Web Reference: Mar 21, 2024 · Solve tricky Java programs under time constraints to simulate real interview pressure. Participate in mock interviews or coding challenges on platforms like LeetCode, CodeChef, and HackerRank. Dec 20, 2024 · Explore 25 tough Java coding challenges across recursion, OOP design, algorithms, concurrency, and more. Improve your skills with task overviews and code solutions. May 16, 2023 · Write a Java program or function to find the longest substring without repeating characters in a given string. For example, if “javaconceptoftheday” is the input string, then the longest substring without repeating or duplicate characters is “oftheday”.
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