Health check endpoints in HLD - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define a basic health check endpoint that returns a 200 status.

HLD

GET /health [1] 200 OK

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

Aresponds with

Breturns

Csends

Doutputs

Attempts:

3 left

💡 Hint

Common Mistakes

Using verbs that don't fit HTTP response context like 'responds with' instead of 'returns'.

Not returning any status code.

The health check endpoint should return a 200 OK status to indicate the service is healthy.

2fill in blank

medium

Complete the code to add a readiness check endpoint that verifies database connectivity.

HLD

if database.[1]():
    return 200
else:
    return 503

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Aping

Bis_connected

Cconnect

Dcheck

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'connect' which attempts a new connection instead of checking existing connectivity.

Using generic names like 'check' without clear meaning.

The readiness check often uses a ping method to verify if the database is reachable.

3fill in blank

hard

Fix the error in the health check response code to correctly indicate service health.

HLD

def health_check():
    return 'Service is healthy', [1]

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

A200

B500

C404

D301

Attempts:

3 left

💡 Hint

Common Mistakes

Returning error codes like 404 or 500 which indicate problems.

Using redirect codes like 301 which are not appropriate here.

The health check should return HTTP status code 200 to indicate the service is healthy.

4fill in blank

hard

Fill both blanks to create a health check that returns JSON with status.

HLD

def health_check():
    return [1], [2]

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A{"status": "ok"}

B200

C{'timestamp': time.time()}

D404

Attempts:

3 left

💡 Hint

Common Mistakes

Returning 404 status code which means not found.

Returning only timestamp without status.

The health check should return a JSON body with status and a 200 status code.

5fill in blank

hard

Fill all three blanks to implement a readiness check that returns 200 if cache and DB are healthy, else 503.

HLD

def readiness_check():
    if cache.[1]() and db.[2]():
        return [3]
    else:
        return 503

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

Aping

Bis_alive

C200

Dconnect

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'connect' which may attempt new connections instead of health checks.

Returning 503 when services are healthy.

The readiness check calls ping on cache and is_alive on db, returning 200 if both are healthy.