Bird
0
0

A Raspberry Pi web server script fails to start and shows 'Address already in use' error. What is the likely cause?

medium📝 Debug Q6 of 15
Raspberry Pi - Web Server and API
A Raspberry Pi web server script fails to start and shows 'Address already in use' error. What is the likely cause?
AThe internet connection is lost.
BThe Raspberry Pi is out of memory.
CThe server code has a syntax error.
DAnother process is using the same port the server tries to bind.
Step-by-Step Solution
Solution:

  1. Step 1: Understand 'Address already in use' error meaning

    This error means the network port the server wants is busy with another program.

  2. Step 2: Identify cause on Raspberry Pi

    Another process or server is already running on that port, blocking the new server.

  3. Final Answer:

    Another process is using the same port the server tries to bind. -> Option D

  4. Quick Check:

    Port conflict = Another process uses the port [OK]
Quick Trick: Port busy means another program uses it. [OK]
Common Mistakes:
MISTAKES
  • Blaming memory or syntax errors
  • Assuming internet affects port binding
  • Restarting Pi without checking running processes

Want More Practice?

15+ quiz questions · All difficulty levels · Free

Free Signup - Practice All Questions
More Raspberry Pi Quizzes
Automation and Scheduling - Email alerts on sensor thresholds - Quiz 7medium Data Logging and Databases - Why data logging matters for IoT - Quiz 9hard Data Logging and Databases - SQLite database for sensor data - Quiz 6medium MQTT for IoT - MQTT with QoS levels - Quiz 2easy MQTT for IoT - Publishing sensor data - Quiz 9hard MQTT for IoT - Why MQTT is the IoT standard - Quiz 9hard Security and Deployment - Headless deployment setup - Quiz 6medium Security and Deployment - Headless deployment setup - Quiz 15hard Security and Deployment - Backup and recovery strategies - Quiz 15hard Web Server and API - Controlling GPIO through web interface - Quiz 14medium