This CKA practice question tests your understanding of workloads and scheduling. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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 StatefulSet named 'db' manages 3 pods. The pods are named db-0, db-1, db-2. What is the expected behavior when the StatefulSet's pod management policy is set to OrderedReady and you scale down from 3 to 1 replica?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Pod db-2 is deleted, then db-1, and db-0 remains.
With OrderedReady pod management, StatefulSet deletion proceeds in reverse ordinal order, waiting for each pod to terminate before moving to the next. So it deletes db-2, then db-1, and stops at 1 replica (db-0 remains).
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.
✗
All pods are deleted simultaneously.
Why it's wrong here
OrderedReady deletes one at a time in reverse order.
✓
Pod db-2 is deleted, then db-1, and db-0 remains.
Why this is correct
Correct: deletion in reverse order, one at a time.
Related concept
Static NAT maps one inside address to one outside address.
✗
Only pod db-2 is deleted; db-1 and db-0 remain.
Why it's wrong here
The scale-down stops at 1 replica, so db-0 remains after deleting db-2 and db-1.
✗
Pod db-0 is deleted first, then db-1, and db-2 remains.
Why it's wrong here
Deletion is in reverse ordinal order, not forward.
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 small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this CKA 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 CKA NAT questions on configuration and troubleshooting.
Workloads and Scheduling — This question tests Workloads and Scheduling — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Pod db-2 is deleted, then db-1, and db-0 remains. — With OrderedReady pod management, StatefulSet deletion proceeds in reverse ordinal order, waiting for each pod to terminate before moving to the next. So it deletes db-2, then db-1, and stops at 1 replica (db-0 remains).
What should I do if I get this CKA 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 CKA 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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