C: Difference between random number generator and pseudo random number generator ?

Question

"Given an array of strings, find the string which is made up of maximum number of other strings contained in the same array. e.g. “rat”, ”cat”, “abc”, “xyz”, “abcxyz”, “ratcatabc”, “xyzcatratabc” Answer: “xyzcatratabc”

Answer 1

A pseudorandom number generator is an algorithm for generating a sequence of numbers that approximates the properties of random numbers. The sequence is not truly random in that it is completely determined by a relatively small set of initial values, called the PRNG's state, which includes a truly random seed.

Where as A random number generator is an algorithm or physical device designed to generate a sequence of numbers or symbols that lack any pattern, i.e. appear random. In practice hardware random generators are used which generates the number based on a physical process rather then an algo.

Pseudorandom numbers are important in practice for their speed in number generation and their reproducibility.