010-160 Practice Test 12 — 15 Questions

Question 1

A startup company is deciding between a Community-driven distribution and an Enterprise distribution. Which scenario best justifies choosing an Enterprise distribution?

Accepted Answer

The company needs long-term stability and guaranteed vendor support for critical infrastructure.. Enterprise distributions (e.g., RHEL, SLES) provide long-term support lifecycles, certified hardware/software stacks, and vendor-backed SLAs — exactly what critical infrastructure needs. A startup running production systems that cannot tolerate unscheduled breakage should choose an Enterprise distro to get guaranteed security patches and support channels. This directly matches the requirement for stability and vendor accountability.

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The development team wants zero cost for the distribution and documentation.

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The company wants to actively contribute to the kernel source code directly.

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The project requires the absolute latest software features released daily.

Question 2

An administrator is comparing package management systems. Which tool is primarily used on RHEL-based distributions for resolving dependencies and downloading packages?

Accepted Answer

DNF. DNF (Dandified YUM) is the default high-level package manager on modern RHEL-based distributions (RHEL 8+, Fedora, CentOS Stream, Rocky, AlmaLinux). It resolves dependencies using the libsolv library and downloads packages from configured repositories, replacing the older YUM tool while maintaining CLI compatibility.

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Pacman

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Portage

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APT

Question 3

A system administrator is checking for hardware errors in the logs. Where are general system messages usually stored?

Accepted Answer

/var/log/syslog. General system messages on most Linux distributions are written to /var/log/syslog (Debian/Ubuntu) or /var/log/messages (RHEL/CentOS). The /var/log directory is the standard location for system and application logs, and syslog is the traditional catch-all for kernel, daemon, and service messages.

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/etc/log/

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/proc/logs

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/tmp/logs

Question 4

Which of the following is considered a 'downstream' consumer of the Linux kernel?

Accepted Answer

An Ubuntu Linux distribution. A downstream consumer is an entity that takes the upstream Linux kernel source and builds derivative products from it. Ubuntu takes kernel source from kernel.org (upstream), applies its own patches, and ships it as a distribution — making it a classic downstream consumer.

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Linus Torvalds

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The GCC Compiler project

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The Linux Kernel Mailing List

Question 5

Which permission bit must be set on a directory to allow a user to enter the directory and access files within it?

Accepted Answer

Execute (x). The execute (x) bit on a directory grants the right to traverse it — that is, to access files and subdirectories by name within it. Without x, even if you have read permission, you cannot cd into the directory or open files whose paths pass through it.

Answer

Write (w)

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Sticky bit

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Read (r)

Question 6

You notice a file has permissions listed as '-rwsr-xr-x'. What does the 's' in the owner's position indicate?

Accepted Answer

The file is a setuid binary.. The 's' in the owner's execute position (the fourth character of the permission string) indicates the setuid bit is set. When a setuid binary is executed, the process runs with the effective UID of the file's owner rather than the invoking user, which is how tools like /usr/bin/passwd let ordinary users modify /etc/shadow. The lowercase 's' means the underlying execute bit is also set; an uppercase 'S' would mean setuid is set but execute is not.

Answer

The file is a setgid binary.

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The file is immutable.

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The file is a sticky directory.

Question 7

You need to create a compressed archive of the '/home/user/docs' directory named 'docs.tar.gz'. Which flag ensures gzip compression is applied?

Accepted Answer

tar -czf docs.tar.gz /home/user/docs. The `-czf` flag combination in `tar` specifies: `-c` to create a new archive, `-z` to filter the archive through gzip for compression, and `-f` to specify the archive filename. This directly produces a gzip-compressed tarball named `docs.tar.gz` from the `/home/user/docs` directory. The `-z` flag is the key to invoking gzip compression, which is exactly what the question asks for.

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tar -jf docs.tar.gz /home/user/docs

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tar -xzf docs.tar.gz /home/user/docs

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tar -cf docs.tar.gz /home/user/docs

Question 8

Which of the following describes the 'upstream' concept in Linux software development?

