DP-300 Plan and implement data platform resources Practice Question
Exhibit
Refer to the exhibit.
```json
{
"type": "Microsoft.Sql/servers/databases/backupLongTermRetentionPolicies",
"apiVersion": "2021-11-01",
"properties": {
"weeklyRetention": "P4W",
"monthlyRetention": "P12M",
"yearlyRetention": "P5Y",
"weekOfYear": 16
}
}
```You are reviewing an ARM template snippet that configures a long-term retention (LTR) policy for an Azure SQL Database. Based on the exhibit, how long will weekly backups be retained?
⚠ Common exam trap
The trap is misinterpreting the ISO 8601 duration 'P4W'. 'P4W' represents 4 weeks, not 1 month (P1M), 4 days (P4D), or 4 years (P4Y). Many candidates mistakenly assume 'W' means something else or misread the number, leading to incorrect options like 4 days, 4 months, or 4 years.
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
✓
4 weeks. [CORRECT]
In the ARM template snippet, the weeklyRetention property is set to 'P4W' (ISO 8601 duration format), which means 4 weeks. Therefore, weekly backups are retained for exactly 4 weeks.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
4 weeks. [CORRECT]
Why this is correct
P4W in ISO 8601 duration means 4 weeks.
- ✗
4 days. [wrong]
Why it's wrong here
P4W means 4 weeks.
- ✗
4 months. [wrong]
Why it's wrong here
P4W means 4 weeks, not months.
- ✗
4 years. [wrong]
Why it's wrong here
P4W means 4 weeks.
Go deeper
Related to this question
Learn chapter
Overview of Azure Data Platform Options
Key term
Azure SQL Performance Tuning
Azure SQL Performance Tuning is the process of optimizing the speed and efficiency of queries and database operations in Microsoft Azure SQL Database or SQL Managed Instance to reduce latency and improve throughput.
Key term
Azure SQL Database Backup
Azure SQL Database Backup is a fully managed, automated service that creates and stores copies of your SQL database data and transaction logs in Azure storage, enabling point-in-time recovery and long-term retention for data protection and business continuity.
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