AZ-400 Design and implement a DevOps infrastructure Practice Question
This AZ-400 practice question tests your understanding of design and implement a devops infrastructure. 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.
Which TWO of the following are benefits of using Infrastructure as Code (IaC) over manual infrastructure management?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Consistent environment provisioning
Options B and C are correct. Option B is correct because IaC ensures consistent environments. Option C is correct because IaC reduces configuration drift. Option A is wrong because IaC does not reduce cost. Option D is wrong because IaC requires training. Option E is wrong because IaC does not eliminate testing.
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.
✓
Consistent environment provisioning
Why this is correct
IaC ensures environments are created from the same definition.
Related concept
Static NAT maps one inside address to one outside address.
✓
Reduced configuration drift
Why this is correct
IaC allows automated remediation of drift.
Related concept
Static NAT maps one inside address to one outside address.
✗
Removes the need for testing
Why it's wrong here
Testing is still required for IaC templates.
✗
Eliminates the need for documentation
Why it's wrong here
IaC code serves as documentation but doesn't eliminate all documentation needs.
✗
Lower infrastructure costs
Why it's wrong here
IaC does not directly lower costs; it improves consistency and repeatability.
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 AZ-400 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 AZ-400 NAT questions on configuration and troubleshooting.
Design and implement a DevOps infrastructure — This question tests Design and implement a DevOps infrastructure — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Consistent environment provisioning — Options B and C are correct. Option B is correct because IaC ensures consistent environments. Option C is correct because IaC reduces configuration drift. Option A is wrong because IaC does not reduce cost. Option D is wrong because IaC requires training. Option E is wrong because IaC does not eliminate testing.
What should I do if I get this AZ-400 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 AZ-400 NAT questions on configuration and troubleshooting.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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Question Discussion
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