- A
kubectl apply -f db-password.txt
Why wrong: Incorrect. `kubectl apply -f` is used to apply a Kubernetes manifest (YAML/JSON) from a file, not to create a Secret from a plain text file. The file `db-password.txt` is not a valid Kubernetes manifest.
- B
kubectl create configmap db-password --from-file=db-password.txt
Why wrong: Incorrect. `kubectl create configmap` creates a ConfigMap, not a Secret. While the syntax is similar, Secrets and ConfigMaps are separate resources with different purposes and handling (e.g., Secrets are base64 encoded).
- C
kubectl create secret tls db-password --cert=db-password.txt
Why wrong: Incorrect. `kubectl create secret tls` is used to create a TLS Secret from a certificate and key file, not a generic password. The flag `--cert` specifies the certificate file, not a password file.
- D
kubectl create secret generic db-password --from-file=db-password.txt
Correct. `kubectl create secret generic` with `--from-file` creates a generic Secret where the content of the file is stored as a key-value pair. The key defaults to the filename, and the value is the file content.
Create Secret from File
This CKS practice question tests your understanding of minimize microservice vulnerabilities. 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.
Which kubectl command would you use to create a Secret from a file named 'db-password.txt'?
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
kubectl create secret generic db-password --from-file=db-password.txt
Option D is correct because `kubectl create secret generic` is the command to create a generic (opaque) Secret from a file using the `--from-file` flag. This reads the content of `db-password.txt` and stores it as a key-value pair in the Secret, where the key defaults to the filename. This is the standard method for creating a Secret from a plaintext file in Kubernetes.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
kubectl apply -f db-password.txt
Why it's wrong here
Incorrect. `kubectl apply -f` is used to apply a Kubernetes manifest (YAML/JSON) from a file, not to create a Secret from a plain text file. The file `db-password.txt` is not a valid Kubernetes manifest.
- ✗
kubectl create configmap db-password --from-file=db-password.txt
Why it's wrong here
Incorrect. `kubectl create configmap` creates a ConfigMap, not a Secret. While the syntax is similar, Secrets and ConfigMaps are separate resources with different purposes and handling (e.g., Secrets are base64 encoded).
- ✗
kubectl create secret tls db-password --cert=db-password.txt
Why it's wrong here
Incorrect. `kubectl create secret tls` is used to create a TLS Secret from a certificate and key file, not a generic password. The flag `--cert` specifies the certificate file, not a password file.
- ✓
kubectl create secret generic db-password --from-file=db-password.txt
Why this is correct
Correct. `kubectl create secret generic` with `--from-file` creates a generic Secret where the content of the file is stored as a key-value pair. The key defaults to the filename, and the value is the file content.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse `kubectl create secret generic` with `kubectl create configmap` (Option B) or misuse `kubectl apply -f` (Option A) for non-manifest files, failing to recognize that Secrets require explicit creation commands and are distinct from ConfigMaps in purpose and handling.
Trap categories for this question
Similar concept trap
Incorrect. `kubectl create configmap` creates a ConfigMap, not a Secret. While the syntax is similar, Secrets and ConfigMaps are separate resources with different purposes and handling (e.g., Secrets are base64 encoded).
Detailed technical explanation
How to think about this question
When using `--from-file=db-password.txt`, kubectl reads the file and creates a Secret with a data key named `db-password.txt` (the filename) and the file's content base64-encoded. Under the hood, the Secret object stores the value as a base64-encoded string in the `data` field, and Kubernetes automatically decodes it when mounted as a volume or exposed as an environment variable. A real-world scenario is storing database credentials; using a generic Secret with `--from-file` avoids manual base64 encoding and reduces the risk of exposing secrets in command history.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
TExam Day Tips
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A practitioner preparing for the CKS exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
- →
Minimize Microservice Vulnerabilities — study guide chapter
Learn the concepts, then practise the questions
- →
Minimize Microservice Vulnerabilities practice questions
Targeted practice on this topic area only
- →
All CKS questions
997 questions across all exam domains
- →
Certified Kubernetes Security Specialist CKS study guide
Full concept coverage aligned to exam objectives
- →
CKS practice test guide
How to use practice tests most effectively before exam day
Related practice questions
Related CKS practice-question pages
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
Monitoring Logging and Runtime Security practice questions
Practise CKS questions linked to Monitoring Logging and Runtime Security.
Cluster Setup and Hardening practice questions
Practise CKS questions linked to Cluster Setup and Hardening.
System Hardening practice questions
Practise CKS questions linked to System Hardening.
Minimize Microservice Vulnerabilities practice questions
Practise CKS questions linked to Minimize Microservice Vulnerabilities.
Supply Chain Security practice questions
Practise CKS questions linked to Supply Chain Security.
Monitoring, Logging and Runtime Security practice questions
Practise CKS questions linked to Monitoring, Logging and Runtime Security.
Cluster Setup practice questions
Practise CKS questions linked to Cluster Setup.
Cluster Hardening practice questions
Practise CKS questions linked to Cluster Hardening.
CKS fundamentals practice questions
Practise CKS questions linked to CKS fundamentals.
CKS scenario practice questions
Practise CKS questions linked to CKS scenario.
CKS troubleshooting practice questions
Practise CKS questions linked to CKS troubleshooting.
Practice this exam
Start a free CKS practice session
Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.
FAQ
Questions learners often ask
What does this CKS question test?
Minimize Microservice Vulnerabilities — This question tests Minimize Microservice Vulnerabilities — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: kubectl create secret generic db-password --from-file=db-password.txt — Option D is correct because `kubectl create secret generic` is the command to create a generic (opaque) Secret from a file using the `--from-file` flag. This reads the content of `db-password.txt` and stores it as a key-value pair in the Secret, where the key defaults to the filename. This is the standard method for creating a Secret from a plaintext file in Kubernetes.
What should I do if I get this CKS question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Same concept, more angles
1 more ways this is tested on CKS
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. Which command correctly creates a secret from a file named 'config.json'?
easy- A.kubectl create configmap my-secret --from-file=config.json
- ✓ B.kubectl create secret generic my-secret --from-file=config.json
- C.kubectl create secret tls my-secret --cert=config.json
- D.kubectl create secret generic my-secret --from-literal=config.json
Why B: Option B is correct because `kubectl create secret generic` with `--from-file=config.json` reads the file content and stores it as a key-value pair in the Secret, where the key defaults to the filename ('config.json') and the value is the raw file data. This is the standard method for creating a generic Secret from a file in Kubernetes.
Keep practising
More CKS practice questions
- Which flag is used to restrict the kubelet's ability to modify node status and pods?
- A Falco rule has priority `WARNING` and output: `Sensitive file opened (user=%user.name command=%proc.cmdline file=%fd.n…
- Falco detects a shell being opened inside a container. Which Falco rule field is used to specify the syscall condition f…
- A security audit reveals that a ServiceAccount named 'monitor' has a ClusterRoleBinding to the cluster-admin role. What…
- Match each Kubernetes security component to its description.
- Match each Kubernetes certificate type to its usage.
Last reviewed: Jul 4, 2026
This CKS practice question is part of Courseiva's free CNCF 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 CKS exam.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.