Module 2 challenge: Performance Tuning in Python Scripts :Troubleshooting and Debugging Techniques (Google IT Automation with Python Professional Certificate) Answers 2025

1. Primary reason the backup script takes over 20 hours
❌ The script is network-bound
❌ The script is CPU-bound
❌ The script is memory-bound
✔️ The script is I/O-bound

2. Best description of rsync
❌ rsync is a networking monitoring tool
❌ rsync duplicates all files without checking for changes
✔️ rsync efficiently transfers/syncs files by comparing modification time and size
❌ rsync controls administrative user access

3. Purpose of psutil.disk_io_counters()
❌ Configure network interface parameters
❌ Monitor real-time network traffic
✔️ Retrieve disk I/O statistics
❌ Estimate file space usage

4. Compressing files improved script efficiency
❌ False
✔️ True

5. Performance metrics explored (select all that apply)
✔️ Monitoring network bandwidth
❌ Checking power consumption
❌ Analyzing GPU performance
✔️ Checking CPU usage

6. Meaning of psutil.cpu_percent() = 0.6
❌ CPU at 60%
❌ 0.6 cores available
✔️ CPU utilization is 0.6%, very low
❌ Function error

7. Purpose of Pool class in multiprocessing
❌ Create a single process per task
✔️ Manage a pool of worker processes
❌ Synchronize execution of processes
❌ Limit CPU usage

8. Module/method to execute rsync command in Python
❌ os module with system()
❌ rsync module with sync()
✔️ subprocess module with call()
❌ files module with copy()

9. Correct rsync command with verbose output
❌ rsync /home/user/docs /backup/docs -v
❌ rsync -v /backup/docs /home/user/docs
✔️ rsync -v /home/user/docs /backup/docs
❌ rsync /backup/docs /home/user/docs

10. Does multisync.py backup sequentially?
✔️ True
❌ False

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