User registration: both captchas and email confirmation?

Question

Consider a new website in development where it requires users to register for service.

Many sites require confirmation by e-mail and by entering the user captcha s. What is the use of both of these devices?

If there is an email check on the site, is an email confirmation required?

Answer 1

CAPTCHA tells you that the registered real person, in contrast to the "bot".

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Answer 2

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Answer 3

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Answer 5

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Answer 6

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