Bird
0
0

After configuring logging in Flask, you see duplicate log entries in your file. What is the most probable cause?

medium📝 Troubleshoot Q7 of 15
Flask - Deployment
After configuring logging in Flask, you see duplicate log entries in your file. What is the most probable cause?
AMultiple handlers are added to the logger without removing defaults
BThe log file is opened twice by the same handler
CThe Flask app is running multiple instances
DThe logging level is set to DEBUG
Step-by-Step Solution
Solution:

  1. Step 1: Understand how multiple handlers affect logging

    Adding multiple handlers without removing defaults causes duplicate logs.

  2. Step 2: Identify why duplicates appear in the file

    Each handler writes the same log, causing duplicates.

  3. Final Answer:

    Multiple handlers are added to the logger without removing defaults -> Option A

  4. Quick Check:

    Multiple handlers cause duplicate log entries [OK]
Quick Trick: Remove default handlers before adding new ones to avoid duplicates [OK]
Common Mistakes:
MISTAKES
  • Assuming file opened twice causes duplicates
  • Blaming multiple app instances without evidence
  • Thinking DEBUG level causes duplicates

Want More Practice?

15+ quiz questions · All difficulty levels · Free

Free Signup - Practice All Questions
More Flask Quizzes
Background Tasks - Task status monitoring - Quiz 6medium Background Tasks - Task status monitoring - Quiz 7medium Background Tasks - Defining Celery tasks - Quiz 10hard Deployment - Environment variable management - Quiz 3easy Deployment - Nginx as reverse proxy - Quiz 8hard Flask Ecosystem and Patterns - Application factory pattern deep dive - Quiz 6medium Flask Ecosystem and Patterns - Why patterns improve code quality - Quiz 14medium Security Best Practices - Password storage best practices - Quiz 6medium Testing Flask Applications - Testing with database - Quiz 5medium WebSocket and Real-Time - Server-Sent Events alternative - Quiz 13medium