Question 164 of 144
SK0-005 server-administration Practice Question
A company wants to protect its Microsoft SQL Server database with a backup strategy that provides point-in-time recovery up to every 15 minutes. The database is critical and runs on a dedicated server. Which backup schedule should be implemented?
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
✓
Full backup weekly, differential daily, transaction log backups every 15 minutes.
Option B (Full backup weekly, differential daily, transaction log backups every 15 minutes) is correct because full and differential backups provide a base, while frequent transaction log backups enable granular point-in-time restore. Option A lacks transaction log backups, so recovery granularity is limited to daily. Option C uses mirroring, which is high availability (not a backup) and does not protect against logical corruption. Option D uses snapshot technology but snapshots alone are not a backup and may impact performance if taken every 15 minutes.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Use storage-level snapshots every 15 minutes on a SAN.
Why it's wrong here
Snapshots are not a substitute for database-aware backups; they may not capture in-flight transactions consistently and may cause performance overhead.
- ✗
Full backup daily, differential backup hourly.
Why it's wrong here
This schedule loses data between hourly differentials; it cannot achieve 15-minute point-in-time recovery without transaction logs.
- ✓
Full backup weekly, differential daily, transaction log backups every 15 minutes.
Why this is correct
Combining full, differential, and frequent transaction log backups allows restoration to any point in time down to the last log backup.
- ✗
Set up database mirroring with automatic failover and full weekly backups.
Why it's wrong here
Mirroring provides high availability, not point-in-time recovery; it does not replace regular transaction log backups needed for granular restore.
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Last reviewed: Jul 26, 2026
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