It has been more than seven days , but no reply from recruiter about the phone interview . My interview was 50-50 . Question was something like this , https://leetcode.com/discuss/interview-question/241130/Replace-all-occurances-of-a-char-Google-Phone-Interview/242013
But , not exactly this .

I could not find O(n) and in-place solution . I coded the O(n^2) solution which was in-place.

Is this delay a sign of rejection ? Should I knock the recruiter or wait more ?

update :
I got rejected and got to know that after mailing the recruiter . She told me to try next time :') and not to be depressed .