[Solved] Analyze this health check function:function healthCheck() { if (cache.isAvailable()) { return { status: 200, message:... } }What response will it produce if the cache service is unreachable? | Microservices

Microservices - Resilience Patterns

Analyze this health check function:

function healthCheck() {
  if (cache.isAvailable()) {
    return { status: 200, message: 'Cache OK' };
  } else {
    return { status: 500, message: 'Cache Failure' };
  }
}

What response will it produce if the cache service is unreachable?

A{ status: 500, message: 'Cache Failure' }

B{ status: 200, message: 'Cache OK' }

C{ status: 404, message: 'Not Found' }

D{ status: 503, message: 'Service Unavailable' }

Step-by-Step Solution

Solution:

Step 1: Review condition
The function checks if cache.isAvailable() returns true.
Step 2: Determine output if cache unreachable
If cache is unreachable, isAvailable() returns false, so the else branch executes.
Step 3: Identify returned object
The else branch returns { status: 500, message: 'Cache Failure' }.
Final Answer:
{ status: 500, message: 'Cache Failure' } -> Option A
Quick Check:
False condition triggers error response [OK]

Quick Trick: False condition returns error object [OK]

Common Mistakes:

MISTAKES

Confusing status codes 500 and 503
Assuming success response despite failure

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Analyze this health check function:

Step 1: Review condition

Step 2: Determine output if cache unreachable

Step 3: Identify returned object

Final Answer:

Quick Check:

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