010-160 Practice Test 2 — 30 Questions

Question 1

Which TWO commands are commonly used to check network connectivity to a host?

Accepted Answer

ping. ping and traceroute are the primary tools for diagnosing network connectivity issues.

Answer

arp

Answer

fdisk

Answer

ssh

Question 2

Which TWO of the following are valid ways to list directory contents?

Accepted Answer

ls. ls and dir are both valid commands for listing files.

Answer

pwd

Answer

cd

Answer

cat

Question 3

Which entity is responsible for the overall maintenance and development of the Linux kernel?

Accepted Answer

Linux Foundation. The Linux Foundation and Linus Torvalds coordinate the development of the Linux kernel.

Answer

Debian Project

Answer

Free Software Foundation

Answer

Canonical

Question 4

When evaluating Linux distributions, what distinguishes a 'rolling release' distribution from a 'fixed release' distribution?

Accepted Answer

Rolling releases provide continuous updates, while fixed releases use a versioned lifecycle.. Rolling releases receive updates continuously, providing the latest software, while fixed releases have scheduled versions with stable software packages.

Answer

Fixed releases are only available for server environments.

Answer

Rolling releases require a complete wipe and reinstall for every update.

Answer

Rolling releases are always more secure than fixed releases.

Question 5

What is the purpose of the '..' notation in a file path?

Accepted Answer

Parent directory. .. refers to the parent directory of the current directory.

Answer

Current directory

Answer

Root directory

Answer

Home directory

Question 6

You want to delete a file but you are worried about accidentally deleting the wrong one. Which flag should you use with 'rm' for confirmation?

Accepted Answer

rm -i. The -i flag makes the rm command interactive, asking for confirmation before removing each file.

Answer

rm -f

Answer

rm -v

Answer

rm -R

Question 7

What does the 'cat' command do when provided with multiple filenames as arguments?

Accepted Answer

It displays the contents of all files sequentially. The cat command reads the files in the order they are listed and concatenates them to the standard output.

Answer

It displays only the first file

Answer

It compares them

Answer

It merges them into one file

Question 8

Which TWO of the following commands help you move within the directory structure?

Accepted Answer

cd. cd and popd allow moving between directories.

Answer

cat

Answer

ls

Answer

mv

Question 9

A user reports they cannot execute a script named 'deploy.sh' even though the file permissions are set to 644. What must you change to enable execution for the owner?

Accepted Answer

chmod 744 deploy.sh. Permission 644 (rw-r--r--) lacks the execute bit. Changing the mode to 744 (rwxr--r--) adds execution rights for the owner.

Answer

chmod 655 deploy.sh

Answer

chown u+x deploy.sh

Answer

chmod +w deploy.sh

Question 10

What is the primary purpose of the /etc/shadow file?

Accepted Answer

It stores encrypted password hashes.. /etc/shadow stores user password hashes and password aging information, keeping them separate from /etc/passwd for security.

Answer

It stores all user login shells.

Answer

It stores system-wide cron jobs.

Answer

It stores user group membership lists.

Question 11

You have a file 'notes.txt' and you want to ensure the group owner can read and write it, but nobody else can access it. Which chmod command works?

Accepted Answer

chmod 660 notes.txt. Owner: rwx (7) or rw (6), Group: rw (6), Others: none (0). 660 provides read/write for owner and group.

Answer

chmod 060 notes.txt

Answer

chmod 666 notes.txt

Answer

chmod 770 notes.txt

Question 12

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 standard package manager for modern RHEL-based distributions, succeeding YUM.

Answer

Pacman

Answer

Portage

Answer

APT

Question 13

You need to see the last 20 lines of a file named 'access.log'. Which command is the most appropriate?

Accepted Answer

tail -n 20 access.log. The tail command with the -n option allows specifying the number of lines to display from the end of the file.

Answer

cat -n 20 access.log

Answer

less -n 20 access.log

Answer

head -n 20 access.log

Question 14

A system administrator needs to identify the numerical ID (UID) of the user 'jdoe'. Which file should be checked?

Accepted Answer

/etc/passwd. The /etc/passwd file contains user account information, including the username, UID, GID, home directory, and shell.

Answer

/etc/shadow

Answer

/etc/profile

Answer

/etc/group

Question 15

To add a new user named 'guest' and set their home directory to '/home/guest', which command is correct?

Accepted Answer

useradd -m -d /home/guest guest. The 'useradd -m' flag creates the home directory, and the username is specified as the last argument.

Answer

usermod -d /home/guest guest

Answer

useradd -h /home/guest guest

Answer

addhome guest

Question 16

Which command would you use to change the expiration date of a user's password?

Accepted Answer

chage. The 'chage' command is used to modify password aging information and expiration dates for user accounts.

Answer

passwd -e

Answer

usermod -e

Answer

userdel -p

Question 17

Which THREE commands are related to viewing or changing group memberships?

Accepted Answer

groups. groups lists them, id shows them, and usermod -aG changes them.

Answer

chgrp

Answer

groupmod

Question 18

A developer is writing an application that performs heavy system-level calls. Why would they choose to use Linux for this development?

Accepted Answer

Because the source code is transparent, allowing for deep optimization and debugging.. Linux is open source, allowing developers to see exactly how system calls are handled by the kernel, which is vital for performance tuning.

Answer

Because it is the only operating system that supports multi-threading.

Answer

Because Linux has a graphical user interface that is mandatory for all applications.

Answer

Because Linux only runs on x86 hardware.

Question 19

A student wants to start contributing to Linux projects. Which activity is the most effective way to start?

Accepted Answer

Participating in documentation, bug reporting, or small code fixes in projects.. Reporting bugs, writing documentation, or fixing small issues in open source projects are ideal ways to start contributing.

Answer

Only reading the source code without providing feedback.

Answer

Starting a new proprietary distribution for profit.

Answer

Rewriting the entire Linux kernel from scratch.

Question 20

You are troubleshooting a network issue where a Linux server cannot reach an external website. The ping command to the gateway succeeds, but pinging the website IP fails. Which configuration file should you check to ensure the server can resolve domain names?

Accepted Answer

/etc/resolv.conf. The /etc/resolv.conf file contains DNS server addresses required for domain name resolution.

Answer

/etc/network/interfaces

Answer

/etc/sysconfig/network

Answer

/etc/hosts