C language questions Here you can find most asked and frequent Ignou BCA C language questions and solutions Write a c language interactive program to convert a binary number to its decimal equivalent. Write a C program to count the number of characters in a given string Write a C program, using appropriate user-defined functions and a switch statement to perform addition, subtraction, multiplication and division, if two numbers and choice of the arithmetic operation are given as inputs. Write a C program to calculate Simple Interest (SI) where principal amount, time period and rate of interest are given. Write a C program to calculate the area of an isosceles triangle whose altitude and base are given as inputs.