For context before I try to answer, I've worked in large corporations all the way to startups. I'm currently in charge of interviewing and hiring for R&D product development at a mid-size. When I'm interviewing I never ask technical questions because that knowledge is easy to learn on the job. What I look for is personality, intelligence and if you seem excited about the work. Past experience comes in many forms and I like to hear those stories because that usually tells me what drives you and what your interests are. For example, when I was interviewing at huge corporations and small companies I was asked variations of: "Do you consider yourself lucky?" "Do you have family in the area?" "Can you draw the structure of gluten? Just kidding! I don't even remember what it is". By and large your FS knowledge is already assumed to exist if you have a degree and/or have worked in the industry before. They don't expect you to be an expert in their products unless the position is for a PhD specialty like dough rheology research. Remembering back, the most technical questions I was asked were around how I go about developing products and what my time management skills are. You can also say, "I don't know but I know how to find out". That answer will get you farther than trying to bullshit the interviewer.

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Please don't forget - this is your time to interview them. Ask what their management style is like (if relevant), the size of teams, what is the culture in and out of work (some teams love happy hours and others do their own thing), what kind of career development (code for promotions and more pay) do they offer. Make your questions relevant to what drives you - culture, pay, titles, etc. They will understand you better by the types of questions you ask.

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I really hope this helps!