If you feel rusty, your first task is to figure out what kind of technical interview you are actually facing.
Match the prep to the format
A live coding screen, systems discussion, portfolio review, financial case, or hands-on product interview each reward different practice. Do not train for the wrong sport.
Rebuild with short targeted reps
Short daily sessions usually help more than one giant cram. Review concepts, practice speaking through your reasoning, and revisit the tools or frameworks most likely to surface.
Bottom line
Rust fades faster when your prep is specific. Narrow the format, then practice the kind of thinking the interview will actually demand.