Based on what you've described (not familiar with data structure/CS algorithm) the answer is very simple - you can't prepare in a week. Don't do it. Tell the r

Based on what you've described (not familiar with data structure/CS algorithm) the answer is very simple - you can't prepare in a week. Don't do it. Tell the recruiter you need a month to prepare or they will have to skip the CS basic screen for you in order to fast forward the process. If you're one of these niche developers (python/C++), you might have a little power when it comes to asking you the right questions. Same goes when a company originally contacted you, you're in a position of power.