CBSE Class 11 Computer Science Worksheet Set H Solved

1. What do you understand by an array? What is the need for arrays? 

2. How are strings manipulated in C++? Support your answer with an example. 

3. Consider the following array declaration:
int X[5][50];
i) Find the number of elements in the array.
ii) Find the total number of bytes required to store the array.

4. What output does the following code fragment produce:
int stock[ ]={10, 22,15,12, 18};
int total = 0;
for(int i=0 ; i < 5; ++i)
if(stock[i] > 15)
total += stock[i];
cout<< “Total= ” <
5. Write a program to accept an array of „n‟ integers. Accept another integer from the user and
check whether that integer is present in the array or not and display proper message.

6. Write a program to accept 10 integers to an array. Sort the array elements in ascending order and display the sorted array.

7. Write a program to accept a square matrix A of size m x m of integers and display the diagonal elements of the matrix in the matrix form.

8. Write a program to accept a matrix A of size m x n of integers. Interchange the first and last row elements of matrix A and display the resultant matrix.

9. Write a program to accept 5 strings, reverse and store each string in the same array and display the resultant strings

VALUE POINTS 

1. *An array is the collection of variables of the same type that are referenced by a common name. 
*Need - It Reduces the number of variables.
e.g. To store the total marks of 40 students we use 40 different variables. Instead , a single array of name total with size 40 can be used for the same purpose.
Thus, reducing the need for declaring and using 39 variables.

2. A String is a set of one or more characters which ends with a special
character null character (\0)
char S[10]; 
S can hold maximum 9 characters and a null character.
e.g.

If S contains the string “ISM” the above representation holds good.

3. i) 250 elements 
ii) 250*2= 500 bytes

4. Total = 40

2 marks for correct output

5. for declaration & input statements -½ mark
for correct logic 
for displaying

6. for declaration & input statements 
for correct logic 
for displaying 

7. for declaration & input statements 
for correct logic 
for displaying
               
8. for declaration & input statements -½ mark
for correct logic 
for displaying 

9. for declaration & input statements 
for correct logic
for displaying

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