LPIC-1 Timed Practice Test 5 — 10 Questions

Question 1

An administrator needs to find all files in the /var/log directory that have been modified in the last 24 hours. Which command should be used?

Accepted Answer

find /var/log -mtime 0. Option B is correct because the `find` command with `-mtime 0` searches for files whose data modification time is within the last 24 hours. The `-mtime` option uses a 24-hour period, and a value of 0 means modified less than 24 hours ago, which matches the requirement to find files modified in the last 24 hours in /var/log.

Answer

find /var/log -ctime 0

Answer

find /var/log -atime 0

Answer

find /var/log -mmin 1440

Question 2

Refer to the exhibit. The system has two network interfaces: eth0 and eth1. Which interface will be used to reach a host at IP address 10.10.10.10?

Accepted Answer

eth1 via gateway 10.0.0.1.. The routing table determines that the destination IP 10.10.10.10 is not within any directly connected subnet (eth0: 192.168.1.0/24, eth1: 10.0.0.0/24). The most specific matching route is the static route to 10.0.0.0/8 via gateway 10.0.0.1 on eth1, which covers the 10.10.10.10 address. Therefore, eth1 is used to reach the host.

Answer

eth0 via gateway 192.168.1.1.

Answer

eth0 via the default gateway.

Answer

eth0 directly.

Question 3

An administrator is troubleshooting a DNS issue. The command 'dig @8.8.8.8 example.com' returns a response, but 'host example.com' returns 'Host not found'. Which of the following is the most likely cause?

Accepted Answer

The /etc/resolv.conf file is misconfigured.. The command 'dig @8.8.8.8 example.com' succeeds, proving that the DNS server at 8.8.8.8 is reachable and functional, and that network connectivity is fine. However, 'host example.com' fails because it uses the system's default resolver, which reads /etc/resolv.conf to determine which DNS server to query. If /etc/resolv.conf is misconfigured (e.g., missing or incorrect nameserver entries), the resolver cannot reach a valid DNS server, resulting in 'Host not found'.

Answer

The network interface is down.

Answer

The /etc/hosts file is corrupt.

Answer

The DNS server at 8.8.8.8 is not responding.

Question 4

Refer to the exhibit. A Linux system fails to boot with a kernel panic. The dmesg output shows the disk is detected and partitions are recognized. Which of the following is the most likely cause of the kernel panic?

Accepted Answer

The root filesystem cannot be mounted because the root= kernel parameter points to a non-existent or incorrect device.. A is correct because the kernel panic occurs after the disk and partitions are detected, indicating the kernel can see the hardware but cannot mount the root filesystem. The most common cause is an incorrect or missing `root=` kernel parameter in the bootloader configuration (e.g., GRUB), which specifies the root device (e.g., `/dev/sda1` or `UUID=...`). If this parameter points to a non-existent or wrong partition, the kernel cannot pivot to the root filesystem, leading to a panic.

Answer

The kernel module for the SATA controller is missing from the initramfs.

Answer

The SATA controller is not supported by the kernel.

Answer

The disk has bad sectors causing read errors during boot.

Question 5

A system administrator needs to ensure that a bash script continues executing even if any command in the script fails. Which of the following should be used at the beginning of the script?

Accepted Answer

set +e. Option A is correct because `set +e` disables the 'exit on error' behavior in a bash script, allowing the script to continue executing even if a command returns a non-zero exit status. By default, bash scripts do not exit on error, but if `set -e` is used elsewhere, `set +e` explicitly turns that off to ensure the script continues despite failures.

Answer

trap 'echo error' ERR

Answer

unset -e

Answer

set -e

Answer

# set +e

Question 6

A user reports that running '/usr/local/bin/myapp' from the command line results in 'bash: /usr/local/bin/myapp: No such file or directory'. The exhibit shows the file exists and is a valid executable. What is the most likely cause of the error?

Accepted Answer

The dynamic linker /lib64/ld-linux-x86-64.so.2 is missing or corrupted.. When a dynamically linked executable exists and is valid but fails with 'No such file or directory', the most common cause is that the dynamic linker (e.g., /lib64/ld-linux-x86-64.so.2) is missing or corrupted. Bash reports this error because the kernel's execve() syscall cannot find the interpreter specified in the ELF's PT_INTERP segment, not because the executable itself is absent. This is a classic symptom distinct from a missing library, which would produce 'error while loading shared libraries'.

Answer

The script interpreter specified in the shebang is missing.

Answer

The library libc.so.6 is missing.

Answer

The file does not have execute permission for the user.

Question 7

Refer to the exhibit. An administrator needs to edit /etc/example.conf to change setting1 to 'production' and add a new line 'setting2=value' after the include line. The file must be edited in place without creating a backup. Which command sequence achieves this?

Accepted Answer

sed -i 's/setting1=default/setting1=production/' /etc/example.conf; sed -i '/^include /a
setting2=value' /etc/example.conf. Option A is correct because the first sed command uses the -i flag to edit the file in place without a backup, and the substitution 's/setting1=default/setting1=production/' changes the existing setting. The second sed command uses the 'a' (append) command after the line matching '^include ' to add the new line 'setting2=value' after it, also with -i to avoid creating a backup.

Answer

sed -i 's/setting1=default/setting1=production/' /etc/example.conf; sed -i '/^include /i
setting2=value' /etc/example.conf

Answer

sed -i.bak 's/setting1=default/setting1=production/' /etc/example.conf; sed -i.bak '/^include /a
setting2=value' /etc/example.conf

Answer

sed -i.bak 's/setting1=default/setting1=production/' /etc/example.conf; sed -i.bak '/^include /a
setting2=value' /etc/example.conf

Question 8

Which TWO commands can be used to display the current runlevel of a SysV init system?

Accepted Answer

who -r. The `who -r` command displays the current runlevel and the time it was last changed, making it a valid way to check the runlevel in a SysV init system. The `runlevel` command directly outputs the previous and current runlevel, which is the standard tool for this purpose.

Answer

init 3

Answer

telinit

Answer

systemctl get-default

Question 9

Which THREE of the following are valid files or directories used by the Domain Name System (DNS) resolution process on a Linux system?

Accepted Answer

/etc/host.conf. Option A is correct because `/etc/host.conf` controls the order in which hostname resolution methods are tried (e.g., 'order hosts,bind'), directly influencing whether the system queries DNS or checks local files first. This file is part of the glibc resolver's configuration and is consulted during the DNS resolution process on Linux.

Answer

/etc/named.conf

Answer

/etc/sysconfig/network

Question 10

An administrator reviews the above DHCP server logs. Based on the output, which statement is correct about the DHCP transaction?

Accepted Answer

The client successfully obtained the IP address 192.168.1.100.. The DHCP server logs show a successful four-way handshake: DHCPDISCOVER, DHCPOFFER, DHCPREQUEST, and DHCPACK. The final DHCPACK from the server confirms that the client has been granted the IP address 192.168.1.100, making option C correct.

Answer

The client sent a DHCPINFORM to renew its existing lease.

Answer

The DHCP server is configured to assign IP addresses from a pool that includes 192.168.1.100.

Answer

The DHCP server rejected the client's request because the DHCPREQUEST was not broadcast.