リアルSCA_SLES15試験PDFテストエンジン 練習テスト問題
SUSE SCA_SLES15リアル2023年最新のブレーン問題集で模擬試験問題集
質問 # 13
For programs to leverage PolKit they are split into two separate processes. Which statements below are true regarding these two PolKit processes? {Choose two)
- A. The Mechanism process runs in the User Session.
- B. The Policy Agent process runs in the System Context.
- C. The Policy Agent process runs in the User Session.
- D. The Authentication Agent runs in the System Context.
- E. The Mechanism process runs in the System Context.
- F. The D-Bus runs in the User Session.
正解：B、E
解説：
Explanation
For programs to leverage PolKit they are split into two separate processes. The statements below that are true regarding these two PolKit processes are:
The Mechanism process runs in the System Context.
The Policy Agent process runs in the User Session.
The Mechanism process is responsible for performing privileged actions on behalf of unprivileged users. It runs as root in the System Context and communicates with PolKit via D-Bus. The Policy Agent process is responsible for requesting authorization from users when they attempt to perform privileged actions. It runs as a normal user in the User Session and communicates with PolKit via D-Bus. References:
https://documentation.suse.com/sles/15-SP3/html/SLES-all/sec-polkit.html#sec-polkit-processes
質問 # 14
Which file contains the ntp configuration?
- A. etc/ntp.cfg
- B. /etc/sysconfig/ntp.conf
- C. /etc/ntp.conf
- D. /srv/ntp/ntp.conf
正解：A
質問 # 15
firewalld maintains two separate configurations. What are they named? (Choose two)
- A. Fixed
- B. Temporary
- C. Testing
- D. Permanent
- E. Production
- F. Runtime
- G. Static
正解：D、F
解説：
Firewalld uses two separated configuration sets, runtime, and permanent configuration.
The runtime configuration is the actual running configuration and it is not persistent on reboots. When the firewalld service starts it loads the permanent configuration which becomes the runtime configuration.
https://www.supportsages.com/everything-you-need-to-know-about-firewalld/#:~:text=Firewalld%20uses%20two%20separated%20configuration,which%20becomes%20the%20runtime%20configuration.
質問 # 16
Which command gives you a real-time view of the processes running on your system by giving you a continuously updated list?
- A. pstree
- B. procupdate
- C. showproc
- D. Is-la
- E. ps -x
- F. top
正解：F
解説：
Explanation
The command that gives you a real-time view of the processes running on your system by giving you a continuously updated list is top. The top command will display various information about system performance and resource usage, such as CPU load, memory usage, swap usage, etc., as well as a list of processes sorted by CPU utilization by default. You can use various keyboard commands to interact with top and change its behavior and output.
References:https://documentation.suse.com/sles/15-SP3/html/SLES-all/sec-cli-processes.html#sec-cli-processes-
質問 # 17
Assuming the default value for umask, which statements regarding permissions are true? (Choose two)
- A. The permissions on new directories would be set to 666.
- B. The permissions on new directories would be set to 770.
- C. The permissions on new files would be set to 444.
- D. The permissions on new directories would be set to 755.
- E. The permissions on new files would be set to 754.
- F. The permissions on new files would be set to 644.
正解：B、C
質問 # 18
You want to restrict access to your server via SSH to just a few specific users. What will you need to do to accomplish this?
- A. Modify the Authorized option in the /etc/ssh/sshd_config file.
- B. Modify the Permitted option is the Assh/sshd_configfile.
- C. Modify the Authorized option in the /var/ssh/config file.
- D. Modify the Permitted option in the ~/.ssh/sshd_config file
- E. Modify the AllowUsers option in the /etc/ssh/sshd_config file.
正解：E
質問 # 19
Which process ID is assigned to systemd?
- A. 0
- B. 1
- C. 2
- D. it is the only process with no system ID.
正解：C
解説：
Explanation
The program systemd is the process with process ID 1. It is responsible for initializing the system in the required way. systemd is started directly by the kernel and resists signal 9, which normally terminates processes. All other programs are either started directly by systemd or by one of its child processes.
https://documentation.suse.com/sles/15-GA/html/SLES-all/cha-systemd.html Systemd is the first process that is started by the kernel during boot. It has the process ID of 1. It is responsible for initializing and managing other processes and services on the system.
References:https://documentation.suse.com/sles/15-SP3/html/SLES-all/cha-systemd-basics.html#sec-systemd-in
質問 # 20
Which bash commands result in a valid arithmetic expansion? (Choose three)
- A. TOTAL=$[8/2]
- B. TOTAL=$[2.1*4]
- C. TOTAL=$((5+2))
- D. ((TOTAL++))
- E. TOTAL=$[8.4/2.1]
- F. TOTAL=$((5.3+2.2))
正解：A、C、D
解説：
Explanation
The bash commands that result in a valid arithmetic expansion are:
TOTAL=$[8/2]
TOTAL=$((5+2))
((TOTAL++))
Arithmetic expansion is a bash feature that allows you to perform integer calculations and assign or use the result in a command or expression. There are two syntaxes for arithmetic expansion:
[expression]and((expression)). The expression can contain variables, operators, parentheses, etc. The ((expression)) syntax can also be used without the $ sign for assignments or conditional tests. References:
https://documentation.suse.com/sles/15-SP3/html/SLES-all/cha-bash.html#sec-bash-arithmetic
質問 # 21
Assuming the default value for umask, which statements regarding permissions are true? (Choose two)
- A. The permissions on new directories would be set to 666.
