100 DFT (Design for Testability) Interview Questions

DFT Fundamentals

1. What is DFT?
2. Why is DFT required in VLSI design?
3. What are the objectives of DFT?
4. What is testability?
5. What are controllability and observability?
6. What is fault coverage?
7. What is test coverage?
8. What is manufacturability testing?
9. What is silicon testing?
10. Explain the DFT flow.

Fault Models

1. What is a fault model?
2. What is a Stuck-At Fault (SAF)?
3. Difference between Stuck-At-0 and Stuck-At-1 faults.
4. What is an open fault?
5. What is a bridging fault?
6. What is a transition fault?