認証トレーニング201-450試験問題集テストエンジン [2023]
2023年02月26日ガイド準備で201-450試験合格
質問 54
After the downloading patch-4.6.4.xz from http://kernel.org, what are the next steps to prepare the build of a version 4.6.4 Linux kernel? (Choose two.)
- A. Uncompress the file using xzto get the uncompressed patch file
- B. Apply the patch file to the kernel source directory containing kernel version 4.6.3
- C. Apply the patch file to the kernel source directory containing kernel version 4.6.0
- D. Use patchto apply the uncompressed patch file to the source directory of any previous kernel version
- E. Uncompress the file and move the resulting directory to /usr/src/linux
正解: A,D
質問 55
Which command can be used to scan a specified network looking for IP addresses that appear to be in use?
- A. netscan
- B. ip
- C. nmap
- D. tcpdump
- E. hostdiscover
正解: C
質問 56
A system with SysV-init has a service installed called apache2. Which file controls the start and stop of this service and is referenced by the various runlevel directories?
- A. /etc/rc2.d/70apache2
- B. /etc/rc2.d/apache2.start
- C. /etc/init.d/apache2
- D. /etc/rc2.d/apache2
正解: C
質問 57
Why is the root file system mounted read-only during boot and remounted with write permission later on?
- A. To avoid writing to the disk, unless the root password is known.
- B. To avoid other operating systems overwriting the Linux root partition.
- C. Because if problems with the root file system are detected during the boot, fsck can be run, without risk of damage.
- D. Because the disk has its own write protection that cannot be changed by the operating system.
- E. Because this way crackers cannot collect information about root with boot sniffers.
正解: C
質問 58
What is the purpose of an initramfs during the Linux system start?
- A. It moves the kernel from normal system memory to initram memory to speed up kernel access
- B. It copies the root file system's content to RAM to speed up the system and reduce writes to disk
- C. It loads required modules and starts sub sytems like LVM to make the root file system accessible to the kernel
- D. It creates a ram disk to store volatile data for directories like /tmpto reduce writes to disk
正解: C
質問 59
What information is found in the following excerpt from the file /proc/mdstat? (Choose two.)
- A. The information [UU_] means, that the raid is missing one disk and is not fully redundant
- B. The information [3/2] means that 3 RAID disks belong to the array and 2 disks are spare.
Together they equal the number of available disks - C. The device is using version 1.2 metadata to allow LILO and GRUB Legacy to use
/dev/md0 as the boot partition. This would not have been necessary with GRUB2 - D. One of the disks in /dev/md0 has failed and a spare disk is used to recreate full redundancy
- E. The spare disk /dev/sda1 is used to restore full redundancy after the current recovery
正解: A,D
質問 60
CORRECT TEXT
Which file contains the text message that is displayed after logging into the console?
(Specify the full name of the file, including path.)
正解:
解説:
/etc/motd
質問 61
What should be done to ensure a client machine uses the recursive nameserver running on the IP address
192.168.0.1? (Choose two.)
- A. Ensure that the dnsservice is listed in the hosts entry in the /etc/nsswitch.conffile
- B. Add nameserver 192.168.0.1to /etc/resolv.conf
- C. Run routeadd nameserver 192.168.0.1
- D. Run ifconfig eth0 nameserver 192.168.0.1
- E. Run bindadd nameserver 192.168.0.1
正解: A,B
質問 62
What are the options to node.startup in the iscsid.conf file? (Choose TWO correct answers.)
- A. login
- B. discover
- C. manual
- D. automatic
- E. initiate
正解: C,D
質問 63
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. ipadm
- B. iwlist
- C. arp
- D. ifconfig
正解: C
質問 64
CORRECT TEXT
Running tcpdump -nli eth1 'tcp' shows the following output:
14:41:53.694538 IP 10.1.52.145.51738 > 24.215.7.162.143: Flags [.], ack 33051, win 1002, options [nop,nop,TS val 36789130 ecr 1746004159], length 0 What is the source IP address of this packet? (Please specify the answer in digits and dots ONLY.)
