Routing Interview Questions

  1. Define the term routing?
  2. What are the four steps in routing?
  3. What are all the checks to be performed before Routing?
  4. What are the goal of Routing stage?
  5. What is Global routing?
  6. What are the three types of Global routing?
  7. What is Track Assignment?
  8. What is Detailed Routing?
  9. What is Search and Repair?
  10. How does the congestion number helps you to estimate the routing issues?
  11. What is Routing blockage? Why do we need them?
  12. Discuss the different types of DRC violations?
  13. What is the difference between 9 track and 12 track in standard cell?
  14. Why do we use alternate layer horizontal-vertical-horizontal/vertical-horizontal-vertical(HVH/VHV) routing?
  15. Is routing overflow and congestion related? Explain?
  16. Why power stripes are routed in the top metal layers?
  17. What is Crosstalk?
  18. How buffer can be used for avoiding crosstalk issue?
  19. How spacing will be used for avoiding crosstalk issue?
  20. How can you avoid crosstalk?
  21. What is Antenna Violation? How will you fix Antenna violation?
  22. What is Electromigration? How will you fix it?

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