The answer is to deploy two Azure VMs in an availability set and configure a SQL Server Always On availability group with synchronous commit and automatic failover. This configuration meets the requirement for high availability with automatic failover and no data loss because synchronous replication ensures that every transaction is committed on both the primary and secondary replica before the primary acknowledges the commit, guaranteeing zero data loss during a planned patching event. On the DP-300 exam, this scenario tests your understanding of the trade-offs between availability groups and failover cluster instances (FCI); a common trap is choosing FCI with Storage Spaces Direct, which lacks automatic failover for planned maintenance, or log shipping, which is manual. Remember the key distinction: for automatic failover and zero data loss on Azure VMs, Always On availability groups with synchronous commit are your go-to, while FCI requires shared storage and manual intervention for patching. Memory tip: “Sync for safety, auto for action” — synchronous commit ensures no data loss, and automatic failover handles patching seamlessly.
DP-300 Practice Question: Plan and configure a high availability and disaster recovery environment
This DP-300 practice question tests your understanding of plan and configure a high availability and disaster recovery environment. 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.
Your company has a SQL Server on Azure VM hosting a critical database. You need to ensure high availability with automatic failover and no data loss during a planned patching event. The solution must minimize cost. Which configuration should you use?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "minimum / minimize"
Why it matters: Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Deploy two Azure VMs in an availability set, configure SQL Server Always On availability group with synchronous commit and automatic failover.
Option A is correct because SQL Server Always On availability groups with synchronous replication and automatic failover meet the requirement of no data loss and automatic failover. Option B is wrong because FCI with Storage Spaces Direct does not provide automatic failover for planned patching. Option C is wrong because log shipping is not automatic. Option D is wrong because Azure SQL Database Managed Instance is not for SQL Server on Azure VM.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Migrate to Azure SQL Database Managed Instance and configure geo-replication.
Why it's wrong here
The requirement specifies SQL Server on Azure VM, not Managed Instance.
✗
Configure log shipping with a secondary VM in another region.
Why it's wrong here
Log shipping requires manual failover and does not provide automatic failover.
✗
Use a single VM with a failover cluster instance (FCI) using Storage Spaces Direct.
Why it's wrong here
FCI does not provide automatic failover for planned patching; manual failover is needed.
✓
Deploy two Azure VMs in an availability set, configure SQL Server Always On availability group with synchronous commit and automatic failover.
Why this is correct
Synchronous replication ensures zero data loss; automatic failover works for planned patching.
Clue confirmation
The clue word "minimum / minimize" in the question point toward this answer.
Related concept
Static NAT maps one inside address to one outside address.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
Static NAT maps one inside address to one outside address.
PAT allows many inside hosts to share one public address using ports.
Inside local and inside global describe the private and translated addresses.
NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
→Identify inside and outside interfaces first.
→Check whether the scenario needs static NAT, dynamic NAT or PAT.
→Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Real-world example
How this comes up in practice
A startup's cloud architect reviews their monthly bill and notices costs are higher than expected for a long-running batch job. Switching from on-demand instances to Reserved Instances — or using Spot/Preemptible VMs — can reduce compute costs by up to 72 %. Questions like this test whether you understand the tradeoffs between commitment, flexibility, and cost across cloud pricing models.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this DP-300 question in full detail.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related DP-300 NAT questions on configuration and troubleshooting.
Plan and configure a high availability and disaster recovery environment — This question tests Plan and configure a high availability and disaster recovery environment — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Deploy two Azure VMs in an availability set, configure SQL Server Always On availability group with synchronous commit and automatic failover. — Option A is correct because SQL Server Always On availability groups with synchronous replication and automatic failover meet the requirement of no data loss and automatic failover. Option B is wrong because FCI with Storage Spaces Direct does not provide automatic failover for planned patching. Option C is wrong because log shipping is not automatic. Option D is wrong because Azure SQL Database Managed Instance is not for SQL Server on Azure VM.
What should I do if I get this DP-300 question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related DP-300 NAT questions on configuration and troubleshooting.
Are there clue words in this question I should notice?
Yes — watch for: "minimum / minimize". Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
About these practice questions
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These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. Your company has a SQL Server on Azure VM running a critical database. The VM is in a single availability set. You need to achieve a Recovery Point Objective (RPO) of 5 minutes and a Recovery Time Objective (RTO) of 15 minutes in case of an Azure region failure. What should you implement?
hard
A.Configure SQL Server Always On Availability Groups with synchronous commit to a secondary VM in another region.
✓ B.Configure Azure Site Recovery to replicate the VM to a secondary region.
C.Use Azure Backup with daily backups and geo-restore.
D.Store database files on geo-redundant storage (GRS) and enable auto-failover.
Why B: Option A is correct because Azure Site Recovery can replicate the VM to another region and provide the required RPO and RTO. Option B is wrong because Always On Availability Groups on Azure VMs require at least two VMs and a witness, and may not achieve 5-minute RPO without synchronous commit (which adds latency). Option C is wrong because Azure Backup has typical RPO of 24 hours for daily backups. Option D is wrong because geo-redundant storage does not provide application-consistent recovery.
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