DVA-C02 Question 126

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  D) Correct In a write-through cache, every write operation to the database is immediately mirrored in the cache. This ensures that the cache always contains the most up-to-date data and is ideal for scenarios where real-time consistency is required, such as updating dashboards.

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  C) Eliminated In a lazy-loading cache, the data is loaded into the cache only when requested. If the data is not in the cache (a "cache miss"), it is fetched from the database, loaded into the cache, and returned to the application. While this reduces unnecessary caching, it does not proactively update the cache. Therefore, data in the cache may become stale, which is unsuitable for real-time dashboards.

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  D) Correct In a write-through cache, every write operation to the database is immediately mirrored in the cache. This ensures that the cache always contains the most up-to-date data and is ideal for scenarios where real-time consistency is required, such as updating dashboards.