2022 Best 102-500 Exam Preparation Material with New Dumps Questions
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NEW QUESTION 47
What command displays all aliases defined in the current shell? (Specify the command without any path information)
Answer:
Explanation:
alias, alias -p
NEW QUESTION 48
Which of the following is observed and corrected by a NTP client?
- A. Adjustments needed to support Daylight Saving Time.
- B. The skew in time between the system clock and the hardware clock.
- C. Changes in the time zone of the current computer's location.
- D. The skew in time between the system clock and the reference clock.
Answer: D
NEW QUESTION 49
Which of the following is true regarding the command sendmail?
- A. The sendmail command prints the MTA's queue history of which mails have been sent successfully.
- B. All common MTAs, including Postfix and Exim, provide a sendmail command.
- C. It is only available when the sendmail MTA is installed.
- D. With any MTA, the sendmail command must be run periodically by the cron daemon.
- E. When using systemd, sendmail is an alias to relayctl.
Answer: B
NEW QUESTION 50
Which of the following may occur as a consequence of using the command ifconfig? (Choose THREE correct answers.)
- A. The system's host name may change.
- B. New name servers may be added to the resolver configuration.
- C. The routing table may change.
- D. IP addresses may change.
- E. Network interfaces may become active or inactive.
Answer: C,D,E
NEW QUESTION 51
When the command echo $ outputs 1, which of the following statements is true?
- A. It is the process ID of the echo command.
- B. It is the exit value of the echo command.
- C. It is the process ID of the current shell.
- D. It is the exit value of the command executed immediately before echo.
Answer: D
NEW QUESTION 52
What is true regarding the file ~/.forward?
- A. After editing ~/.forward the user must run newaliases to make the mail server aware of the changes.
- B. Using ~/.forward, root may configure any email address whereas all other users may configure only their own addresses.
- C. When configured correctly, ~/.forward can be used to forward each incoming mail to more than one other recipient.
- D. As it is owned by the MTA and not writable by the user, it must be edited using the editaliases command.
Answer: C
NEW QUESTION 53
What is the conventional purpose of Linux UIDs that are lower than 100?
- A. They are unused, aside from 0, because they are targets of exploits.
- B. They are reserved for system accounts.
- C. They are used to match with GIDs in grouping users.
- D. They are reserved for the system admin accounts.
- E. They are reserved for super user accounts.
Answer: B
NEW QUESTION 54
Which of the following is the best way to list all defined shell variables?
- A. env
- B. set
- C. echo $ENV
- D. env -a
Answer: B
NEW QUESTION 55
Which of the following commands will delete the default gateway from the system's IP routing table? (Choose two.)
- A. netstat -r default
- B. sysctl ipv4.default_gw=0
- C. ip route del default
- D. ifconfig unset default
- E. route del default
Answer: C,E
NEW QUESTION 56
What is the purpose of TCP wrapper?
- A. Bind a network service to a TCP port.
- B. Encapsulate TCP messages in IP packets.
- C. Add SSL support to plain text TCP services.
- D. Limit access to a network service.
- E. Manage and adjust bandwidth used by TCP services.
Answer: D
NEW QUESTION 57
Which command, available with all MTAs, is used to list the contents of the MTA's mail queue? (Specify ONLY the command without any path or parameters.)
Answer:
Explanation:
mailq, /usr/bin/mailq, sendmail -bp, /usr/sbin/sendmail -bp, /usr/lib/sendmail -bp, sendmail,
/usr/sbin/sendmail, /usr/lib/sendmail
NEW QUESTION 58
Which of the following files assigns a user to its primary group?
- A. /etc/passwd
- B. /etc/shadow
- C. /etc/gshadow
- D. /etc/group
- E. /etc/pgroup
Answer: A
NEW QUESTION 59
With IPv6, how many bits have been used for the interface identifier of an unicast address? (Specify the number using digits only.)
Answer:
Explanation:
64
NEW QUESTION 60
Which of the following files is not read directly by a Bash login shell?
- A. ~/.bash_profile
- B. ~/.bash_login
- C. /etc/profile
- D. ~/.profile
- E. ~/.bashrc
Answer: E
NEW QUESTION 61
Which of the following commands can be used to limit the amount of memory a user may use?
- A. umask
- B. chage
- C. ulimit
- D. usermod
- E. passwd
Answer: C
Explanation:
Explanation/Reference:
NEW QUESTION 62
Of the ways listed, which is the best method to temporarily suspend a user's ability to interactively login?
- A. Add the command exit to the user's .login file.
- B. Change the user's password.
- C. Use passwd -d username to give the user an empty password.
- D. Use chage to expire the user account.
Answer: D
NEW QUESTION 63
What is a purpose of an SSH host key?
- A. It is used by system services like cron, syslog or a backup job to automatically connect to remote hosts.
- B. It must be sent by any SSH client in addition to a user key in order to identify the client's host.
- C. It provides the server's identity information to connecting SSH clients.
- D. It is root key by which all user SSH keys must be signed.
- E. It authenticates any user that logs into a remote machine from the key's host.
Answer: C
NEW QUESTION 64
Which file, if present, must contain all users that are allowed to use the cron scheduling system? (Specify the full name of the file, including path.)
Answer:
Explanation:
crontab
NEW QUESTION 65
Which if the following tools, used for DNS debugging, reports not only the response from the name sever but also details about the query?
- A. hostname
- B. dnsq
- C. dnslookup
- D. zoneinfo
- E. dig
Answer: E
NEW QUESTION 66
Which of the following protocols is designed to access the video card output of a virtual machine?
- A. X11
- B. XDMCP
- C. SPICE
- D. Xfce
- E. KDE
Answer: C
Explanation:
Explanation/Reference:
NEW QUESTION 67
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