Yes, you can access previous year's question papers for the NDA exam from your mobile phone or tablet. Here's how:

1. Online Platforms:
- There are several online platforms where you can find previous year's question papers for the NDA exam.
- Websites like EduRev offer a wide range of study materials, including NDA question papers.
- You can visit their website and search for NDA question papers to access them on your mobile phone or tablet.

2. Mobile Applications:
- Many educational apps are available for smartphones and tablets that provide access to previous year's question papers for the NDA exam.
- You can search for such apps on the Google Play Store or Apple App Store and download them on your device.
- Once downloaded, you can browse through the app to find NDA question papers and access them easily.

3. PDF Downloads:
- Various websites provide PDF downloads of previous year's NDA question papers.
- You can search for these websites using your mobile phone or tablet's web browser.
- Look for websites that offer free PDF downloads and browse through their collection of NDA question papers.
- Once you find the desired question paper, you can download it and access it from your device's file manager or a PDF reader app.

4. Online Forums and Groups:
- Online forums and social media groups dedicated to the NDA exam often have members who share previous year's question papers.
- You can join these forums or groups using your mobile phone or tablet and search for question papers shared by other members.
- You can either download the question papers directly from the forum or group or ask the members to provide you with the papers.

Remember:
- It is essential to verify the authenticity of the question papers you access online.
- Stick to reliable sources like educational websites, trusted apps, or official NDA websites to ensure the accuracy of the question papers.
- Some websites may require you to create an account or register before accessing the question papers.
- Always prioritize your device's security by downloading files from trusted sources only.

With the availability of various online platforms, mobile applications, PDF downloads, and online forums, accessing previous year's question papers for the NDA exam has become convenient and accessible from your mobile phone or tablet.