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Monitor, configure, and optimize database resources →hardMultiple ChoiceObjective-mapped

DP-300 Practice Question: Monitor, configure, and optimize database resources

This DP-300 practice question tests your understanding of monitor, configure, and optimize database 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
{
  "properties": {
    "networkAcls": {
      "defaultAction": "Deny",
      "virtualNetworkRules": [
        {
          "id": "/subscriptions/.../virtualNetworks/vnet1/subnets/subnet1",
          "ignoreMissingVnetServiceEndpoint": false
        }
      ],
      "ipRules": []
    }
  }
}
```

You are configuring a private endpoint for an Azure SQL Database. The exhibit shows the current network ACLs. You need to ensure that only traffic from a specific subnet in VNet1 is allowed, and all other traffic is denied. What should you do?

Exhibit

Refer to the exhibit.

```json
{
  "properties": {
    "networkAcls": {
      "defaultAction": "Deny",
      "virtualNetworkRules": [
        {
          "id": "/subscriptions/.../virtualNetworks/vnet1/subnets/subnet1",
          "ignoreMissingVnetServiceEndpoint": false
        }
      ],
      "ipRules": []
    }
  }
}
```

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

✓

No changes needed; the configuration already meets the requirement.

The exhibit shows that the private endpoint is configured with a network ACL that has a deny-all default action and an explicit allow rule for the specific subnet in VNet1. Since private endpoints use network policies (like NSG rules) to filter traffic, and the ACL already denies all traffic except the allowed subnet, no changes are needed. The configuration meets the requirement because the private endpoint's network ACLs are evaluated in order, and the explicit allow for the subnet overrides the default deny for all other traffic.

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.

  • ✓

    No changes needed; the configuration already meets the requirement.

    Why this is correct

    Default deny with a VNet rule for the subnet allows only that subnet.

    Related concept

    Read the scenario before looking for a memorised answer.

  • ✗

    Add an IP rule to allow the subnet's IP range.

    Why it's wrong here

    Would allow that IP range, but the VNet rule already handles it; adding IP rule could allow other IPs.

  • ✗

    Set ignoreMissingVnetServiceEndpoint to true.

    Why it's wrong here

    Could allow traffic if the endpoint is missing, which is not secure.

  • ✗

    Change defaultAction to Allow.

    Why it's wrong here

    Would allow all traffic, contradicting the requirement.

Common exam traps

Common exam trap: answer the scenario, not the keyword

The trap here is that candidates may think they need to add an IP rule for the subnet's IP range (Option B) or change the default action to allow (Option D), not realizing that private endpoints use virtual network rules that already implicitly allow traffic from the subnet, and the default deny action is correct for restricting all other traffic.

Detailed technical explanation

How to think about this question

Private endpoints in Azure SQL Database use network ACLs that support virtual network rules (based on subnet IDs) and IP rules. The 'defaultAction' property controls the behavior for traffic that does not match any rule; setting it to 'Deny' ensures only explicitly allowed traffic passes. The private endpoint's network policy enforcement relies on the subnet's NSG and route tables, but the ACL itself is evaluated at the database firewall level, where virtual network rules take precedence over IP rules for traffic from the specified subnet.

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 healthcare organisation deploys an application with a public-facing web tier and a private database tier. The database subnet has no public IP and only accepts connections from the web tier's security group. Questions like this test whether you can design cloud network isolation using VNets/VPCs, subnets, and security group rules.

Visual reference

Source Router + ACL permit 10.0.0.0/8 deny any Server 10.0.0.5 ✓ 192.168.1.1 ✗ dropped ACLs evaluate top-down; first match wins — implicit deny all at end

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?

Monitor, configure, and optimize database resources — This question tests Monitor, configure, and optimize database resources — Read the scenario before looking for a memorised answer..

What is the correct answer to this question?

The correct answer is: No changes needed; the configuration already meets the requirement. — The exhibit shows that the private endpoint is configured with a network ACL that has a deny-all default action and an explicit allow rule for the specific subnet in VNet1. Since private endpoints use network policies (like NSG rules) to filter traffic, and the ACL already denies all traffic except the allowed subnet, no changes are needed. The configuration meets the requirement because the private endpoint's network ACLs are evaluated in order, and the explicit allow for the subnet overrides the default deny for all other traffic.

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: Jul 4, 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.