I think the key take away here is "I don't know" but being able to rectify that by having the ability to know.
Ultimately being honest with your self and abilities, along with constant exposure from being open minded, sharing and connecting with others coming from a place experience is solid trade marks for being a senior developer. Plus being able to deliver!!
For further actions, you may consider blocking this person and/or reporting abuse
We're a place where coders share, stay up-to-date and grow their careers.
I think the key take away here is "I don't know" but being able to rectify that by having the ability to know.
Ultimately being honest with your self and abilities, along with constant exposure from being open minded, sharing and connecting with others coming from a place experience is solid trade marks for being a senior developer. Plus being able to deliver!!