Question:
Which of the following synchronization mechanisms allows multiple processes to safely access a shared resource?
Which of the following synchronization mechanisms allows multiple processes to safely access a shared resource?
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Look for the classic wait and signal counter used to guard a critical section, not a memory technique.
Updated On: Jul 2, 2026
- Buffering
- Paging
- Virtual memory
- Semaphore
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The Correct Option is D
Solution and Explanation
Step 1: The question asks for a synchronization mechanism, a tool that coordinates access so processes do not corrupt shared data.
Step 2: A semaphore is an integer variable with atomic wait and signal operations. It controls how many processes may enter a critical section at once, enforcing safe, ordered access to a shared resource.
Step 3: Buffering is a data-holding technique, paging is a memory-mapping scheme, and virtual memory extends addressable space. None of these coordinate concurrent access.
Step 4: Only the semaphore provides synchronization. The correct option is (D).
Step 2: A semaphore is an integer variable with atomic wait and signal operations. It controls how many processes may enter a critical section at once, enforcing safe, ordered access to a shared resource.
Step 3: Buffering is a data-holding technique, paging is a memory-mapping scheme, and virtual memory extends addressable space. None of these coordinate concurrent access.
Step 4: Only the semaphore provides synchronization. The correct option is (D).
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