All About 102-400 study guide Feb 2021

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Q25. - (Topic 3) 

Which of the following crontab entries will execute myscript at 30 minutes past every hour on Sundays? 

A. 0 * * * 30 myscript 

B. 30 * * * 6 myscript 

C. 30 0 * * 0 myscript 

D. 30 0-23 * * 0 myscript 

E. 0 0-23 * * 30 myscript 

Answer: D 

Q26. - (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 

Q27. - (Topic 1) 

What output will the following command produce? 

seq 1 5 20 

A. 1 6 1 1 1 6 

B. 1 5 10 15 

C. 1 2 3 4 

D. 2 3 4 5 

E. 5 10 15 20 

Answer: A 

Q28. - (Topic 6) 

Which configuration file would be edited to change default options for the OpenSSH server? 

A. /etc/ssh/sshd_config 

B. /etc/ssh/ssh 

C. /etc/ssh/server 

D. /etc/ssh/ssh_config 

E. /etc/ssh/ssh_server 

Answer: A 

Q29. - (Topic 4) 

Which of the following is a legacy program provided by CUPS for sending files to the printer queues on the command line? 

A. lpd 

B. lpp 

C. lpq 

D. lpr 

Answer: D 

Q30. - (Topic 6) 

Which configuration file would be edited to change the default options for outbound SSH sessions? 

A. /etc/ssh/sshd_config 

B. /etc/ssh/ssh 

C. /etc/ssh/client 

D. /etc/ssh/ssh_config 

E. /etc/ssh/ssh_client 

Answer: D 

Q31. - (Topic 4) 

Which of the following parameters are used for journalctl to limit the time frame of the output? (Choose TWO correct answers.) 

A. --from= 

B. --since= 

C. --until= 

D. --upto= 

E. --date= 

Answer: B,C 

Q32. - (Topic 1) 

What output will the following command sequence produce? 

echo '1 2 3 4 5 6' | while read a b c; do 

echo result: $c $b $a; 

done 

A. result: 3 4 5 6 2 1 

B. result: 1 2 3 4 5 6 

C. result: 6 5 4 

D. result: 6 5 4 3 2 1 

E. result: 3 2 1 

Answer: A