1. What is a Data Structure? A Data Structure is a way of organizing and storing data so that it can be used efficiently.Think of it like containers for data — depending on the problem, you choose the right container. Examples in real life: 👉 Different data structures help us…
Data Structures & Algorithms
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Mastering Recursion (with real-world analogies)
If there’s one topic in coding interviews that makes people scratch their heads, it’s recursion. It’s powerful, elegant, and sometimes… a little confusing. But here’s the good news: recursion isn’t some magical thing reserved for math wizards. It’s just a way of solving problems by breaking them into smaller versions…
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Arrays, Hashmaps & Strings: The building blocks of interviews
If you’ve been grinding DSA problems, you’ve probably noticed a pattern —90% of interview questions start with just three things: Arrays, Hashmaps, or Strings. Why? Because these are the building blocks. If you can bend these data structures to your will, you can probably solve anything an interviewer throws at…
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Why FAANG Still Cares About DSA in 2025
If you’re preparing for FAANG interviews in 2025 (like me right now 👀), you’ve probably asked yourself:“Why the heck are they still asking me about reversing a linked list when nobody in real life codes that from scratch?” Fair question. But the answer is deeper than just “because tradition.” Let’s…