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Plan and implement data platform resources →mediumMultiple ChoiceObjective-mapped

Quick Answer

The answer is 4 weeks. This is correct because the ARM template snippet sets the weeklyRetention property to 'P1M', which is an ISO 8601 duration format where 'P' denotes the period and '1M' means one month. In Azure SQL Database long-term retention policy, the ISO 8601 standard interprets 'P1M' as a monthly interval, and for weekly backup retention, one month is consistently treated as approximately 4 weeks. On the Microsoft Azure Database Administrator Associate DP-300 exam, this concept tests your ability to read ARM template configurations and understand how ISO 8601 durations map to actual retention periods—a common trap is confusing 'P1M' with 30 days or assuming it means exactly one calendar month, but Azure's LTR policy simplifies it to 4 weeks for weekly backups. A useful memory tip: think of 'P1M' as "Period 1 Month" and remember that for weekly retention, a month always rounds down to 4 weeks, not 30 days.

DP-300 Plan and implement data platform resources Practice Question

This DP-300 practice question tests your understanding of plan and implement data platform resources. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.

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?

Question 1mediummultiple choice
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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
  }
}
```

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.

In the ARM template snippet, the weeklyRetention property is set to 'P1M' (ISO 8601 duration format), which means 1 month. Since a month is approximately 4 weeks, weekly backups are retained for 4 weeks. The LTR policy uses ISO 8601 durations, where 'P1M' explicitly specifies a monthly retention period.

Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.

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.

    Why this is correct

    P4W in ISO 8601 duration means 4 weeks.

    Related concept

    Read the scenario before looking for a memorised answer.

  • ✗

    4 days.

    Why it's wrong here

    P4W means 4 weeks.

  • ✗

    4 months.

    Why it's wrong here

    P4W means 4 weeks, not months.

  • ✗

    4 years.

    Why it's wrong here

    P4W means 4 weeks.

Common exam traps

Common exam trap: answer the scenario, not the keyword

The trap here is that candidates may confuse the ISO 8601 duration 'P1M' with a count of weeks, days, or years, leading them to select 4 weeks, 4 days, 4 months, or 4 years without recognizing that 'P1M' explicitly means 1 month, not 4 of any other unit.

Detailed technical explanation

How to think about this question

Azure SQL Database LTR policies use ISO 8601 duration strings (e.g., P1M, P4W, P1Y) to define retention periods for weekly, monthly, and yearly backups. The weeklyRetention value 'P1M' is interpreted as a calendar month, which is approximately 4 weeks but can vary between 28 and 31 days. Under the hood, Azure Backup calculates the exact retention based on the backup schedule and the duration specified, ensuring backups are retained for at least the specified period. In real-world scenarios, using 'P4W' instead of 'P1M' would guarantee exactly 28 days of retention, which can be critical for compliance with strict retention requirements.

KKey Concepts to Remember

  • Read the scenario before looking for a memorised answer.
  • Find the constraint that changes the correct option.
  • Eliminate answers that are true in general but not in this case.

TExam Day Tips

  • Watch for words such as best, first, most likely and least administrative effort.
  • Review why wrong options are wrong, not only why the correct option is correct.

Key takeaway

Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.

Real-world example

How this comes up in practice

A cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.

What to study next

Got this wrong? Here's your next step.

Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.

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FAQ

Questions learners often ask

What does this DP-300 question test?

Plan and implement data platform resources — This question tests Plan and implement data platform resources — Read the scenario before looking for a memorised answer..

What is the correct answer to this question?

The correct answer is: 4 weeks. — In the ARM template snippet, the weeklyRetention property is set to 'P1M' (ISO 8601 duration format), which means 1 month. Since a month is approximately 4 weeks, weekly backups are retained for 4 weeks. The LTR policy uses ISO 8601 durations, where 'P1M' explicitly specifies a monthly retention period.

What should I do if I get this DP-300 question wrong?

Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.

What is the key concept behind this question?

Read the scenario before looking for a memorised answer.

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Last reviewed: Jun 24, 2026

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This DP-300 practice question is part of Courseiva's free Microsoft certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the DP-300 exam.