Binary Search Time Complexity

If you are preparing for coding interviews, mastering array problems is essential. In this short video, I covered 3 important patterns: - Reverse an array - Rotate array by k positions - Merge two sorted arrays These problems form the foundation for many advanced algorithmic questions. Understanding these patterns helps improve both problem-solving skills and coding efficiency. Explore structured DSA in Java roadmap + practice: www.quipoin.com #DSA #Java #Programming #Coding #SoftwareEngineering #InterviewPreparation #Algorithms

Most people overcomplicate this problem. At first glance, it feels like we need extra space or another array… But the trick is simple: Since the array is sorted, duplicates are always next to each other. Once you notice that, you can solve it in-place using a Two Pointer approach — no extra space needed. Small observation → big optimization. If you’re preparing for coding interviews, this pattern shows up more often than you think. Have you used this approach before? #DSA #TwoPointers #Java #CodingInterview #ProblemSolving #LeetCode #SoftwareEngineering

Here is one the most asked technical interview questions, LeetCode: Longest Substring Without Repeating Characters (medium) Given a string, find the length of the longest substring without repeating characters. 💡 Key idea: Use a sliding window and adjust it whenever a duplicate appears. 🧠 Solution: - Use two pointers to form a window and a hashmap to track character positions. - Move the right pointer through the string. - If a character repeats inside the window, move the left pointer past its last position. - Update the max length at each step. Time Complexity and Space Complexity: O(n) #LeetCode #Algorithms #CodingInterview #SoftwareEngineering #DSA #Java

🚀 Day 4 – Daily DSA Challenge A quick check on your fundamentals can make a big difference in interviews. Here’s a simple output-based question to test your understanding of arrays and indexing. 💡 What will be the output? Share your answer in the comments and let’s discuss 👇 #DSA #Coding #Java #DataStructures #Algorithms #InterviewPreparation #SoftwareEngineering #Learning #TechCareers

20 essential DSA coding patterns that every developer should know to strengthen problem-solving skills and crack coding interviews. These patterns helped me simplify complex problems and build a structured approach to DSA — and I hope they help you too! 💡 Consistency + Patterns = Confidence in coding If you’re preparing for interviews or want to level up your DSA game, stay tuned! Let’s grow together 🌱 #DataStructures #Algorithms #DSA #CodingPatterns #SoftwareEngineering #Java #InterviewPreparation #TechCareers #ProblemSolving #Developers #CodingJourney #LearnToCode #CareerGrowth #TechCommunity #Programming #100DaysOfCode

Day15 #100 days of leetcode One of the most asked string problems in interviews — and a great way to sharpen your problem-solving skills. 🔍 Problem Given a string, find the longest substring that reads the same forward and backward. 💡 Approach Used: Expand Around Center Instead of checking every substring (which is expensive), we treat each character as a center and expand outward. #DataStructures #Algorithms #Java #CodingInterview #LeetCode #ProblemSolving #TechCareers

Most people solve “Valid Palindrome” like this. Clean the string → reverse → compare. It works… but that’s not what interviewers are looking for. The real test is: 👉 Can you handle messy input? 👉 Can you avoid extra space? 👉 Can you think in constraints? That’s where Two Pointers comes in. Small problem. Big difference in thinking. #DSA #Java #CodingInterview #TwoPointers #ProblemSolving #SoftwareEngineering #TechLearning

Mastering this hierarchy is the difference between writing code that "just works" and writing code that scales. 🚀 Save this cheat sheet for your next technical interview! 💾 #DataStructures #DSA #PlacementPrep #IndiaTech #SoftwareEngineering #UniqueSystemSkills #CodingFundamentals #TechInterviews #Java #Python

Practicing Real Interview Thinking Solved a palindrome problem today — without using reverse. At first, I thought checking first and last character is enough. But I realized the correct approach is to compare characters from both ends step by step. This changed my thinking: Interview problems are not about complexity, but about correct logic. Small problems → Big learning. #Java #ProblemSolving #InterviewPrep #LearningInPublic

Mastering OOPs is a game-changer for coding interviews 💻🚀 Covered key concepts like: ✔ Encapsulation, Inheritance, Polymorphism ✔ Abstraction & Class Design ✔ Method Overloading & Overriding ✔ Real-world OOPs scenarios ✔ Important interview-based questions If your OOPs is strong, half of your interview is already cracked 💯 Don’t just learn concepts… understand how to apply them 🎯 Which topic should I cover next: DSA, Java, or Python? 👇 #OOPS #Programming #CodingInterview #Java #Python #Developer #TechSkills #CareerGrowth #InterviewPreparation Follow Rishabh Singh for daily coding & interview prep 🚀