Developer shares 3-month FAANG interview prep method built on teaching back solutions

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A software developer writing on DEV Community describes a structured approach to preparing for FAANG coding interviews after struggling with rote memorization of LeetCode solutions. The core technique, called the 'teach-back method,' involves verbally explaining each solved problem step-by-step as if teaching a beginner, covering the problem statement, approach, edge cases, pseudocode, and a manual test. The author credits the method with shifting their preparation from copying solutions to genuinely understanding and rebuilding them under pressure. Inspiration came from watching a friend explain a dynamic programming problem by focusing on intuition and asking 'what if' variations rather than just presenting code. The article includes annotated Python code examples to illustrate how the method changes the depth of engagement with even a basic problem like Two Sum.

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