This could be problem faced by anyone who wishes to take up an online course and faces several choices.
Finding those who have certifications from these courses wouldn't be an issue as they are obtained for publicizing; they can be found easily on Linkedin and other social media platforms.
But, finding whether they got employed because of the certification or how much value the certificated had in their interview would be the tricky part. Also, employers need to be surveyed to know how much they value those certifications.
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