Which of the following synchronization techniques is used to resolve the Readers-Writers Problem efficiently?

Semaphores are synchronization primitives used to manage access to shared resources in multi-threaded environments. In the Readers-Writers Problem, semaphores efficiently balance multiple readers accessing shared data simultaneously, while ensuring mutual exclusion for writers to avoid data inconsistency. The problem is solved using two semaphores: one for mutual exclusion (ensuring only one writer or a group of readers access the data) and another for resource access control. This ensures fairness and prevents issues like starvation of writers. Semaphores are widely used due to their flexibility and efficiency in solving synchronization problems. Why Other Options Are Incorrect: 1. Mutex Locks: Enforce strict mutual exclusion but cannot differentiate between readers and writers, leading to inefficiency. 2. Spinlocks: Suitable for short wait times but consume CPU cycles unnecessarily, making them inefficient. 3. Monitors: Provide higher-level synchronization but require language-level support, limiting their applicability. 4. Condition Variables: Complement mutexes but are not standalone synchronization mechanisms. Semaphores provide an optimal balance of efficiency and simplicity for resolving the Readers-Writers Problem.