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Data structure and algorithms are the most important skills to be prepared for an interview at a top product-based company. The steps outlined below will help you develop and improve your DSA skills quickly and effectively. Learn about various algorithms like the pigeonhole principle, square root decomposition, set theory, [bitwise operations, graph theory, dynamic programming, greedy algorithms, etc. Mastering algorithms makes you a competitive programmer because at this level you learn to optimize the code to have minimal execution time.