- A
Regional load balancer
Why wrong: Load balancers distribute traffic but do not replace unhealthy instances.
- B
Managed instance group (MIG)
MIG allows you to set autoscaling and autohealing policies.
- C
Autohealing (health checks)
Autohealing uses health checks to detect unhealthy instances and automatically recreate them.
- D
Cloud CDN
Why wrong: Cloud CDN caches content but does not manage instance health.
- E
Cloud NAT
Why wrong: Cloud NAT provides internet access for private instances, not health management.
Question 25 of 1,000
Cloud Digital Leader Fundamental Cloud Concepts Practice Question
This GCDL practice question tests your understanding of fundamental cloud concepts. 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.
An e-commerce platform uses Compute Engine to serve its website. During a flash sale, traffic spikes and some instances become unhealthy. The team wants to automatically replace unhealthy instances and maintain a minimum number of running instances. Which TWO features should they configure? (Choose 2)
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 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
✓
Managed instance group (MIG)
Managed instance groups (MIGs) provide autoscaling and autohealing. Autoscaling adjusts the number of instances based on load, and autohealing replaces unhealthy instances automatically.
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.
- ✗
Regional load balancer
Why it's wrong here
Load balancers distribute traffic but do not replace unhealthy instances.
- ✓
Managed instance group (MIG)
Why this is correct
MIG allows you to set autoscaling and autohealing policies.
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.
- ✓
Autohealing (health checks)
Why this is correct
Autohealing uses health checks to detect unhealthy instances and automatically recreate them.
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.
- ✗
Cloud CDN
Why it's wrong here
Cloud CDN caches content but does not manage instance health.
- ✗
Cloud NAT
Why it's wrong here
Cloud NAT provides internet access for private instances, not health management.
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
An e-commerce site experiences heavy traffic on Black Friday and near-zero traffic during off-peak weeks. Rather than provisioning permanent large VMs, the team uses auto-scaling groups that add capacity automatically under load and reduce it overnight. Questions like this test whether you understand elasticity, availability zones, and cloud compute scaling patterns.
What to study next
Got this wrong? Here's your next step.
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 GCDL NAT questions on configuration and troubleshooting.
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FAQ
Questions learners often ask
What does this GCDL question test?
Fundamental Cloud Concepts — This question tests Fundamental Cloud Concepts — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Managed instance group (MIG) — Managed instance groups (MIGs) provide autoscaling and autohealing. Autoscaling adjusts the number of instances based on load, and autohealing replaces unhealthy instances automatically.
What should I do if I get this GCDL 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 GCDL 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.
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Last reviewed: Jul 4, 2026
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