- B. The permissions on new directories would be set to 770.
- C. The permissions on new files would be set to 444.
- D. The permissions on new directories would be set to 755.
- E. The permissions on new files would be set to 754.
- F. The permissions on new files would be set to 644.
正解：B、C
質問 # 22
By default, what does the VNC Client and the VNC server daemon use for secure communications?
- A. Both the VNC Client and the VNC server assume you have access to a valid 3rd party CA like Verisign.
- B. VNC is based on the Telnet protocol so encrypted communication between the VNC Client and Server is not possible.
- C. A self-signed SSL certificate
- D. The VNC server prompts the VNC Client for a password that was configured when the VNC server was installed.
- E. On SLE 15 the VNC Client assumes the server is set up as a CA.
正解：C
解説：
Explanation
By default, the VNC Client and the VNC server daemon use a self-signed SSL certificate for secure communications. The VNC server generates a self-signed certificate when it is started for the first time. The VNC Client will prompt the user to accept or reject the certificate when connecting to the server.
Alternatively, the user can provide a custom certificate for the VNC server or disable encryption if desired.
References:https://documentation.suse.com/sles/15-SP3/html/SLES-all/sec-vnc-security.html
質問 # 23
Which file contains the ntp configuration?
- A. etc/ntp.cfg
- B. /etc/sysconfig/ntp.conf
- C. /etc/ntp.conf
- D. /srv/ntp/ntp.conf
正解：A
質問 # 24
Which file contains information about secondary groups on the system?
- A. /etc/group
- B. etc/sysconflg/group
- C. /etc/second.grp
- D. /var/share/group
- E. /var/lib/group
正解：C
質問 # 25
In the scripts subdirectory under your home directory there is a file named tstparse.sh. You want to set an Extended ACL so thejsmith user has all permissions to just this file. Which command will accomplish this?
- A. setacl -a user:jsmith:rwx -/scripts/tstparse.sh
- B. setfacl -m u:jsmith:rwx -/scripts/tstparse.sh
- C. extacl -a user=jsmith:rwx -/scripts/tstparse.sh
- D. modacl user=jsmith:rwx -/scripts/tstparse.sh
正解：B
解説：
Explanation
The command that you would use to set an Extended ACL so that the jsmith user has all permissions to just the tstparse.sh file in your scripts subdirectory under your home directory is setfacl -m u:jsmith:rwx
~/scripts/tstparse.sh. This command will modify (or create if it does not exist) the Extended ACL for the specified file and add an entry for the jsmith user with read, write, and execute permissions. You can use getfacl ~/scripts/tstparse.sh to view the Extended ACL for the file.
References:https://documentation.suse.com/sles/15-SP3/html/SLES-all/sec-acl.html#sec-acl-set
質問 # 26
For programs to leverage PolKit they are split into two separate processes. Which statements below are true regarding these two PolKit processes? {Choose two)
- A. The Mechanism process runs in the User Session.
- B. The Policy Agent process runs in the User Session.
- C. The Authentication Agent runs in the System Context.
- D. The Policy Agent process runs in the System Context.
- E. The D-Bus runs in the User Session.
- F. The Mechanism process runs in the System Context.
正解：B、C
質問 # 27
Which commands could you use to determine the proper syntax for the cp command? (Choose three)
- A. info cp
- B. doc -cp
- C. info --cp help
- D. mancp cp
- E. help cp
- F. cp--help
- G. display cp
正解：C、F
質問 # 28
What is the command and options to remove repository number 4?
- A. yast repo-manag
- B. libzypp --remove-repo 4
- C. zypper rr 4
- D. yumrepo -del 4
- E. rpm -rr 4
正解：E
質問 # 29
What is the default port a VNC Client uses to connect?
- A. TCP 5901
- B. TCP 5801
- C. DP 5901
- D. DP 5801
正解：A
解説：
https://en.wikipedia.org/wiki/Virtual_Network_Computing#:~:text=VNC%20by%20default%20uses%20TCP,Java%2Denabled%20web%2Dbrowser.
VNC by default uses TCP port 5900+N,[6][7] where N is the display number (usually :0 for a physical display). Several implementations also start a basic HTTP server on port 5800+N to provide a VNC viewer as a Java applet, allowing easy connection through any Java-enabled web-browser. Different port assignments can be used as long as both client and server are configured accordingly. A HTML5 VNC client implementation for modern browsers (no plugins required) exists too.[8]
質問 # 30
Select the valid device types. (Choose two)
- A. udev
- B. Block
- C. Redirect
- D. Network
- E. Character
- F. null
- G. Pipe
正解：C、D
質問 # 31
Which commands could you use to determine the proper syntax for the cp command? (Choose three)
- A. info cp
- B. doc -cp
- C. info --cp help
- D. mancp cp
- E. help cp
- F. cp--help
- G. display cp
正解：C、F
質問 # 32
You want ensure an ext3 filesystem is checked every 50 times it is mounted. Which command would you use?
- A. mkfs
- B. fdisk -o
- C. dumpe2fs
- D. tune2fs
正解：A
質問 # 33
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