I have failed clearing coding interview with FB 2-3 times now for PE (system engineer) role. Lc is not helping me for the questions like the below listed.
How do I practice these type of questions and master them? I am not a full time SWE. Any recommendations?

Questions:

1. Print fastest to slowest dinosaurs from csv
2. Find balttleships in 2D
3. mindsweeper grid design
4. Zombies making friends requests based on some conditions or something like that

#production engineer