Question

A captcha is used for verifying if a web user
1) is a machine or a human being
2) is a frequent or infrequent visitor
3) has logged out
4) is a registered user or not

Answer 1

1) is a machine or a human being

Answer 2

A captcha is used for verifying if a web user  

1) is a machine or a human being  ✔✔

2) is a frequent or infrequent visitor  

3) has logged out  

4) is a registered user or not