Health check pattern in Microservices - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define a basic health check endpoint in a microservice.

Microservices

GET /health [1] 200 OK

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Adelivers

Breturns

Csends

Dresponds

Attempts:

3 left

💡 Hint

Common Mistakes

Using verbs that are not typically used in HTTP response context.

The health check endpoint responds with a 200 OK status to indicate the service is healthy.

2fill in blank

medium

Complete the code to implement a health check that verifies database connectivity.

Microservices

if database.[1]():
    return 'healthy'
else:
    return 'unhealthy'

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Aconnect

Bquery

Cping

Dcheck

Attempts:

3 left

💡 Hint

Common Mistakes

Using methods that perform actual queries instead of simple connectivity checks.

The ping() method is commonly used to check if the database connection is alive.

3fill in blank

hard

Fix the error in the health check code that incorrectly returns the status.

Microservices

def health_check():
    status = 'healthy' if service.is_up() else [1]
    return status

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A'unhealthy'

BFalse

C'healthy'

DTrue

Attempts:

3 left

💡 Hint

Common Mistakes

Returning boolean values instead of status strings.

The health check should return 'unhealthy' when the service is down, not True or False.

4fill in blank

hard

Fill both blanks to complete the health check that verifies both cache and database status.

Microservices

def health_check():
    cache_status = cache.[1]()
    db_status = database.[2]()
    if cache_status and db_status:
        return 'healthy'
    else:
        return 'unhealthy'

Drag options to blanks, or click blank then click option'

Aping

Bconnect

Cquery

Dcheck

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up methods that perform queries with connectivity checks.

The cache uses ping() to check connectivity, and the database uses connect() to verify connection.

5fill in blank

hard

Fill all three blanks to complete the health check dictionary comprehension filtering only healthy services.

Microservices

health_status = {service: status for service, status in services.items() if status [1] 'healthy' and service.[2]() and not service.[3]()}

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A==

Bping

Cis_down

D!=

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong comparison operators or method names.

The comprehension filters services where status is == 'healthy', the service ping() returns true, and the service is not is_down().