1 / 5
An engineer says: 'We cache node_modules keyed on the lockfile hash.' What is the 'cache key' for?
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The cache key identifies a cache entry; when the lockfile hash changes the key changes and the cache is rebuilt.
2 / 5
What is a 'cache hit' in a CI pipeline?
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A cache hit means a valid cached entry existed and was reused, speeding up the build.
3 / 5
The team 'parallelises' the test suite across jobs. What does that achieve?
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Parallelising spreads work across runners so total elapsed time drops.
4 / 5
Which sentence correctly uses 'Docker layer caching'?
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Ordering stable steps early lets Docker reuse cached layers, rebuilding only what changed.
5 / 5
A build is described as 'incremental'. What does that mean?
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An incremental build reuses prior outputs and only rebuilds changed components.