This KCNA practice question tests your understanding of kubernetes fundamentals. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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 pod has resource requests: cpu: 250m, memory: 512Mi and limits: cpu: 500m, memory: 1Gi. If the container tries to use 600m CPU and 700Mi memory, what will happen?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The container will be throttled for CPU, but will not be killed because memory is within limits
If a container exceeds its CPU limit, it gets throttled (not killed). If it exceeds its memory limit, it is killed (OOMKilled). Here, CPU usage 600m exceeds limit 500m -> throttled; memory usage 700Mi is below limit 1Gi -> no OOM.
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.
✗
The container will be allowed to use the extra resources because limits are only soft constraints
Why it's wrong here
Limits are hard constraints; exceeding CPU leads to throttling, memory leads to termination.
✗
The container will be throttled for CPU and may be terminated if it continues to exceed the limit
Why it's wrong here
CPU exceeding limit causes throttling, not termination. Only memory limit violation leads to termination.
✓
The container will be throttled for CPU, but will not be killed because memory is within limits
Why this is correct
CPU above limit -> throttled; memory below limit -> no OOM kill.
Related concept
Static NAT maps one inside address to one outside address.
✗
The container will be killed immediately because it exceeded its CPU limit
Why it's wrong here
CPU limits do not cause termination; they cause throttling.
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 KCNA 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 KCNA NAT questions on configuration and troubleshooting.
Kubernetes Fundamentals — This question tests Kubernetes Fundamentals — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: The container will be throttled for CPU, but will not be killed because memory is within limits — If a container exceeds its CPU limit, it gets throttled (not killed). If it exceeds its memory limit, it is killed (OOMKilled). Here, CPU usage 600m exceeds limit 500m -> throttled; memory usage 700Mi is below limit 1Gi -> no OOM.
What should I do if I get this KCNA 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 KCNA 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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