Accepted Answer

The original developers and project repositories for a piece of software.. In Linux and open-source development, 'upstream' refers to the original project maintainers and their canonical source repositories — the place where code is authored, reviewed, and released. Downstream consumers (distributions, vendors, forks) pull from upstream and may carry patches, but the upstream project is the source of truth.

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The kernel configuration files located in /etc/.

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The servers where users download their Linux distributions.

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The physical location of the data centers hosting the software.

Question 9

Your company is considering moving from proprietary software to open source solutions. Which aspect of the GPL license is most restrictive regarding the distribution of modified code?

Accepted Answer

You must release the source code of any derivative works if you distribute the binaries.. The GPL's core copyleft obligation is that if you distribute binaries of a derivative work, you must also make the complete corresponding source code available under the same GPL terms. This 'viral' requirement is what makes the GPL more restrictive than permissive licenses like MIT or BSD when distributing modified code.

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You must contribute all modifications back to the original project maintainer.

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You are not allowed to modify the source code for internal business use.

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You are forbidden from selling any software that uses GPL code.

Question 10

You want to change the owner of 'data.txt' from 'user1' to 'user2' AND the group from 'group1' to 'group2' in one command. Which is correct?

Accepted Answer

chown user2:group2 data.txt. The chown command accepts the syntax 'chown user:group file' to change both owner and group in a single invocation. Using the colon as a separator between user and group is the canonical POSIX form, and chown also accepts a dot (chown user.group file) on most Linux systems. Option C is the only choice that correctly combines both changes into one valid command.

Answer

chown user2 -g group2 data.txt

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chown user2 group2 data.txt

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chown user2 data.txt && chgrp group2 data.txt

Question 11

A team is choosing a Linux distribution for a high-performance cluster (HPC). What is a primary consideration for this choice?

Accepted Answer

The ability to optimize the kernel and libraries for specific hardware performance.. HPC clusters demand maximum throughput and low latency, so the ability to tune the kernel (scheduler, hugepages, NUMA, network stack) and compile libraries against specific CPU instruction sets (AVX-512, MPI implementations) is the decisive factor. Distributions like RHEL, Rocky, or specialized ones (e.g., with OFED drivers) are chosen for this tunability.

Answer

The distribution must not use the Linux kernel.

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Ensuring the OS is pre-installed with popular office productivity software.

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The availability of a user-friendly desktop environment for all cluster nodes.

Question 12

Which command removes a directory and all its contents recursively?

Accepted Answer

rm -rf dir. rm -rf dir removes the directory and everything inside it recursively (-r) and forcibly (-f), without prompting. This is the standard command to delete a directory tree. The other options either don't exist, don't recurse, or only remove empty directories.

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rm -d dir

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del -r dir

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rmdir dir

Question 13

You want to find all occurrences of the string 'ERROR' within the 'syslog' file. Which command is most appropriate?

Accepted Answer

grep 'ERROR' syslog. 'grep' (global regular expression print) searches a file or input stream for lines matching a pattern and prints them. Running 'grep ERROR syslog' scans the syslog file and outputs every line containing 'ERROR', which is exactly the task described.

Answer

cat 'ERROR' syslog

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find 'ERROR' syslog

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sed 'ERROR' syslog

Question 14

Which THREE of the following tools can be used for text processing?

Accepted Answer

awk. awk (A) is a full-featured text-processing language and utility that scans input line by line, splits fields, and performs pattern-action processing, making it a core text-processing tool. grep (B) is a text-processing tool because it searches input streams or files for lines matching a regular expression and prints the matching lines. sed (C) is a stream editor that performs text transformations such as substitution, deletion, and insertion on input streams, so it is also a text-processing tool. The unmarked options do not belong: cat (D) simply concatenates and outputs file contents without transforming or analyzing text, and ls (E) lists directory entries rather than processing text.

Answer

cat

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ls

Question 15

You need to display the contents of a file named 'config.txt' directly to your terminal screen. Which command should you use?

Accepted Answer

cat config.txt. The `cat` command (concatenate) reads one or more files and writes their contents to standard output, which by default is the terminal. Running `cat config.txt` therefore prints the entire file to the screen in one pass, exactly matching the requirement to display file contents directly. It is the canonical tool for this purpose on Linux.

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head config.txt

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echo config.txt

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grep config.txt