#Java

Given a linked list `1 → 2 → 3 → 4 → 5`, reverse the nodes in pairs to obtain `2 → 1 → 4 → 3 → 5`.

Discuss your previous projects, emphasizing your role, challenges faced, and technologies used.

Identify potential concurrency issues in a given scenario and propose a suitable locking strategy to secure shared resources.

Analyze a given code snippet to compare outcomes of single-threaded vs. multi-threaded execution, discussing the differences.

Implement a solution that uses Binary Search to efficiently find a target element in a sorted array. Ensure optimal runtime complexity.