Most Important DBMS Interview Questions In JUST 30 Mins | Internship and Placement Prep for 2025

Hey everyone! In this video, we cover the most important Database and DBMS concepts you need to prepare for internships and placements, from SQL basics to indexing, normalization, partitioning, sharding, and real-world system questions. This is your 30-minute crash course for cracking database rounds in product-based companies. We’ll walk through key interview topics, explain what actually happens on the backend when you interact with a website, and discuss the difference between RDBMS and file systems. Whether you're in your second year or final year, this video will help you understand what recruiters expect and how to explain concepts clearly in interviews. All the materials, resources, and premium bootcamp links are given below. Make sure to like, share, and subscribe to our channel for more! ---------------------------------------------------------------------------------------------------------------------------------------------------------- 📚 RESOURCES Materials for Core CS:   / internship-and-placement-resources   Full Core CS Course: https://maang.in/courses/Core-CS-for-... Premium 8th June Batch: https://maang.in/premium ---------------------------------------------------------------------------------------------------------------------------------------------------------- 💡 BEGINNER-FRIENDLY STARTER RESOURCES ✅ Free Language course with certificate: https://bit.ly/3I52EAb ✅ More free courses: https://bit.ly/3SKoCNO 🔴 Commando-style DSA + Dev + System Design training: https://bit.ly/3SKoM7S 🌐 All links and socials: https://linktr.ee/vivek_gupta ---------------------------------------------------------------------------------------------------------------------------------------------------------- ⏱️ CHAPTERS 00:00 Intro 01:15 Two Realms of Database Questions 02:52 Basic Terminologies 03:37 What Happens On The Web 04:17 Different Kinds of Databases 05:14 Why Database is Better Than Files 08:06 What is RDBMS? 09:21 Pages in DB 11:10 Building Indexes 13:22 What Does the Index Look Like 15:28 What is Database Partitioning 17:03 What is DB Sharding 17:50 Shared Lock vs Exclusive Lock 20:21 Types of Keys in Databases 22:55 Anomalies in Databases 24:30 What is Normalization 26:55 Why is Normalization Needed? 27:41 What is SQL 28:38 Other Important Topics 29:17 Outro ---------------------------------------------------------------------------------------------------------------------------------------------------------- 😃 ABOUT ME I’m Vivek, an engineer, Ex-Googler, ICPC World Finalist turned educator, and founder of AlgoZenith. I’ve taught Data Structures, Algorithms, and Competitive Programming to over 3000+ students and worked with 10+ engineering colleges to bridge the gap between college learning and real-world tech careers. Through AlgoZenith, I help students crack top product-based companies and become industry-ready. On this channel, you’ll find videos on coding strategies, roadmaps, interview prep, problem-solving techniques, and everything you need to level up your software career. ---------------------------------------------------------------------------------------------------------------------------------------------------------- 📲 SOCIALS Instagram:   / vivekgupta.ai   Twitter: https://x.com/vg19988 LinkedIn:   / acraider   Codechef (5 ⭐️): https://www.codechef.com/users/acraider Codeforces (Master, max. 2269): https://codeforces.com/profile/acraider ---------------------------------------------------------------------------------------------------------------------------------------------------------- 🏷️ TAGS dbms interview questions, database concepts for interviews, dbms placement prep, important database topics, sql vs rdbms, normalization in dbms, database sharding explained, sql indexing, core cs for placement, system design basics, relational databases, product company interview prep, shared vs exclusive lock, types of keys in dbms, dbms anomalies, computer science placement topics, backend system questions, algozenith ---------------------------------------------------------------------------------------------------------------------------------------------------------- #️⃣ HASHTAGS #dbms #placements #interviewprep