[Solved] Given this pseudo-code for event-driven cache invalidation:if (updateEvent) { cache.invalidate('item42'); } return cache.get('item42');What will be returned if updateEvent is true? | Rest API

Rest API - Caching Strategies

Given this pseudo-code for event-driven cache invalidation:

if (updateEvent) {
  cache.invalidate('item42');
}
return cache.get('item42');

What will be returned if updateEvent is true?

AThe stale cached data for 'item42'

BAn error due to invalidation failure

CA cache miss leading to fresh data retrieval

DThe old data without invalidation

Step-by-Step Solution

Solution:

Step 1: Analyze the code flow
If updateEvent is true, cache.invalidate('item42') is called, removing the cached entry.
Step 2: Understand cache.get after invalidation
Since the cache entry is invalidated, cache.get('item42') results in a cache miss, triggering fresh data retrieval.
Final Answer:
A cache miss leading to fresh data retrieval -> Option C
Quick Check:
Invalidation causes cache miss, so fresh data returned [OK]

Quick Trick: Invalidation causes cache miss, triggers fresh fetch [OK]

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