[Solved] Consider this simplified code snippet in a microservice receiving... log(f"End processing request {correlation_id}") What will be logged if the incoming request has header X-Correlation-ID: abc123? | Microservices

Microservices - Monitoring and Observability

Consider this simplified code snippet in a microservice receiving an HTTP request:

def handle_request(request):
    correlation_id = request.headers.get('X-Correlation-ID')
    log(f"Start processing request {correlation_id}")
    # ... process ...
    log(f"End processing request {correlation_id}")

What will be logged if the incoming request has header X-Correlation-ID: abc123?

ANo logs will be generated

BStart processing request abc123 End processing request abc123

CStart processing request X-Correlation-ID End processing request X-Correlation-ID

DStart processing request None End processing request None

Step-by-Step Solution

Solution:

Step 1: Extract Correlation ID from headers
The code uses request.headers.get('X-Correlation-ID') which returns the header value if present.
Step 2: Check the header value in the request
The request has X-Correlation-ID: abc123, so correlation_id will be 'abc123'.
Final Answer:
Start processing request abc123 End processing request abc123 -> Option B
Quick Check:
Header value read correctly = logs with abc123 [OK]

Quick Trick: Headers.get returns value or None; here value exists [OK]

Common Mistakes:

MISTAKES

Assuming header key is logged instead of value
Thinking None is logged when header exists
Believing no logs are generated

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More Microservices Quizzes

Consider this simplified code snippet in a microservice receiving an HTTP request:

Step 1: Extract Correlation ID from headers

Step 2: Check the header value in the request

Final Answer:

Quick Check:

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