LFCS Linux-Foundation Exam Questions and Free Practice Test

Question 61

Which of the following tools used for DNS debugging, reports not only the response from the name server but also details about the query?

A. dnsq

B. dig

C. hostname

D. dnslookup

E. zoneinfo

Correct Answer:B

Question 62

Where are user specific crontabs stored?

A. In the database file /etc/crontab.db which is shared by all users.

B. As individual per-user files within /var/spool/cron.

C. As individual per-user files in /etc/cron.user.d.

D. In the .crontab file in the user's home directory.

E. In the file /var/cron/user-crontab which is shared by all users.

Correct Answer:B

Question 63

What is the purpose of the command mailq?

A. It fetches new emails from a remote server using POP3 or IMAP.

B. It is a multi-user mailing list manager.

C. It is a proprietary tool contained only in the qmail MTA.

D. It queries the mail queue of the local MTA.

E. It is a command-line based tool for reading and writing emails.

Correct Answer:D

Question 64

CORRECT TEXT
Which command is used to sync the hardware clock to the system clock? (Specify ONLY the command without any path or parameters.)

Correct Answer:hwclock/sbin/hwclock/usr/sbin/hwclock

Question 65

CORRECT TEXT
After adding a new email alias to the configuration, which command must be run in order to ensure the MTA knows about it? (Specify the command without any path but including all required parameters.)

Correct Answer:newaliasessendmail-bi

Question 66

Which of the following commands lists all defined variables and functions within Bash?

A. env

B. set

C. env -a

D. echo $ENV

Correct Answer:B

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