Technical Questions Java: Explain the difference between HashMap and Hashtable . How does Java handle memory management, and what is garbage collection? What are the features introduced in Java 17? Explain method overloading and method overriding with examples. What is the purpose of the final , finally , and finalize keywords in Java? Data Structures and Algorithms: How do you find the middle element of a linked list in a single pass? Explain different sorting algorithms and their time complexities. How would you implement a stack using queues? Discuss the difference between depth-first search (DFS) and breadth-first search (BFS). What are the advantages of using a binary search tree over a simple array? Database Management: What is normalization, and why is it important in databases? Explain the difference between JOIN , LEFT JOIN , and RIGHT JOIN . How would you optimize a slow-running query? What are indexes, and how do they improve query performance? Explain ACID propertie...
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