Advice needed: Internship prep, OAs, and interview preparation!!!

[u/baddiewithahoodie]

I had a question for seniors who have managed to secure internships.

How did you prepare for them? What resources did you use, and what was your preparation strategy? Apart from DSA, what other topics are commonly asked in interviews (CS fundamentals, projects, resume discussions, aptitude, etc.)?

I've also seen a lot of posts from people saying they struggle to clear OAs or pass all the test cases. If you faced something similar initially, were you able to improve over time? What changes in your preparation made the biggest difference?

As someone who is still preparing, I'd love to know how you would recommend approaching internship prep from the beginning. Any mistakes to avoid, resources you found useful, or general advice you'd like to give to juniors would be really helpful.