正解:
解説:
10.1.52.145
質問 65
If the file containing the Linux kernel is deleted, what happens when the system boots?
- A. Instead of the kernel, the initramfs is loaded and instructed to mount the root filesystem and reinstall the kernel from the original package or from source
- B. The bootloader mounts the root filesystem read-only and launches /bin/sh directly in order to allow the administrator to reinstall the kernel
- C. Without a kernel system cannot boot and, depending on the bootloader, an error is displayed
- D. The system starts normally since the bootloader copies the kernel to the master boot record of the hard disk
正解: C
質問 66
Fill in the blank.
Which program lists information about files and network connections opened by processes? (Specify ONLY the command without any path or parameters.)
正解:
解説:
lsof
質問 67
A Linux server running systemd booted to rescue.targetfor maintenance. Which commands are used to restore the server to its usual target? (Choose two.)
- A. systemctl default
- B. telinit 0
- C. sync
- D. systemctl reboot
- E. systemctl emergency
正解: A,B
質問 68
The following command has just been run successfully:
Cd /opt; tar xvf /dev/nst0;
What will happen if the command sequence is run again?
- A. An error saying that there is no tape present is generated because the tape has been ejected after being used
- B. The entire contents of /opt will be replaced with the contents of the next file on the tape
- C. The contents of /optwill have additional content added from the next file on the tape
- D. The contents of /opt will be restored again
正解: C
質問 69
Which RAID level value must be used with Linux software RAID in order to create an array of mirrored devices?
- A. 0
- B. 1
- C. mirrorstripe
- D. container
- E. 2
正解: A
質問 70
CORRECT TEXT
Which command is used to create a ISO9660 filesystem? (Specify ONLY the command without any path or parameters.)
正解:
解説:
mkisofs, genisoimage
質問 71
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 is the holds the SSL key to allow authentication to the remote file server.
- D. It has configuration information on settings for the /home mount point.
正解: A
質問 72
Which commands are used to load modules into the Linux kernel? (Choose TWO correct answers.)
- A. kernload
- B. modprobe
- C. probemod
- D. insmod
- E. loadmod
正解: B,D
質問 73
What option in the collectd configuration file is required in order to define what to start monitoring?
- A. Plugin
- B. LoadModule
- C. Module
- D. LoadPlugin
正解: D
質問 74
Which of the following best describes the format of the /etc/fstab file?
- A. device name; mount point; mount options; filesystem type; dump filesystem; fsck order
- B. mount point; device name; filesystem type; mount options; dump filesystem; fsck order
- C. device name; filesystem type; mount point; mount options; dump filesystem; fsck order
- D. mount point; filesystem type; device name; mount options; dump filesystem; fsck order
- E. device name; mount point; filesystem type; mount options; dump filesystem; fsck order
正解: E
質問 75
Which command is used to install a new LILO boot loader?
- A. lilo
- B. lilo-config
- C. lilo-install
- D. install-lilo
正解: A
質問 76
CORRECT TEXT
According to the Filesystem Hierarchy Standard (FHS), what is the path to the Linux kernel source and may be a symbolic link to the real Linux source code? (Please specify the full path with no version information.)
正解:
解説:
/usr/src/linux, /usr/src/linux/
質問 77
Which of the following filter keywords for tcpdump specify the transfer direction for network packets? (Choose TWO correct answers.)
- A. source
- B. dest
- C. both
- D. src or dst
- E. src
正解: D,E
質問 78
The correct command sequence to create and mount logical volumes on a Linux system is:
- A. pvcreate, lvcreate, vgcreate, mkfs, mount
- B. pvcreate, vgcreate, lvcreate, mkfs, mount
- C. vgcreate, lvcreate, pvcreate, mount, mkfs
- D. mkfs, pvcreate, vgcreate, lvcreate, mount
- E. lvcreate, pvcreate, vgcreate, mkfs, mount
正解: B
質問 79
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