This EX200 practice question tests your understanding of manage users and groups. 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 system administrator needs to ensure that the user 'jdoe' can read files in the shared directory /project/data which is owned by group 'project'. The user 'jdoe' is currently not a member of the 'project' group. Which TWO steps should the administrator take to add 'jdoe' to the 'project' group? (Choose two.)
Why wrong: Incorrect: groupmod does not have an -A option; the correct syntax for groupmod is different.
C
vigr to add jdoe to project group
Why wrong: Incorrect: vigr is for editing /etc/group manually, but is not a direct command to add a user; it is error-prone and not recommended for routine group membership changes.
D
useradd -G project jdoe
Why wrong: Incorrect: useradd is for new users; using it on an existing user would require -M and is not the standard approach.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
gpasswd -a jdoe project
The correct options are A and B. usermod -aG project jdoe appends the user to the supplementary group without removing existing group memberships. gpasswd -a jdoe project also adds the user to the group. Option C (useradd -G) is incorrect because useradd is for creating new users, not modifying existing ones; using it would require the -M option and still is not appropriate. Option D (groupmod -A) is invalid syntax; groupmod does not have an -A option. Option E (vigr) is for manually editing group files, but it is not a direct command to add a user to a group; it would require manual file editing which is error-prone and not recommended.
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.
✓
gpasswd -a jdoe project
Why this is correct
Correct: adds user to the specified group.
Related concept
Read the scenario before looking for a memorised answer.
✗
groupmod -A jdoe project
Why it's wrong here
Incorrect: groupmod does not have an -A option; the correct syntax for groupmod is different.
✗
vigr to add jdoe to project group
Why it's wrong here
Incorrect: vigr is for editing /etc/group manually, but is not a direct command to add a user; it is error-prone and not recommended for routine group membership changes.
✗
useradd -G project jdoe
Why it's wrong here
Incorrect: useradd is for new users; using it on an existing user would require -M and is not the standard approach.
✓
usermod -aG project jdoe
Why this is correct
Correct: appends user to supplementary group.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Trap categories for this question
Command / output trap
Incorrect: vigr is for editing /etc/group manually, but is not a direct command to add a user; it is error-prone and not recommended for routine group membership changes.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→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 EX200 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 EX200 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Manage users and groups — This question tests Manage users and groups — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: gpasswd -a jdoe project — The correct options are A and B. usermod -aG project jdoe appends the user to the supplementary group without removing existing group memberships. gpasswd -a jdoe project also adds the user to the group. Option C (useradd -G) is incorrect because useradd is for creating new users, not modifying existing ones; using it would require the -M option and still is not appropriate. Option D (groupmod -A) is invalid syntax; groupmod does not have an -A option. Option E (vigr) is for manually editing group files, but it is not a direct command to add a user to a group; it would require manual file editing which is error-prone and not recommended.
What should I do if I get this EX200 question wrong?
Identify which EX200 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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