Top Infosys Interview & DSA Questions for DSE & L1 Role | Must Watch Before Interview 2026💻

Real Infosys DSE & L1 interview questions shared by KIET students — DSA, OOPs, SQL, JavaScript, OS and more. Part 1 covers DSE + L1 rounds. Part 2 coming soon for L2 & L3. 📌 0:00 Hook — Infosys ne exactly yahi pooche the 0:42 Intro 2:13 DSE Round — OOPs (Inheritance, Abstraction) 5:46 DSE — SQL Normalization (1NF, 2NF, 3NF, BCNF) 6:34 DSE — DSA: Common elements, BST, Linked List 7:34 DSE — project & resume 8:33 L1 Round — PORT numbers, Deadlock, Race Condition 10:26 L1 — UNIQUE vs PRIMARY, Diamond Problem, ACID 11:48 L1 — JavaScript: Event Loop, Hoisting, TDZ 12:09 L1 — NoSQL vs SQL, Async/Await, Arrow vs Normal function 12:19 L1 — motivation 🔔 Subscribe for Part 2: L2 & L3 rounds #infosys #InfosysInterview #DSERole #PlacementPrep2026 #KIET #DSAPagalu #JavaScriptInterview #InfosysHiring2026