- A
Define liveness probes for all pods with a low failure threshold.
Why wrong: Liveness probes restart pods but do not remove them from the service endpoints; traffic may still be sent to restarting pods.
- B
Use pod anti-affinity to spread pods across nodes.
Why wrong: Anti-affinity improves availability but does not affect traffic routing to failed pods.
- C
Decrease the health check interval on the ALB target group to 2 seconds.
Why wrong: Decreasing the interval may reduce detection time but does not handle pod readiness during rolling updates.
- D
Configure readiness probes on the pods and set the ALB ingress controller to use the readiness probe endpoint.
Readiness probes ensure that only ready pods receive traffic; the ingress controller will stop sending traffic to pods that fail the probe.
Quick Answer
The answer is to configure readiness probes on the pods and set the ALB ingress controller to use the readiness probe endpoint. This works because readiness probes continuously check if a pod is ready to serve traffic; when a pod fails, the probe fails and immediately removes the pod from the service’s endpoint list, preventing new requests from being routed to it. On the AWS Certified DevOps Engineer Professional DOP-C02 exam, this scenario tests your understanding of how Kubernetes probes interact with AWS load balancers—a common trap is confusing readiness probes with liveness probes, which restart unhealthy pods but do not stop traffic routing during the failure window. Remember that readiness probes control traffic flow, while liveness probes control pod lifecycle; for minimizing traffic to failed pods in EKS, always think “readiness removes, liveness restarts.” A useful memory tip: “Readiness for routing, liveness for living.”
DOP-C02 Resilient Cloud Solutions Practice Question
This DOP-C02 practice question tests your understanding of resilient cloud solutions. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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.
A company runs a critical microservices application on Amazon EKS with multiple services. They use an ingress controller (ALB Ingress Controller) to route traffic to services. They notice that when a pod fails, new requests are still sent to the failed pod for a few seconds, causing errors. The health check interval is set to 5 seconds. They want to minimize the time during which failed pods receive traffic. They also need to ensure that during rolling updates, traffic is not sent to pods that are terminating. Which solution should they implement?
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
Configure readiness probes on the pods and set the ALB ingress controller to use the readiness probe endpoint.
Option D is correct because readiness probes detect when a pod is not ready to serve traffic and remove it from the service endpoints quickly. The ALB ingress controller respects readiness probes. Option A is incorrect because liveness probes restart pods but do not remove them from service immediately. Option B is incorrect because increasing the health check interval would make the situation worse. Option C is incorrect because pod anti-affinity affects scheduling, not traffic routing.
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.
- ✗
Define liveness probes for all pods with a low failure threshold.
Why it's wrong here
Liveness probes restart pods but do not remove them from the service endpoints; traffic may still be sent to restarting pods.
- ✗
Use pod anti-affinity to spread pods across nodes.
Why it's wrong here
Anti-affinity improves availability but does not affect traffic routing to failed pods.
- ✗
Decrease the health check interval on the ALB target group to 2 seconds.
Why it's wrong here
Decreasing the interval may reduce detection time but does not handle pod readiness during rolling updates.
- ✓
Configure readiness probes on the pods and set the ALB ingress controller to use the readiness probe endpoint.
Why this is correct
Readiness probes ensure that only ready pods receive traffic; the ingress controller will stop sending traffic to pods that fail the probe.
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 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. NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated. 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.
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 DOP-C02 NAT questions on configuration and troubleshooting.
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Resilient Cloud Solutions — study guide chapter
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FAQ
Questions learners often ask
What does this DOP-C02 question test?
Resilient Cloud Solutions — This question tests Resilient Cloud Solutions — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Configure readiness probes on the pods and set the ALB ingress controller to use the readiness probe endpoint. — Option D is correct because readiness probes detect when a pod is not ready to serve traffic and remove it from the service endpoints quickly. The ALB ingress controller respects readiness probes. Option A is incorrect because liveness probes restart pods but do not remove them from service immediately. Option B is incorrect because increasing the health check interval would make the situation worse. Option C is incorrect because pod anti-affinity affects scheduling, not traffic routing.
What should I do if I get this DOP-C02 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 DOP-C02 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: Jun 20, 2026
This DOP-C02 practice question is part of Courseiva's free Amazon Web Services 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 DOP-C02 exam.
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