Now an increasing number of universities and companies offer online certificates which you can earn through their exams or courses. These certificates are indeed useful in your resume. Even if you don't have a degree in that field, you can still prove your knowledge and skills. So here are some of the online certification exams I have found: Microsoft certification exams: https://www.microsoft.com/en-us/learning/exam-list.aspx Oracle certification exams: https://education.oracle.com/oracle-certification-exams-list Google certification exams: https://cloud.google.com/certification MongoDB certification exam: https://university.mongodb.com/certification Cisco certification exams: https://www.cisco.com/c/en/us/training-events/training-certifications/exams.html#~stickynav=1 Amazon Web Services certification exams: https://aws.amazon.com/certification/ Each of these online certification exams barely costs between $100 - $250. They're from the real companies and they send you a certificate once you pass their exams. How about we create a new discussion section for these certification exams? If you're aware of any other useful and affordable online certification exams, let us know!