Improve: question144 answer

Author: danieldanielecki

README.md

@@ -1581,7 +1581,7 @@ We are so thankful for every contribution, which makes sure we can deliver top-n
 
 ### You have a Compute Engine instance hosting an application used between 9 AM and 6 PM on weekdays. You want to back up this instance daily for disaster recovery purposes. You want to keep the backups for 30 days. You want the Google-recommended solution with the least management overhead and the least number of services. What should you do?
 
-- [ ] 1. Update your instances' metadata to add the following value: snapshot"schedule: 0 1 * * * 2. Update your instances' metadata to add the following value: snapshot"retention: 30.
+- [ ] 1. Update your instances' metadata to add the following value: snapshot-schedule: 0 1 * * * 2. Update your instances' metadata to add the following value: snapshot-retention: 30.
 - [x] 1. In the Cloud Console, go to the Compute Engine Disks page and select your instance's disk. 2. In the Snapshot Schedule section, select Create Schedule and configure the following parameters: Schedule frequency: Daily. Start time: 1:00 AM - 2:00 AM. Autodelete snapshots after: 30 days.
 - [ ] 1. Create a Cloud Function that creates a snapshot of your instance's disk. 2. Create a Cloud Function that deletes snapshots that are older than 30 days. 3. Use Cloud Scheduler to trigger both Cloud Functions daily at 1:00 AM.
 - [ ] 1. Create a bash script in the instance that copies the content of the disk to Cloud Storage. 2. Create a bash script in the instance that deletes data older than 30 days in the backup Cloud Storage bucket. 3. Configure the instance's crontab to execute these scripts daily at 1:00 AM.