Largest & Smallest Digit Problem | TCS NQT + Prime +CodeVita | Complete Placement Coding Preparation

🔥 Master the Largest and Smallest Digit Problem | TCS NQT + Prime + CodeVita | Placement Coding Learn how to solve the Largest and Smallest Digit Problem with step-by-step logic, dry runs, and optimized code for placement and competitive exams. This is one of the most frequently asked number theory questions in TCS NQT, Prime, CodeVita, and top MNC coding rounds. 📌 Problem Appears In ✔ TCS NQT Foundation Round ✔ TCS NQT Prime – Advanced Coding Round ✔ TCS CodeVita Contest ✔ TCS Prime Technical Interview ✔ Wipro NLTH Coding Round ✔ Infosys System Engineer Interview ✔ Accenture Coding Assessment ✔ Cognizant GenC Coding Round ✔ Capgemini Technical Round ✔ HCL Coding Test ✔ Tech Mahindra Coding Round 🧠 Problem Statement Given a number, find the largest digit and smallest digit. Example: Input: 5739 Output: Largest = 9 Smallest = 3 🎯 What You Will Learn ✔ Step-by-step logic to extract digits ✔ Loop-based number processing ✔ Handling edge cases (single-digit, zero, negative numbers) ✔ Optimized solution using minimum iterations ✔ Interview-focused explanation ✔ Time complexity analysis O(log n) ✔ Clear dry-run walkthroughs ✔ Placement & coding-round strategies 💻 Code Implementation In ✔ C Programming ✔ C++ ✔ Java ✔ Python 👨‍🎓 Who Should Watch • TCS NQT 2025 / 2026 aspirants • TCS Prime & CodeVita candidates • Final-year B.Tech / BE / MCA / Diploma students • Freshers preparing for MNC interviews • Beginners learning number theory & coding logic • Off-campus & on-campus placement aspirants 📚 Topics Covered • Largest digit logic • Smallest digit logic • Modulus (%) operator usage • Division & loop-based digit extraction • Edge case handling • Time & space complexity • Interview-oriented coding techniques • Competitive coding fundamentals 🔁 Step-by-Step Approach 1️⃣ Take input number 2️⃣ Initialize largest and smallest 3️⃣ Extract digits using % and / 4️⃣ Update largest and smallest values 5️⃣ Repeat until number becomes zero 6️⃣ Print final result ⏱ Time Complexity: O(log n) – efficient for all inputs ❓ Most Frequently Asked Questions (Important for Interviews) 🔹 Q1. Is this question asked in TCS NQT? ✔ Yes, very frequently in Foundation, Prime, and Interview rounds. 🔹 Q2. What logic should I explain in interviews? ✔ Explain digit extraction using modulus and division with a dry run. 🔹 Q3. Can this be solved without converting to string? ✔ Yes ✅ and loop-based numeric logic is preferred in interviews. 🔹 Q4. What is the time complexity? ✔ O(log n) because digits are processed one by one. 🔹 Q5. What edge cases should I handle? ✔ Single-digit numbers ✔ Input = 0 ✔ Negative numbers (if mentioned) 🔹 Q6. Which language is best for this problem? ✔ Any language works, but logic matters more than syntax. 🔹 Q7. Is this useful for CodeVita? ✔ Absolutely 💯 – basic number problems are CodeVita fundamentals. 🚀 Preparation Tips • Practice similar number-theory problems • Always dry-run before submitting • Avoid converting numbers to strings unless required • Focus on clean logic explanation • Optimize for clarity, not complexity 🧩 Skills You Will Develop • Number processing logic • Modulus & integer division mastery • Max/Min finding techniques • Loop optimization • Edge-case handling • Interview-ready explanation skills 📢 Watch till the end to fully understand the logic, dry runs, and optimized code. This problem is mandatory for cracking TCS NQT, Prime, CodeVita, and MNC coding rounds. ✅ Subscribe to InfoTechiezz for daily coding questions, placement prep, and MNC interview guidance. tcs nqt 2026, tcs prime coding questions, tcs codevita questions, largest digit problem, smallest digit problem, number theory coding questions, placement coding problems, wipro nlth coding questions, infosys coding interview questions, accenture coding round, cognizant genc coding questions, capgemini coding questions, hcl coding test questions, tech mahindra coding questions, dsa for placements, basic coding interview questions #TCSNQT #TCSNQT2026 #TCSPrime #TCSCodeVita #CodeVitaPreparation #LargestDigitProblem #SmallestDigitProblem #NumberTheory #CodingInterview #PlacementPreparation #MNCPreparation #CodingQuestions #InterviewCoding #DSAForPlacements #CampusPlacement #OffCampusDrive #FreshersJobs #TechnicalInterview #CodingRound #ProgrammingLogic #CProgramming #CppProgramming #JavaProgramming #PythonProgramming #WiproNLTH #InfosysPlacement #AccentureCoding #CognizantGenC #CapgeminiCoding #HCLCodingTest #TechMahindra #InterviewPreparation #CompetitiveCoding #CodingForBeginners #AptitudeCoding #NumberProblems #LogicBuilding