- A
--dry-run
Why wrong: --dry-run is a general flag used to simulate the command, not an argument to specify secret data.
- B
--from-literal
Why wrong: --from-literal passes key-value pairs directly on the command line, not from a file.
- C
--from-yaml
Why wrong: --from-yaml is not a valid argument for kubectl create secret. Kubernetes does not support this flag for secret creation.
- D
--from-file
--from-file reads a file's content and creates a secret entry with the filename as the key and the file content as the value. This is a valid method to create a secret from a file.
- E
--from-env-file
--from-env-file reads a file containing lines in key=value format and creates a secret from those entries. It works for both ConfigMaps and Secrets, making it a valid argument for creating a secret from a file.
Which kubectl Arguments to Create a Secret from a 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 TWO of the following are valid arguments for the kubectl command to create a secret from a file? (Select TWO)
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
--from-file
Options D and E are correct because both --from-file and --from-env-file are valid arguments for the kubectl create secret command when creating a secret from a file. --from-file reads the entire file content and uses the filename as the key. --from-env-file reads a file containing key=value lines, which is suitable for environment variable-style secrets. Option B (--from-literal) is incorrect because it specifies key-value pairs directly on the command line, not from a file. Option A (--dry-run) is a flag, not an argument for specifying secret data. Option C (--from-yaml) is not a valid argument for kubectl create secret.
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.
- ✗
--dry-run
Why it's wrong here
--dry-run is a general flag used to simulate the command, not an argument to specify secret data.
- ✗
--from-literal
Why it's wrong here
--from-literal passes key-value pairs directly on the command line, not from a file.
- ✗
--from-yaml
Why it's wrong here
--from-yaml is not a valid argument for kubectl create secret. Kubernetes does not support this flag for secret creation.
- ✓
--from-file
Why this is correct
--from-file reads a file's content and creates a secret entry with the filename as the key and the file content as the value. This is a valid method to create a secret from a file.
Related concept
Read the scenario before looking for a memorised answer.
- ✓
--from-env-file
Why this is correct
--from-env-file reads a file containing lines in key=value format and creates a secret from those entries. It works for both ConfigMaps and Secrets, making it a valid argument for creating a secret from a file.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The exam may trick candidates into selecting --from-literal (B) because they misinterpret 'from a file' as including inline data, or they may dismiss --from-env-file (E) believing it is only for ConfigMaps. Actually, --from-env-file works for both ConfigMaps and Secrets, so it is a valid method to create a secret from a file.
Trap categories for this question
Command / output trap
--dry-run is a general flag used to simulate the command, not an argument to specify secret data.
Detailed technical explanation
How to think about this question
Under the hood, `kubectl create secret generic` supports `--from-file`, `--from-literal`, and `--from-env-file` flags. The `--from-file` flag reads the file content as-is and stores it as a base64-encoded value in the Secret's `data` field, while `--from-literal` directly encodes the provided string. A subtle behavior is that `--from-file` can also accept a directory, creating a key for each file, and the key is the filename unless overridden with a custom key (e.g., `--from-file=mykey=./file.txt`).
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.
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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: --from-file — Options D and E are correct because both --from-file and --from-env-file are valid arguments for the kubectl create secret command when creating a secret from a file. --from-file reads the entire file content and uses the filename as the key. --from-env-file reads a file containing key=value lines, which is suitable for environment variable-style secrets. Option B (--from-literal) is incorrect because it specifies key-value pairs directly on the command line, not from a file. Option A (--dry-run) is a flag, not an argument for specifying secret data. Option C (--from-yaml) is not a valid argument for kubectl create secret.
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.
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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.
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