DSA

🔥 Master Stack Algorithms in Java: The Ultimate Guide with 5 LeetCode Challenges [2025]

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What it stack

Why You’ll Love This Guide Unlock the power of stacks—a foundational data structure that supercharges your problem-solving skills! Whether you’re a coding newbie or prepping for interviews, this guide breaks down stacks effortlessly with Java examples and 5 handpicked LeetCode challenges to test your skills. Let’s dive in! What is a Stack? 🥞 A stack is a linear data structure that follows the LIFO (Last … Read more

How to Solve the Knuth-Morris-Pratt (KMP) Algorithm Problem in 5 Simple Steps

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kmp

The Knuth-Morris-Pratt (KMP) algorithm is a powerful pattern-matching technique often asked in interviews at top companies like Microsoft, Google, and Amazon. This problem is common in coding interviews because it evaluates your understanding of string manipulation and algorithmic optimization. In this article, we’ll explain the KMP algorithm, break it down into manageable steps, and provide … Read more

First Non-Repeating Character in a String: A Complete Guide with Java Solution

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First Non-Repeating Character

Introduction Finding the first non-repeating character in a string is a popular coding challenge, often appearing in technical interviews at top companies such as Amazon, Microsoft, and Goldman Sachs. This problem evaluates your understanding of data structures, particularly hashing, and your ability to optimize algorithms. Why is This Problem Important? This problem is frequently asked … Read more

5 Proven Steps to Find the Second Largest Element in an Array

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Second Largest Element

Finding the second largest element in an array is a common challenge in programming, especially in coding interviews and technical exams. In this guide, we’ll learn how to efficiently solve this problem with Python and explore examples to solidify your understanding. What is the Second Largest Element? The second largest element in an array is … Read more