Answer:
Recursion is calling of a function from within that same function
<span>It is a logical, systematic search for the source of a problem in order to solve it, and make the product or process operational again.Troubleshooting is needed to identify the symptoms. ...Troubleshooting is the process of isolating the specific cause or causes of the symptom.</span>
Algorithm is part of computer science. You an learn it on Khan academy. (you probably werent looking for this but no one was answering)
