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2021 Sep 102-400 test
Q1. CORRECT TEXT - (Topic 6)
With X11 forwarding in ssh, what environment variable is automatically set in the remote host shell that is not set when X11 forwarding is not enabled? (Specify only the environment variable without any additional commands or values.)
Answer: DISPLAY, $DISPLAY
Q2. - (Topic 1)
What is the purpose of the file /etc/profile?
A. It contains the welcome message that is displayed after login.
B. It contains security profiles defining which users are allowed to log in.
C. It contains environment variables that are set when a user logs in.
D. It contains default application profiles for users that run an application for the first time.
Answer: C
Q3. - (Topic 5)
Which of the following may occur as a consequence of using the command ifconfig? (Choose THREE correct answers.)
A. New name servers may be added to the resolver configuration.
B. Network interfaces may become active or inactive.
C. The routing table may change.
D. IP addresses may change.
E. The system's host name may change.
Answer: B,C,D
Q4. - (Topic 4)
Which of the following are syslog facilities? (Choose TWO correct answers.)
A. local7
B. mail
C. advanced
D. postmaster
E. remote
Answer: A,B
Q5. - (Topic 4)
Which of the following is observed and corrected by a NTP client?
A. The skew in time between the system clock and the hardware clock.
B. The skew in time between the system clock and the reference clock.
C. Changes in the time zone of the current computer's location.
D. Adjustments needed to support Daylight Saving Time.
Answer: B
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Q6. CORRECT TEXT - (Topic 6)
Which file lists which users can execute commands using sudo? (Specify the full name of the file, including path.)
Answer: /etc/sudoers
Q7. - (Topic 1)
What output will the command seq 10 produce?
A. A continuous stream of numbers increasing in increments of 10 until stopped.
B. The numbers 1 through 10 with one number per line.
C. The numbers 0 through 9 with one number per line.
D. The number 10 to standard output.
Answer: B
Topic 2, User Interfaces and Desktops
Q8. - (Topic 1)
How can the existing environment variable FOOBAR be suppressed for the execution of the script./myscript only?
A. unset -v FOOBAR;./myscript
B. set -a FOOBAR="";./myscript
C. env -u FOOBAR./myscript
D. env -i FOOBAR./myscript
Answer: C
Q9. CORRECT TEXT - (Topic 2)
What is the name of the simple graphical login manager that comes with a vanilla X11 installation? (Specify ONLY the command without any path or parameters.)
Answer: xdm
Q10. - (Topic 5)
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
Answer: B