Unfortunately, I couldn't find the JNU MPhil/PhD entrance exam paper for Korean for the years 2015-2017 on the JNU website. This could be due to a few reasons:

1. Limited Availability: JNU might not have made older question papers publicly accessible.
2. Website Changes: The structure or organization of the JNU website might have changed over time, making it difficult to locate specific resources.

Here are some alternative approaches you can try:

1. Contact JNU Directly: Reach out to the Department of Korean Studies at JNU and inquire about the availability of previous year's question papers. They might be able to provide you with a copy or direct you to a specific resource.
2. Check Online Forums and Communities: There might be online forums or communities dedicated to JNU or Korean studies where students share resources and information. Look for posts or discussions related to the entrance exam and see if anyone has shared the question papers.
3. Search for Third-Party Resources: Some educational websites or platforms might have collections of previous year's question papers from various universities. Try searching for "JNU MPhil/PhD Korean entrance exam papers" on these platforms.

Remember: While finding the exact question papers for 2015-2017 might be challenging, practicing with previous year's papers from other years can still be beneficial. It can give you an idea of the exam pattern, types of questions, and the level of difficulty.