How do I identify fake selenium testers ?

Ans : 

First of all there are no fake selenium testers. There are beginner selenium testers and then there are experienced selenium testers. Being a beginner you don't work on real projects so they are unaware about the complex issues which an experienced person faced and therefore found a solution for this.

To know whether a person is experienced or not in selenium,I follow these steps in interviews.

1. Carefully looking at the job description in his/her previous companies to know what was his/her background.(50% of the cases I found it from CV itself).
2. Asking whether person has experience in writing/modification of frameworks based on selenium or not(an experienced person have this experience and beginner doesn't)-30% of the cases I found this from this question.
3. Since using selenium requires two things-solid oops concepts and solid xpath knowledge therefore few basic questions on these helps me found out 10% of the cases where the person actually understand basics.
4. Last 10% are the most difficult they are beginners but they really work hard by themselves and they know selenium classes,methods and oops concepts. I give them the intermediate level questions where I found the difficulty during working on framework creation and tests scripts writing myself. Also I ask questions about overriding the built in selenium interfaces methods and using customized classes. 7–8 % of the cases I found it from this question.
5. Last 2–3 clears all these questions, they are very smart even though they haven't worked on real projects but tried their hands on public websites. I find them useful in 2–5 years of experience range but can't take them in 5+ role where you have to work as mentor as well.

Remember every experienced person was once a beginner so next time you ask this question please rephrase the word “fake”.