You are wasting your time with them. They are looking for SUPERMAN/SUPERCODER, someone who can solve multiple medium-hard questions within 45 minutes.
They expect an absolutely perfect (textbook) explanation on Computer Science questions.
You will have a better chance with US Tech companies.
I have a theory that they deliberately do that to outsiders, just to say they are neutral in hiring, but actually, they have particular non-skill/experience criteria.
Just turn them down.
Computer Science Topics:
Coding Algorithm Questions:
The following metrics were computed from 1 interview experience for the Indeed Sotfware Engineer role in Tokyo, Japan.
Indeed's interview process for their Sotfware Engineer roles in Tokyo, Japan is extremely selective, failing the vast majority of engineers.
Candidates reported having very negative feelings for Indeed's Sotfware Engineer interview process in Tokyo, Japan.