DSA

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