201-450 Online Practice Questions and Answers

Which command will report information on memory usage, paging and block input/output?

A. free

B. memshow

C. ps

D. top

E. vmstat

In the following output from top, which processes contribute to the percentage of time that the CPU spends in the state of wa?

Tasks: 193 total, 1 running, 190 sleeping, 2 stopped, 0 zombie

Cpu(s): 0.5%us, 0.3%sy, 0.0%ni, 98.2%id, 1.0%wa, 0.0%hi, 0.0%si, 0.0%st

A. Processes waiting for user interaction.

B. Processes that were already closed and are waiting to be launched again.

C. Processes that have not been scheduled yet because they haven't been fully loaded into RAM or are in swap.

D. Processes waiting for IO operations to complete.

On a server running the 3.4.50-11 Linux kernel, which file in the /boot directory contains the kernel configuration parameters?

A. config-linux-3.4.50-11

B. config-3.4.50-11

C. system-3.4.50-11

D. vmlinuz-3.4.50-11

E. rc.config-3.4.50-11

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

What mount option must be used in /etc/fstab when mounting an iSCSI target?

A. _santarget

B. iscsi

C. waitiscsi

D. _netdev

The main configuration file for autofs has this entry:

/home /etc/auto.home

What is the meaning of the /etc/auto.home file?

A. It has the indirect maps for the mounting of file systems.

B. It has configuration information, such as passwords and keys, for the remote file server.

C. It has configuration information on settings for the /home mount point.

D. It is the holds the SSL key to allow authentication to the remote file server.

Which of the following commands lists IPv4 addresses and MAC addresses of network nodes that the local system has seen on its directly connected IP networks?

A. arp

B. ifconfig

C. ipadm

D. iwlist

In order to gather performance data with sar over a longer period of time, which command should be run periodically from cron?

A. sa1

B. sarmon

C. sarec

D. sadf

E. sarcron

What is the purpose of an initramfs during the Linux system start?

A. It loads required modules and starts sub sytems like LVM to make the root file system accessible to the kernel

B. It moves the kernel from normal system memory to initram memory to speed up kernel access

C. It copies the root file system's content to RAM to speed up the system and reduce writes to disk

D. It creates a ram disk to store volatile data for directories like /tmp to reduce writes to disk

Which command is used to install a GRUB boot loader into the master boot record?

A. grub-install

B. grub-mkconfig

C. grub-install-mbr

D. grub-glue-mbr

E. grub-mbr-setup