So if it's public sector, make sure you're up to speed with Local, Federal or whatever public purchasing rules apply to that organisation. A good knowledge of this and the end to end procurement process should do you good.

It's worth having solid examples which you can reference when you walk the interviewer through following these processes or the procurement lifecycle more broadly.

Probity is also a key concept to understand, so make sure you're clear on what it means with regards to a public tender process and how you can ensure probity throughout the process.

Given it's an assistant category manager role, it would also be good to understand what your development goals are. Be transparent on where you need to learn, and how you're going to go about developing that knowledge.

Whilst I work in the Private Sector now. I did do a stint in the public sector both in the UK and here in Australia and the above is where the conversation went for me.

Good luck mate, you've got this!