CKAD Practice Exam Questions | Kubernetes Application Developer

Solution:

Solution:

Below are the exact steps/commands you can run.

1) Locate the Deployment and its namespace

kubectl get deploy -A | grep nginx-resources

You should see output like:

nginx-resources ...

Set a variable (replace with what you see):

NS=

Confirm replicas:

kubectl -n $NS get deploy nginx-resources -o jsonpath='{.spec.replicas}{"\n"}'

2) Check if there is a ResourceQuota in that namespace

kubectl -n $NS get resourcequota

kubectl -n $NS describe resourcequota

If there is a quota, note these fields (common ones):

requests.cpu

requests.memory

limits.cpu

limits.memory

3) Decide requests/limits for the Deployment (example values)

If the question (in your environment) provides specific values, use those.

If it doesn’t, a typical safe pair is:

requests: cpu: 100m, memory: 128Mi

limits: cpu: 200m, memory: 256Mi

I’ll proceed with these example values. If your lab specifies different numbers, just swap them in.

4) Update the existing Deployment (DO NOT DELETE)

Option A (fastest): kubectl set resources

Assuming the container name is the first container (we’ll detect it):

kubectl -n $NS get deploy nginx-resources -o jsonpath='{.spec.template.spec.containers[*].name}{"\n"}'

If it prints a single container name, set it like this:

kubectl -n $NS set resources deploy nginx-resources \

--requests=cpu=100m,memory=128Mi \

--limits=cpu=200m,memory=256Mi

Verify the Deployment now has resources

kubectl -n $NS get deploy nginx-resources -o jsonpath='{.spec.template.spec.containers[0].resources}{"\n"}'

5) Compute the total resources requested by the Deployment

Get replicas:

REPLICAS=$(kubectl -n $NS get deploy nginx-resources -o jsonpath='{.spec.replicas}')

echo $REPLICAS

6) Ensure the namespace quota matches (or exceeds) those totals

This is the part the question warns about: if the quota is too low, the Deployment update will fail to roll out.

6.1 If a ResourceQuota already exists

Patch it to allow at least the totals you calculated.

First, identify quota name:

RQ=$(kubectl -n $NS get resourcequota -o jsonpath='{.items[0].metadata.name}')

echo $RQ

Then patch (example: replicas=2 → requests.cpu=200m, requests.memory=256Mi):

kubectl -n $NS patch resourcequota $RQ --type='merge' -p '{

"spec": {

"hard": {

"requests.cpu": "200m",

"requests.memory": "256Mi",

"limits.cpu": "400m",

"limits.memory": "512Mi"

}

}

}'

Adjust those numbers to your replicas × request, and replicas × limit (if your quota also enforces limits).

6.2 If there is NO ResourceQuota

Create one that matches the Deployment max request totals.

Example for replicas=2 with our sample requests/limits:

cat <

apiVersion: v1

kind: ResourceQuota

metadata:

name: nginx-resources-quota

spec:

hard:

requests.cpu: "200m"

requests.memory: "256Mi"

limits.cpu: "400m"

limits.memory: "512Mi"

EOF

7) Verify rollout succeeds

kubectl -n $NS rollout status deploy nginx-resources

kubectl -n $NS get pods

Verify the running pods actually have the requests/limits:

kubectl -n $NS get pod -l app=nginx-resources -o jsonpath='{range .items[*]}{.metadata.name}{" "}{.spec.containers[0].resources}{"\n"}{end}'

(If the label selector app=nginx-resources doesn’t exist, just pick a pod name from kubectl get pods and run:)

kubectl -n $NS describe pod | sed -n '/Limits:/,/Requests:/p'

Common reasons this fails (and the fix)

Rollout stuck / pods pending with “exceeded quota”Check:

kubectl -n $NS describe pod

kubectl -n $NS describe resourcequota

Fix: increase ResourceQuota hard values to match required totals.

You set requests higher than quota allowsFix: either reduce requests or raise quota.

kubectl get deploy -A | grep nginx-resources

kubectl -n get deploy nginx-resources -o jsonpath='{.spec.replicas}{"\n"}{.spec.template.spec.containers[0].name}{"\n"}'

kubectl -n describe resourcequota