A few general Prince/Agile questions. Nothing too taxing, then some more interesting questions that were pseudo technical and more around checking technical understanding. Things like, you're designing a tank, and want it to communicate secretly. How would you do it.
A. Radio. To which they say, the enemy monitors radio. A. Encryption. Questions about key distribution...... And then to about radio location means you can't use radio, what next? So onto directional antenna. Then onto off the wall, passive solutions like semaphore.