This LPIC-1 practice question tests your understanding of gnu and unix commands. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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.
0022
Refer to the exhibit. What will be the default permissions of a newly created file using the touch command?
0022
-rw-r--r--
Correct: 666 - 022 = 644, giving owner read/write, group read, others read.
-rw-rw-rw-
Why wrong: This would require umask 000.
-rwxr-xr-x
Why wrong: This is the default for directories (777-022=755), not files.
-rw-rw-r--
Why wrong: This would require umask 002, not 022.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
-rw-r--r--
Default base permissions for a file are 666 (rw-rw-rw-). Subtracting the umask 022 gives 644 (rw-r--r--), which corresponds to option B.
Key principle: Count usable hosts — not total addresses — and remember that the network and broadcast addresses are not available to hosts in standard IPv4 subnets.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
-rw-r--r--
Why this is correct
Correct: 666 - 022 = 644, giving owner read/write, group read, others read.
Related concept
CIDR notation defines the prefix length.
-rw-rw-rw-
Why it's wrong here
This would require umask 000.
-rwxr-xr-x
Why it's wrong here
This is the default for directories (777-022=755), not files.
-rw-rw-r--
Why it's wrong here
This would require umask 002, not 022.
Common exam traps
Subnetting questions often tempt you into counting all addresses. In normal IPv4 subnets, the network and broadcast addresses are not usable host addresses.
Detailed technical explanation
Subnetting questions test whether you can identify the network, broadcast address, usable range, mask and correct subnet. Slow down enough to calculate the block size correctly.
Key takeaway
Count usable hosts — not total addresses — and remember that the network and broadcast addresses are not available to hosts in standard IPv4 subnets.
Real-world example
A network engineer segments a warehouse floor into three subnets: 20 scanners, 5 printers, and 2 management hosts. Picking the wrong mask wastes addresses or leaves too few usable hosts. Exam questions test whether you can apply CIDR notation, calculate block size, and identify the correct usable-host range for a given prefix.
What to study next
Review block sizes, usable host formulas (2^n − 2), and how to find network and broadcast addresses for /24 through /30. Then practise related LPIC-1 subnetting questions on CIDR, address ranges, and subnet selection.
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FAQ
GNU and Unix Commands — This question tests GNU and Unix Commands — CIDR notation defines the prefix length..
The correct answer is: -rw-r--r-- — Default base permissions for a file are 666 (rw-rw-rw-). Subtracting the umask 022 gives 644 (rw-r--r--), which corresponds to option B.
Review block sizes, usable host formulas (2^n − 2), and how to find network and broadcast addresses for /24 through /30. Then practise related LPIC-1 subnetting questions on CIDR, address ranges, and subnet selection.
CIDR notation defines the prefix length.
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Last reviewed: Jun 24, 2026
This LPIC-1 practice question is part of Courseiva's free LPI 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 LPIC-1 exam.
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