CBSE Class 12 Computer Science Revision Worksheet Set 03

Q1. Write a function in C++ that counts the number of words in a long string where each word is separated by atleast one blank space and the string terminates with a period.

Q2. Write a function in C++ to find the sum of the following series:
1+2+3+4+5+6+….. upto N terms.

Q3. Write a function in C++ to find the sum of the following series:
1²+3²+5²+7²+9²+….upto n terms.

Q4. Write a function in C++ to find the sum of the following series:
(1)+(1+2)+(1+2+3)+(1+2+3+4)…. Upto n terms.

Q5. Write a function in C++ to find the sum of the following series:
(2²)+(2²+4²)+(2²+4²+6²)+(2²+4²+6²+8²)…. Upto n terms.

Q6. Write a function in C++ to find the sum of the following series:
1/1²+1/3²+1/5²+1/7²+…upto n terms

Q7. Write a C++ function having two value parameters X and N with result type float to find the sum of series given below:
1+X¹/2! + X²/3!+…..+Xⁿ/(N+1)!

Q8. Write a program to print the truth table for XY + Z.

Q9. Write a C++ function that converts a decimal numbers between 0 to 63 into a 8‐bit binary number and prints the binary equivalent.

Q10. Write a program in C++ to print first 10 multiples of an integer N, where N is to be entered by user.

Q1. What is a parameter? Differentiate between an actual and a formal parameter with an example. Name the different types of formal parameter supported by C++. What type of parameter you must be using when passing an array to a function?

Q2. What is a compiler directive? Why do we need #include in a C++ program? Name the include file, to which following built‐in functions belong to:
(a) strcmp (b) randomize (c) setw() (d) isalnum()
(e) sin() (f) gotoxy()

Q3. Find the syntax error(s),if any, in the following program: 
include<iostream.h>
void main()
{
int R; W=90;
while w>60
{
R=W‐50;
switch(w)
{
20:cout<<”Lower Range”<<endl;
30:cout<<”Middle Range”<<endl;
20: cout<<”Higher Range”<<endl;
}
}
}

Q4. What would be output by the following program:
#include<iostream.h>
void Execute (int &B, int C=100)
{
int TEMP=B+C;
B+=TEMP;
if(C==100)
cout<<TEMP<<B<<C<<endl;
}
void main()
{
int M=90, N=10;
Execute(M);
cout<<M<<N<<endl;
Execute(M,N);
cout<<M<<N<<endl;
}

Q5. Give the output of the following program segment:
void main()
{
char *NAME = “CoMPutER”;
for(int x=0;x<strlen(NAME);x++)
if(islower(NAME[x])))
NAME[x]=toupper(NAME[x]);
else
if(isupper(NAME[x]))
if(X%2==0)
NAME[x]=tolower(NAME[x]);
else
NAME[x]=NAME[x‐1];
puts(NAME);
}