strcmp( ) and strcpy( ) f) cout and puts( ) 2. a) Write two limitations of 2D unisized array. [1] b) Write declarations for the following:[1] I. Array to store all houses names (eg. Tagore, Gandhi etc..) II. Array to store first five elements of Fibonacci series. c) Write headers files for built in function given below:[3] i) cos( ) ii) toupper( ) iii) strcpy( ) iv) exit(0) v) randomize( ) vi) setprescision( ) d) How does c++ view string as? Which character marks end of the string? [1] e) Write one drawback of random( ) function? How you will remove this drawback? [1] f) Find total no of bytes required to store each of the following array. [1] i) char S[3+5][40]; ii) float f[10][30-5]; g) Write maximum number of elements 1D array and 2D array can hold. [1] h) What will be the value of the components of given arrays. [3] i) float sal[2]={7899.00}; ii) char S[2] ={ D }; iii) int D[ ][2]={88.5}; i) What is the size of the array: int data[] = { 12, 34, 9, 0, -62, 88 }; [1] j) How many rows are there in the given array: float S[ ][2] ={ 2,3,5,6,78.5}; [1] 3 Underline and correct the errors in the given program segements. a) void main( ) { clrscr( ); float a[10.0]; char s[4][ ]= Hi ; int a{c}; for(i=0; i=5; i++) cin>>a; get(s); } b) void main() { struct student( ) { char name[25]; int age=17; int roll=4; } Student stud; Strcpy(stud.name, Haris ); age=17; cout<<name; cout << age.stud; } 4. Write the output of the following. a) void main( ) {char x[ ] = InFOrMAtIOn ; int i=0; while( x[i] != \0 ) {if (i%2 = = 1) x[i] = tolower(x[i]); else x[i]= * ; i++; } cout<<x; } Std. 11 -2- [3] [3] [2] COMPUTER SCIENCE b) void main () { char serial[] = {'E', 'X', 'A', 'M'}; int number[] = { 69, 66, 67, 68}; randomize(); cout << number[random(3)]; for (int i = 0; i < 4; i++) cout << serial[2+ random(2) - 1 ]; } outputs: (i) 66AAXA (ii) 67AAAM (iii) 67XXAX (iv) 69AXXA c) Write output : int ar[3], x=1,y=2,z=3; for( i=0; i<3; i++) { if( (x++ *y>z--)&&!(x+z==10)||(z%2+5<x/5) ) ar[i]= x++ *y; else ar[i]= z%2+5; cout<<ar[i]; } d) Write output #include <iostream.h> struct Game { char Magic[20]; int Score; }; void main() { Game M={ Tiger , 500}; M.Magic[4]= P ; M.Magic [2]= L ; M.Score+=50; cout<<M.Magic<<M.Score<<endl; Game N=M; N.Magic[0]= A ; N.Magic[3]= J ; N.Score-=120; cout<<N.Magic<<N.Score<<endl; } [2] [2] [2] 5. a) A double non-C++ type array A [-10 to 20[15] is stored in the memory along with Row. Find out the base address and address of the element Array[2][3] if the element Array[4][5] is stored at the address 1000. [3] b) An array M[-3 .. 18][-8 .. 37] is stored in the memory along the column with each of its element occupying 8 bytes. Find the address of element M[2][5] if the element M[5][10] is stored at the address 4000. [3] 6. a) Write program to find sum of squares of elements in both non-diagonals of square matrix having 3 rows and 3 columns. [3] e.g. 22 + 42 +82 + 102 = 184 b) Write a program in C++ which inputs an integer array of n numbers and prints the output (using nested loops) in following format: [3] Example : if the array is having 12459 Std. 11 -3- COMPUTER SCIENCE Then the output should be 1 22 4444 55555 999999999 c) Write a program to input a string, starting position and number of characters from the user. Print the substring from the inputted string. [2] d) Write a program to create a structure named employee with following details [4] - code of integer type - Name of string type - Salary of float type input the details of 5 employees in an array and print the details of only those employees whose salary is greater than 45000. e) Write a program that defines and inputs a floating point array with total 10 elements. Search for an element using Binary search technique. [4] f) Write a program in C++ which inputs a 2D array of integers having 4 rows and 4 columns and display the elements whose last digit is 4. [4] If 2D array is 129 3 9 14 2 25 146 1431 1924 32 45 327 11 455 28 18 Output is : - 14 1924 g) Write a program to input an integer number and check whether it is a palindrome or not. For example the number 121 is a palindrome as it reads the same from left to right and from right to left. [3] h) Write a program to input names of 10 students in a 2D array and their marks also in 1D array. Print the details of only those students whose names starts with S and marks are greater than 90. [3] -x-x-x-x-x-x-x-

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