EXAM
An exam or examination is an official test that shows your knowledge or ability in a
particular subject. Exam is the word most commonly used. Examination is more formal and is used mainly in written English.
Certification
A certification is a credential that you earn to show that you have specific skills or knowledge. They are usually tied to an occupation, technology, or industry. Certifications are usually offered by a professional organization or a company that specializes in a particular field or technology.
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