[Dec 05, 2021] Get to the Top with 102-500 Practice Exam Questions
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NEW QUESTION 54
What output does the command seq 1 5 20produce?
1
- A. 5
10
15
1 - B. 3
4
5
5 - C. 10
15
20 - D. 2
3
4
2 - E. 6
11
16
1
Answer: E
NEW QUESTION 55
The presence of what file will temporarily prevent all users except root from logging into the system? (Specify the full name of the file, including path.)
Answer:
Explanation:
/etc/nologin
NEW QUESTION 56
In which file, if present, must all users be listed that are allowed to use the cron scheduling system? (Specify the full name of the file, including path.)
Answer:
Explanation:
/etc/cron.allow
NEW QUESTION 57
Which of the following words is used to restrict the records that are returned from a SELECT SQL query based on a supplied criteria for the values in the records?
- A. WHERE
- B. CASE
- C. IF
- D. FROM
Answer: A
NEW QUESTION 58
What is true about NetworkManager on a Linux system that uses its distribution's mechanisms to configure network interfaces? (Choose two.)
- A. NetworkManager reconfigures all network interfaces to use DHCP unless they are specifically managed by NetworkManager.
- B. NetworkManager disables all interfaces which were not configured by NetworkManager.
- C. NetworkManager by default does not change interfaces which are already configured.
- D. NetworkManager must be explicitly enabled for each interface it should manage.
- E. NetworkManager can be configured to use the distribution's network interface configuration.
Answer: C,D
NEW QUESTION 59
If an alias ls exists, which of the following commands updates the alias to point to the command ls -l instead of the alias's current target?
- A. alias --force ls='ls -l'
- B. realias ls='ls -l'
- C. alias --update ls ls='ls -l'
- D. set ls='ls -l'
- E. alias ls='ls -l'
Answer: E
NEW QUESTION 60
FILL BLANK
What command, depending on its options, can display the open TCP connections, the routing tables, as well as network interface statistics? (Specify only the command without any path or parameters.)
Answer:
Explanation:
netstat
NEW QUESTION 61
Which commands can you use to change a user's account aging information? (Choose THREE correct answers.)
- A. chattr
- B. chsh
- C. passwd
- D. chage
- E. usermod
Answer: C,D,E
NEW QUESTION 62
What is true regarding the statement beginning with #! that is found in the first line of script? (Choose two.)
- A. it triggers the installation of the script's interpreter.
- B. It is a comment that is ignored by the script interpreter.
- C. It specifies the path and the arguments of the interpreter used to run the script.
- D. It defines the character encoding of the script.
- E. It prevents the scripts from being executed until the ! is removed.
Answer: A,C
NEW QUESTION 63
Which parameter must be passed to ifconfig to activate a previously inactive network interface? (Specify the parameter only without any command, path or additional options)
Answer:
Explanation:
up
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 of the following IPv4 networks are reserved by IANA for private address assignment and private routing?
(Choose three.)
- A. 192.168.0.0/16
- B. 127.0.0.0/8
- C. 169.255.0.0/16
- D. 10.0.0.0/8
- E. 172.16.0.0/12
Answer: A,D,E
NEW QUESTION 66
What is true about the ntpdate command?
- A. It can be used by any user to set the user clock independently of the system clock.
- B. It updates the local system's date (i.e. day, month and year) but not the time (i.e. hours, minutes, seconds).
- C. It queries one or more NTP time servers and adjusts the system time accordingly.
- D. It sends the local system time to one or many remote NTP time servers for redistribution.
- E. It is the primary management command for the NTP time server.
Answer: C
NEW QUESTION 67
What is true about the file /etc/localtime?
- A. It is a plain text file containing a string such as Europe/Berlin.
- B. It is a symlink to /sys/device/clock/ltime and always contains the current local time.
- C. It is either a symlink to or a copy of a timezone information file such as
/usr/share/zoneinfo/Europe/Berlin. - D. It is created and maintained by the NTP service based on the geolocation of the system's IP address.
Answer: C
NEW QUESTION 68
What is true regarding public and private SSH keys? (Choose two.)
- A. For each user account, there is exactly one key pair that can be used to log into that account.
- B. To allow remote logins, the user's private key must be copied to the remote server.
- C. The private key must never be revealed to anyone.
- D. Several different public keys may be generated for the same private key.
- E. To maintain the private key's confidentiality, the SSH key pair must be created by its owner.
Answer: C,E
NEW QUESTION 69
When trying to unmount a device it is reported as being busy. Which of the following commands could be used to determine which process is causing this?
- A. traceroute
- B. nessus
- C. debug
- D. lsof
- E. strace
Answer: D
NEW QUESTION 70
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