ISC2 CC Business Continuity, DR & Incident Response Practice Question
Exhibit
BackupPolicy: Source: /srv/db Destination: s3://backup-bucket/daily/ Schedule: 0 2 * * * Encryption: AES-256 Retention: 30 days Tests: Quarterly
Refer to the exhibit. An administrator needs to restore a database file from two weeks ago, but the backup log shows success. What is the most likely reason the file cannot be restored?
⚠ Common exam trap
ISC2 often tests the misconception that a successful backup log guarantees all intended data was backed up, when in reality the backup source configuration determines what is actually captured.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The backup source did not include that file
The backup log only records the success or failure of the backup job as a whole, not the inclusion of every individual file. If the database file was not selected in the backup source configuration (e.g., a file-level backup job that excluded the database directory or a volume shadow copy that did not include the file), the backup would complete successfully without backing up that file. When the administrator attempts to restore, the file is missing from the backup set, even though the job log shows success.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
The retention policy deleted it
Why it's wrong here
Retention is 30 days, so two-week-old backups should exist.
- ✗
The schedule was incorrect
Why it's wrong here
Backup logs show success, indicating the schedule ran correctly.
- ✓
The backup source did not include that file
Why this is correct
Only files under /srv/db are backed up; the needed file might be elsewhere.
- ✗
The encryption key changed
Why it's wrong here
Encryption key issues would likely cause restore failure, but backup logs show success.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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