What is the difference between load testing and stress testing?

What is the difference between load testing and stress testing?

• A. Load tests assess expected peak load; stress tests push beyond capacity
• B. Load tests build new features; stress tests patch bugs
• C. Load tests test security; stress tests test performance
• D. Load tests are for unit; stress tests are for integration

Answer: (A)

The key idea is that load testing and stress testing measure performance under different usage levels. Load testing checks how the system behaves under the expected or peak load you anticipate in production, staying within planned capacity and ensuring response times, throughput, and resource use are acceptable. Stress testing goes beyond those limits to see what happens when demand exceeds capacity: where the system fails, how it degrades, which components fail first, and whether it recovers gracefully after the load drops. In practice, you’d simulate the expected number of concurrent users to verify performance, and you’d push beyond that to discover the breaking point. The other options don’t describe this distinction: one talks about building features or patching bugs, another about security versus performance, and another about unit versus integration tests.

The key idea is that load testing and stress testing measure performance under different usage levels. Load testing checks how the system behaves under the expected or peak load you anticipate in production, staying within planned capacity and ensuring response times, throughput, and resource use are acceptable. Stress testing goes beyond those limits to see what happens when demand exceeds capacity: where the system fails, how it degrades, which components fail first, and whether it recovers gracefully after the load drops. In practice, you’d simulate the expected number of concurrent users to verify performance, and you’d push beyond that to discover the breaking point. The other options don’t describe this distinction: one talks about building features or patching bugs, another about security versus performance, and another about unit versus integration tests.