Avoiding Deadlocks in Multithreading

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

🚀 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

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

Backend Interview Prep in 2026 👇 Most people: ❌ Watch random videos ❌ Read scattered blogs ❌ Forget everything in 2 days Smart people: ✅ Follow structured learning ✅ Practice real scenarios ✅ Focus on system design That’s exactly why I created this 👇 📘 Backend Interview Master PDF 👉 Link: https://lnkd.in/gbF6u9ni 🎁 Use JAVA25 for 15% OFF. Don’t prepare hard. Prepare smart. #Java #Backend #SystemDesign

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

🚀 Java Backend Interview Series – Day 4 Collections are asked in almost every interview 👇 📦 Collections Framework: 1️⃣ Internal working of ArrayList 2️⃣ Internal working of HashMap 3️⃣ HashMap vs Hashtable 4️⃣ ArrayList vs LinkedList 5️⃣ Vector vs ArrayList 6️⃣ What is immutable class? 7️⃣ Comparator vs Comparable 8️⃣ What causes ConcurrentModificationException? 9️⃣ What is CopyOnWriteArrayList? 🔟 When to use ConcurrentHashMap? 💡 If you don’t know internals → you’ll struggle in interviews 📌 Save this 👇 Comment “NEXT” for Day 5 #java #javainterviews #interviewpreparation #backend

𝟰𝟬 𝗦𝗽𝗿𝗶𝗻𝗴 𝗕𝗼𝗼𝘁 𝗔𝗻𝗻𝗼𝘁𝗮𝘁𝗶𝗼𝗻𝘀. 𝗢𝗻𝗲 𝗰𝗮𝗿𝗼𝘂𝘀𝗲𝗹 🎉 Most devs 𝗺𝗲𝗺𝗼𝗿𝗶𝘇𝗲 annotations. Top devs know 𝗪𝗛𝗬 they exist. I built this carousel so you never blank out in an interview again. 𝟰𝟬 𝗮𝗻𝗻𝗼𝘁𝗮𝘁𝗶𝗼𝗻𝘀 — each explained in 𝗽𝗹𝗮𝗶𝗻 𝗘𝗻𝗴𝗹𝗶𝘀𝗵: • 𝗕𝗲𝗮𝗻 𝗪𝗶𝗿𝗶𝗻𝗴 (@Autowired, @Qualifier, @Lazy...) • 𝗦𝘁𝗲𝗿𝗲𝗼𝘁𝘆𝗽𝗲𝘀 (@Service, @Repository, @Component...) • 𝗪𝗲𝗯 & 𝗥𝗘𝗦𝗧 (@GetMapping, @RestController...) • 𝗖𝗼𝗻𝗳𝗶𝗴, 𝗔𝘀𝘆𝗻𝗰, 𝗖𝗮𝗰𝗵𝗶𝗻𝗴, 𝗝𝗦𝗢𝗡 & more 𝗦𝘄𝗶𝗽𝗲 → 𝗦𝗮𝘃𝗲 → 𝗦𝗵𝗮𝗿𝗲 with someone preparing for interviews. 💬 Which annotation confuses you the most? Drop it below 👇 #SpringBoot #Java #BackendDevelopment #InterviewPrep #JavaDeveloper #PakistaniDevelopers

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 31 of #128DaysOfCode 🔹 Problem Insight: Given a string with extra spaces, the goal was to reverse the order of words while ensuring: - No leading or trailing spaces - Only a single space between words 🔹 What I Learned: - How to handle multiple spaces efficiently - Importance of string traversal from end to start - Using StringBuilder for optimized string operations - Avoiding built-in shortcuts like "split()" to strengthen logic 🔹 Approach: Instead of relying on inbuilt functions, I manually parsed the string: - Skipped unnecessary spaces - Extracted words one by one - Rebuilt the string in reverse order 🔹 Key Takeaway: Sometimes, avoiding easy methods helps build deeper problem-solving skills — exactly what interviews test! 💡 Consistency is the real game. One step closer to becoming a better developer every single day 💻🔥 #Java #DSA #CodingJourney #Consistency #PlacementPreparation #LearningInPublic