最新なLpi 102-500問題集（236題）、真実試験の問題を全部にカバー！

質問 1：
Which mechanism does ggfe use to interact with the SSH agent?
A. Connecting to pod 2222 which is used by the system-wide SSH agent.
B. Creating an alias replacing anh with calls to ssh-agent.
C. Starting ssh-agent as a child process for each sir. invocation.
D. Evaluating environment variables such as SSH_AUTH_SOCK.
E. Using the fixed socket .BBh-ngant/ipe.
正解：D

質問 2：
Which of the following connection types, as seen in unroll connection show, may exist in Network Manager? (Choose THREE correct answers.)
A. bridge
B. tcp
C. ipv6
D. wifi
E. Ethernet
正解：A,D,E
解説: (Pass4Test メンバーにのみ表示されます)

質問 3：
What word is missing from the following SQL statement?
__________ count(*) from tablename;
(Please specify the missing word using lower-case letters only.)
正解：
select
Explanation:
The missing word is select, which is the keyword used to query data from a table in SQL. The select statement has the following syntax:
select column_list from table_name where condition;
The column_list can be one or more columns separated by commas, or an asterisk () to indicate all columns. The table_name is the name of the table that contains the data. The where clause is optional and specifies a condition to filter the rows. The count() function is an aggregate function that returns the number of rows in the table or in a group. Therefore, the complete statement is:
select count(*) from tablename;
This statement will return the number of rows in the table named tablename. Reference: SQL COUNT() Function - W3Schools, SQL COUNT: The Ultimate Guide To SQL COUNT Function - SQL Tutorial, The SQL Count Function Explained With 7 Examples.

質問 4：
How is the file format of /etc/crontab different from a normal crontab file? (Select TWO correct answers)
A. The /etc/crontab file can specify a year field.
B. The /etc/crontab file has a user field for commands.
C. A normal crontab file must be installed with the crontab command.
D. A normal crontab file allows for environment variable substitution.
正解：B,C
解説: (Pass4Test メンバーにのみ表示されます)

質問 5：
What is the lowest numbered unprivileged TCP port? (Specify the number in digits only.)
正解：
1024
Explanation:
The lowest numbered unprivileged TCP port is 1024. A port number is a 16-bit unsigned integer, thus ranging from 0 to 65535. The port numbers in the range from 0 to 1023 are the well-known ports or system ports. They are used by system processes that provide widely used types of network services. On Unix-like operating systems, a process must execute with superuser privileges to be able to bind a network socket to an IP address using one of the well-known ports. Therefore, the lowest numbered port that can be used by a normal user without root access is 1024, which is the first unprivileged port123 Reference:
1: How to bind to port number less than 1024 with non root access?
2: lowest numbered unprivileged TCP port - Bing
3: List of TCP and UDP port numbers - Wikipedia
4: Privileged Ports - World Wide Web Consortium (W3C)
5: What is the lowest TCP port number? - TeachersCollegesj

質問 6：
Which of the following are tasks handled by a display manager like XDM or KDM? (Choose TWO correct answers.)
A. Lock the screen when the user was inactive for a configurable amount of time.
B. Create an X11 configuration file for the current graphic devices and monitors.
C. Configure additional devices like new monitors or projectors when they are attached.
D. Start and prepare the desktop environment for the user.
E. Handle the login of a user.
正解：D,E
解説: (Pass4Test メンバーにのみ表示されます)

質問 7：
Which of the following commands lists all queued print jobs?
A. lpq
B. lpr
C. lpd
D. lp
E. lsq
正解：A
解説: (Pass4Test メンバーにのみ表示されます)

質問 8：
Which command included in NetworkManager is a curses application which provides easy acces to the NetworkManager on the command line? (Specify only the command without any path or parameters.)
正解：
nmtui
Explanation:
The command nmtui is a curses application that provides easy access to the NetworkManager on the command line. It is included in the networkmanager package, along with nmcli, which is another command line interface for NetworkManager. nmtui allows the user to view, edit, activate and deactivate network connections, as well as set the system hostname. It has a simple and user-friendly interface that can be navigated with the keyboard or mouse12. Reference: 1: Wireless Network Manager command line ncurses GUI. 2: NetworkManager - ArchWiki.