201-450 Online Practice Questions and Answers

When is historical data of resource usage important? (Select THREE correct answers.)

A. Predicting when resources will need to be increased.

B. Selecting a computer vendor.

C. Identifying processes killed during out of memory occurrences.

D. Diagnosing capacity problems.

E. Troubleshooting a software problem.

What is the purpose of the command udevadm monitor?

A. It listens to kernel events produced by a udev rule and print information to the console.

B. It monitors the /dev directory for new devices.

C. It monitors the udev process and prints performance statistics to the console.

D. It communicates with D-Bus to setup new devices.

Which of the following command sequences can be used to extract files contained in a initramfs file (/boot/ initramfs) which is used by the kernel at boot time?

A. cp /boot/initramfs /tmp/initramfs.gz; gzip -c /tmp/initramfs.gz; mkdir /tmp/initramfs.dir ; cd /tmp/ initramfs.dir ; cpio -i < /tmp/initramfs

B. cp /boot/initramfs /tmp/initramfs.gz; gunzip /tmp/initramfs.gz; mkdir /tmp/initramfs.dir ; cd /tmp/ initramfs.dir ; cpio -i < /tmp/initramfs

C. cp /boot/initramfs /tmp/initramfs.gz; gunzip /tmp/initramfs.gz; mount /tmp/initramfs /mnt/ -o loop -t initramfs

D. cp /boot/initramfs /tmp/initramfs.gz; gunzip /tmp/initramfs.gz; mkdir /tmp/initramfs.dir ; cd /tmp/ initramfs.dir ; cpio -e /tmp/initramfs

E. cp /boot/initramfs /tmp/initramfs.gz; gunzip /tmp/initramfs.gz; mount /tmp/initramfs /mnt/ -o loop -t initrd

Which of the following best describes the format of the /etc/fstab file?

A. device name; filesystem type; mount point; mount options; dump filesystem; fsck order

B. device name; mount point; filesystem type; mount options; dump filesystem; fsck order

C. device name; mount point; mount options; filesystem type; dump filesystem; fsck order

D. mount point; filesystem type; device name; mount options; dump filesystem; fsck order

E. mount point; device name; filesystem type; mount options; dump filesystem; fsck order

Which of the following commands can be used to script interactions with various TCP or UDP services?

A. ftp

B. nc

C. tcpdump

D. strings

E. wget

What should be done to ensure a client machine uses the recursive nameserver running on the IP address 192.168.0.1? (Choose TWO correct answers.)

A. Add nameserver 192.168.0.1 to /etc/resolv.conf.

B. Run route add nameserver 192.168.0.1.

C. Run ifconfig eth0 nameserver 192.168.0.1.

D. Ensure that the dns service is listed in the hosts entry in the /etc/nsswitch.conf file.

E. Run bind add nameserver 192.168.0.1.

Which of the following wireless tools can be used to check the wireless network link quality? (Choose TWO correct answers.)

A. iwconfig

B. iwlink

C. iwscan

D. iwifi

E. iw

Which of the following commands restores only those files containing lpi in their name from the archive lpifiles.tar.gz?

A. tar xvzf lpifiles.tar.gz --wildcards `*lpi*'

B. tar xvzwf lpifiles.tar.gz `*lpi*'

C. tar -xvfz lpifiles.tar.gz --deep `*lpi*'

D. tar -xvzf lpifiles.tar.gz --subdirs `*lpi*'

E. tar xvzf lpifiles.tar.gz --globbing `*lpi*'

Which of the following init systems comes along with an own UEFI boot loader?

A. systemd

B. SysVinit

C. Upstart

D. OpenRC

E. launchd

Which of the following properties should be recorded in order to monitor the quality of a network link? (Choose two.)

A. Bandwidth in both directions

B. Number of nodes using the link

C. Effective Latency

D. Number of IPv4 and IPv6 packets

E. Number of used TCP ports