Amazon Interview Question

DSA: Valid Parentheses Sort 0s, 1s, and 2s (Dutch National Flag problem) Maximum Sum Subarray (Kadane’s Algorithm) Reverse Words in a String SQL / DBMS: Write queries using GROUP BY and aggregate functions Solve a complex JOIN query mixing multiple tables Conceptual questions on schema design, OLTP vs OLAP, data warehousing, and data modeling Scenario-based question: Design a real-life database schema and explain how you’d model and query it Linux: Basics like navigating directories, file handling Missed out on tougher ones like grep and sed