Evaluate your mock interviews:
Requirements (-): Did you ask good questions? Clarify ambiguity?
Estimation (-): Were calculations reasonable? Did you show your work?
Design breadth (-): Did you cover all major components?
Design depth (-): Did you go deep on - areas?
Trade-offs (-): Did you discuss alternatives? Justify decisions?
Communication (-): Clear explanations? Good pacing? Checked for understanding?
Score +: Ready for interviews. -: Close, focus on weak areas. Below : More practice needed.