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Which HTTP status code indicates that a REST API service is currently unavailable, affecting uptime?

easy📝 Syntax Q3 of 15
Rest API - API Testing and Monitoring
Which HTTP status code indicates that a REST API service is currently unavailable, affecting uptime?
A200 OK
B301 Moved Permanently
C404 Not Found
D503 Service Unavailable
Step-by-Step Solution
Solution:
  1. Step 1: Understand HTTP status codes

    503 means the server is temporarily unable to handle the request, indicating downtime.
  2. Step 2: Eliminate other codes

    200 means success, 404 means resource missing, 301 means redirect; none indicate downtime.
  3. Final Answer:

    503 Service Unavailable -> Option D
  4. Quick Check:

    Downtime status code = 503 [OK]
Quick Trick: 503 means service is down temporarily [OK]
Common Mistakes:
MISTAKES
  • Choosing 404 as downtime code
  • Confusing 200 with downtime
  • Selecting 301 which is a redirect

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