Question

what is captcha

Answer 1

EH.

Answer 2

what

Answer 3

https://en.wikipedia.org/wiki/CAPTCHA

Answer 4

Captcha is one type of code . When you going to sign up or log in for a site you can see some twisting letters in a box and then we have to type those letter correctly to sign up . These twisting letters are called CAPTCHA . @musaif

Answer 5

When you signed up to OpenStudy, you had to solve a CAPTCHA to prove you weren't a robot making spam accounts :P

Answer 6

"A CAPTCHA (an acronym for "Completely Automated Public Turing test to tell Computers and Humans Apart") is a type of challenge-response test used in computing to determine whether or not the user is human."

This simply to protect your account.

Answer 7

exactly @thesmartone CAPTCHA code distinguish between human and robot . Robot can't read that code :D