Given the method annotated as @Cacheable(value = "products", key = "#id") and called with getProduct(5), what will be the cache key used?

medium📝 component behavior Q4 of 15

Spring Boot - Caching

Given the method annotated as @Cacheable(value = "products", key = "#id") and called with getProduct(5), what will be the cache key used?

AgetProduct

B"#id"

Cproducts

Step-by-Step Solution

Solution:

Step 1: Understand key expression evaluation
The key '#id' evaluates to the method parameter value, which is 5 in this call.
Step 2: Differentiate from string literals
"#id" as a string literal would not be used; the actual value 5 is the key.
Final Answer:
5 -> Option D
Quick Check:
Cache key = parameter value [OK]

Quick Trick: Cache key evaluates SpEL to parameter value [OK]

Common Mistakes:

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