At first site, SEO seems very easy thing to do. Actually it is not. To become master or expert in this field is not that easy as one can think. Even if you are not from IT background you can be an expert search engine optimizer but you must be aware about some strategy and skills.

I have collected some good as well as helpful questions which might be useful for an SEO interview. If you know the answers of such tricky question, you can stand differently among crowd. List of questions is as listed below:
  1. How you perform SEO on website?
  2. Do you know HTML coding?
  3. DO you have knowledge of Page Rank algorithms? Explain it.
  4. How you created any SEO tools either from scratch or pieced together from others?
  5. What does PageRank mean to you?
  6. What is the use of XML sitemap?
  7. What are your thoughts on the direction of Web 2.0 technologies with regards to SEO?
  8. Which SEO tools you use?
  9. What is the difference between robots.txt and meta robots tag?
  10. Under which conditions would you look to exclude pages from search engines using robots.txt vs meta robots tag?
  11. What is the most important thing to take care to get organic results in SERP?
  12. Do you have experience in copywriting and can you provide some writing samples?
  13. Have you ever had something you've written reach the front-page of Digg? Mixx? Or be Stumbled?
  14. What is the importance of META tags?
  15. Do you know Page sculpting? What is that?
  16. If ever you need to move all your contents to another domain, what steps will you follow?
  17. Tell me about top 10 “on page ” elements to optimize the site. Priority wise.
  18. Do you believe in buying a link? Do you think it’s a good practice?
  19. What is Latent Semantic Analysis (LSI Indexing)?
  20. What is Phrase Based Indexing and Retrieval and what roles does it play?
  21. What is the difference between SEO and SEM?
  22. What kind of strategies do you normally implement for back links?
  23. How social media is connected with SEO?
  24. What is the difference between PageRank and Toolbar PageRank?
  25. Why might you want to use nofollow on an internal link?
  26. Do you know about web analysis and its packages?
  27. From an analytics point of view, explain different between a user from organic search results vs. a type-in user?
  28. How do you distinguish the results of your search optimization work from a seasonal change in traffic patterns?
  29. How do you evaluate whether an SEO campaign is working?
  30. Explain about competitive analysis and which techniques do you use?
  31. If site doesn’t improves after 6 months of SEO work, how will you solve the problem?
  32. How many target keywords should a site have?
  33. How do *you* help a customer decide how to their budget between organic SEO and pay-per-click SEM?
  34. You hear a rumor that Google is weighting the HTML LAYER tag very heavily in ranking the relevance of its results – how does this affect your work?
  35. Why does Google rank Wikipedia for so many topics?
I hope these questioner helps you a lot...