Less commonly than the standard questions (OTP, autocomplete, pagination), but they may appear in harder interviews or at companies that test specific skills (recursion, game logic, algorithms). Practice them after mastering the common ones.
Star rating, todo list with filters, nested comments (Reddit-style), tic-tac-toe, stopwatch, calculator, password strength meter, drag and drop list, tooltip component, and BFS visualizer. Practice these after mastering the common questions.
Recursion (nested comments), game logic (tic-tac-toe), algorithms (BFS visualizer), drag-and-drop API, localStorage persistence, and time-based operations (stopwatch). They test skills beyond the common questions.
Use a tree data structure. Write a recursive render function. Each comment has reply, vote, and collapse handlers. Indent nested comments. Handle reply (add a child), vote (update score), and collapse (toggle children visibility).
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