# Introduction to Folding Questions Some questions you should be able to answer _after_ the *Introduction to Folding* talk by Oskar given at PSE Summer Program 2023. Basic questions to check your understand. ## Questions 1. What problem does folding solve? 2. What is a folding scheme? 3. Why is folding useful for ZK-VM and ZK-ML? 4. Which part of the steps in IVC does the verifier have to look at in Nova? 5. Why do we need relaxed R1CS? 6. Why do we need a final SNARK at the end? 7. What is recursion overhead and why care? 8. Why do we sometimes combine two proof systems? 9. What does Nova Scotia do? 10. What are some things that other folding schemes improve on over Nova?