Scalability testing helps identify how a system performs as the ____________ load increases.

  • Concurrent
  • Horizontal
  • Incremental
  • Vertical
Scalability testing examines how a system handles increased workload. Horizontal scaling involves adding more resources, such as servers, to distribute the load across multiple machines. Therefore, as the term "horizontal" implies expansion across a wider base, it directly relates to the system's performance with increasing loads.
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