To find out if you are eligible, you need to:
1. Specify the exam: What profession are you seeking licensure in (e.g., medicine, engineering, law, teaching)? The requirements will vary drastically.
2. Specify the location: Where do you intend to take the exam (e.g., United States, Canada, Australia, China)? Each country and even each state/province has its own rules.
3. Check the requirements: Visit the official website of the licensing board or regulatory body for that profession and location. They will have explicit details on eligibility criteria, including citizenship or residency requirements, educational qualifications, and any other prerequisites.
In short, your nationality is only one factor. The eligibility requirements are much broader and must be examined carefully based on your specific circumstances.