Certification Training for 102-500 Exam Dumps Test Engine [2021]
Oct 06, 2021 Step by Step Guide to Prepare for 102-500 Exam
NEW QUESTION 49
What is true about the Hop Limit field in the IPv6 header?
- A. Each router forwarding the packet increases the field's value.
- B. The field is transmitted within a hop-by-hop extension header.
- C. The field is not changed during the transport of a package.
- D. For multicast packages, the field's value is always 1.
- E. Each router forwarding the packet decreases the field's value.
Answer: E
NEW QUESTION 50
Which of the commands below might have produced the following output?
- A. dig -t mx www.example.org
- B. dig www.example.org
- C. dig -t ns www.example.org
- D. dig -t soa www.example.org
- E. dig -t a www.example.org
Answer: B
NEW QUESTION 51
Which of the following is true about IPv6?
- A. With IPv6, the TCP port numbers of most services have changed.
- B. For IPv6, UDP and TCP have been replaced by the Rapid Transmission Protocol RTP.
- C. IPv6 no longer supports multicast addresses.
- D. IPv6 no longer supports broadcast addresses.
- E. IPv4 addresses can be used without any change with IPv6.
Answer: D
NEW QUESTION 52
FILL BLANK
The presence of what file will temporarily prevent all users except root from logging into a system? (Specify the full name of the file, including path.)
Answer:
Explanation:
/sbin/nologin
NEW QUESTION 53
The correct crontab entry to execute the script chklog three times per month between 3 p.m. and 5 p.m.:
- A. 3 3,4,5 1 * * chklog
- B. * 15,16,17 1 * * chklog
- C. 0 15,16,17 1 * * chklog
- D. * 3,4,5 1 * * chklog
- E. 3 15,16,17 * * * chklog
Answer: C
NEW QUESTION 54
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. zoneinfo
- D. dnslookup
- E. dig
Answer: E
NEW QUESTION 55
What is true regarding the command sendmail?
- A. With any MTA, the sendmail command must be run periodically by the cron daemon.
- B. The sendmail command prints the MTAs queue history of which mails have been sent successfully.
- C. It is only available when the sendmail MTA is installed.
- D. All MTAs, including Postfix and Exim, provide a sendmail command.
Answer: D
NEW QUESTION 56
Which of the following are requirements in order to run a shell script like a regular command from anywhere in the filesystem? (Choose THREE correct answers.)
- A. The script file must be found in the $PATH.
- B. The file system on which the script resides must be mounted with the option scripts.
- C. The script must begin with a shebang-line (#!) that points to the correct interpreter.
- D. The script file must have the executable permission bit set.
- E. The user issuing the command must be in the group script.
Answer: A,C,D
NEW QUESTION 57
Which of the following statements is valid in the file /etc/nsswitch.conf?
- A. multi on
- B. namespaces: net mount procs
- C. hosts: files dns
- D. include /etc/nsswitch.d/
- E. 192.168.168.4 dns-server
Answer: C
NEW QUESTION 58
Which of the following are syslog facilities? (Choose two.)
- A. local5
- B. mail
- C. remote
- D. accounting
- E. postmaster
Answer: A,B
NEW QUESTION 59
Which of the following is a valid IPv6 address?
- A. 2001:db8:0g21::1
- B. 2001::db8:4581::1
- C. 2001:db8:3241::1
- D. 2001.db8.819f..1
- E. 2001%db8%9990%%1
Answer: C
NEW QUESTION 60
What is the conventional purpose of Linux UIDs that are lower than 100?
- A. They are reserved for super user accounts.
- B. They are reserved for the system admin accounts.
- C. They are reserved for system accounts.
- D. They are unused, aside from 0, because they are targets of exploits.
- E. They are used to match with GIDs in grouping users.
Answer: C
NEW QUESTION 61
What output is produced by the following command sequence?
echo '1 2 3 4 5 6' | while read a b c; do
echo result $c $b $a;
done
- A. result: 6 5 4 3 2 1
- B. result: 1 2 3 4 5 6
- C. result: 6 5 4
- D. result: 3 4 5 6 2 1
- E. result: 3 2 1
Answer: D
NEW QUESTION 62
Why is the correct configuration of a system's time zone important?
- A. Because NTP chooses servers nearby based on the configured time zone.
- B. Because the conversion of Unix timestamps to local time relies on the time zone configuration.
- C. Because the timezone is included in checksum calculations and timezone changes invalidate existing checksums.
- D. Because the environment variables LANG and LC_MESSAGES are, by default, set according to the time zone.
- E. Because the time zone is saved as part of the modification times of files and cannot be changed after a file is created.
Answer: B
NEW QUESTION 63
Which of the following commands preloads and manages existing SSH keys that are used for automatic authentication while logging in to order machines using SSH?
- A. ssh-agent
- B. ssh-keygen
- C. ssh-pki
- D. ssh-keyring
- E. sshd
Answer: B
NEW QUESTION 64
Which of the following entries in /etc/syslog.conf writes all mail related events to the file /var/log/maillog and sends all critical events to the remote server logger.example.com?
- A. mail/var/log/[email protected]
- B. mail.*/var/log/maillogmail.critsyslog://logger.example.org
- C. mail */var/log/maillogmail [email protected]
- D. mail.*/var/log/[email protected]
- E. mail.*/var/log/maillogmail,[email protected]
Answer: D
NEW QUESTION 65
FILL BLANK
Which command is used to sync the hardware clock to the system clock? (Specify only the command without any path or parameters.)
Answer:
Explanation:
hwclock
NEW QUESTION 66
Which of the following statements is true regarding systemd timer units?
- A. Each systemd timer unit controls a specific systemd service unit.
- B. Timer units can only be defined within a service unit's file.
- C. A dedicated system service, systemd-cron, handles the execution of timer units.
- D. Timer units only exist in the system scope and are not available for users.
- E. The command executed by the timer is specified in the timer unit's [Cmd] section.
Answer: A
NEW QUESTION 67
Which of the following configuration files should be modified to globally set shell variables for all users?
- A. /etc/profile
- B. /etc/bashrc
- C. ~/.bash_profile
- D. /etc/shellenv
- E. /etc/.bashrc
Answer: A
NEW QUESTION 68
For accessibility assistance, which of the following programs is an on-screen keyboard?
- A. GOK
- B. xkb
- C. xOSK
- D. atkb
Answer: A
NEW QUESTION 69
Which file inside the CUPS configuration directory contains the settings of the printers?
- A. printers.conf
- B. printcap.conf
- C. cupsd.conf
- D. snmp.conf
- E. cups-devices.conf
Answer: A
NEW QUESTION 70
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