Can someone guide me to prep for SDE interviews?

I have a little over a month’s time to prepare DSA for interviews and practice questions for them as well. How can I do that in the most effective way possible?

P.S: I have some(little) experience of DSA and some internship experience as well ( not very DSA-centric)

Please help me devise a roadmap or a prep plan like some important topics that I should definitely cover and things that I can (or should ) skip and resources for the best approach.

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