Which statement best summarises the purpose of monitoring latency, traffic, errors and saturation together?
Select an answer to reveal the explanation.
Short Explanation
You monitor latency, traffic, errors, and saturation together because each covers a different failure mode. Together they show how the service behaves, how loaded it is, and whether it's heading for trouble. Drop one and you lose a whole failure mode, most often saturation, which is the one that would have warned you.
Full Explanation
The correct statement says each signal covers a different failure mode, so together they show how the service is behaving, how loaded it is, and whether it is heading for trouble. The signals are complementary. A service can be fast but failing, healthy but saturating, or slow only under a load level that traffic reveals. Watching all four detects each of those, and reading them together turns raw measurements into an assessment. The claim that they are four alternative ways of measuring the same underlying quantity, so any one is sufficient, is wrong because they measure genuinely different properties; substituting one for another leaves whole failure modes invisible. The claim that they are administrative metadata used to organise services within the monitoring tool is wrong because they are runtime measurements, not organisational metadata. The claim that they apply only to web front ends, not to backend services or databases, is wrong because the framework applies to any service that receives requests and consumes resources, including backends and databases. For the exam, be able to justify why all four are needed rather than only naming them.