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2021 Oct 102-400 free exam questions
Q11. - (Topic 1)
Which of the following SQL queries counts the number of occurrences for each value of the field order_type in the table orders?
A. SELECT order_type,COUNT(*) FROM orders WHERE order_type=order_type;
B. SELECT order_type,COUNT(*) FROM orders GROUP BY order_type;
C. COUNT(SELECT order_type FROM orders);
D. SELECT COUNT(*) FROM orders ORDER BY order_type;
E. SELECT AUTO_COUNT FROM orders COUNT order_type;
Answer: B
Q12. - (Topic 5)
Given the following routing table:
How would an outgoing packet to the destination 192.168.2.150 be handled?
A. It would be passed to the default router 192.168.178.1 on wlan0.
B. It would be directly transmitted on the device eth0.
C. It would be passed to the default router 255.255.255.0 on eth0.
D. It would be directly transmitted on the device wlan0.
E. It would be passed to the router 192.168.1.1 on eth0.
Answer: E
Q13. CORRECT TEXT - (Topic 6)
On a Linux system with shadow passwords enabled, which file in the file system contains the password hashes of all local users? (Specify the full name of the file, including path.)
Answer: /etc/shadow
Q14. - (Topic 1)
Which command makes the shell variable named VARIABLE visible to subshells?
A. export $VARIABLE
B. export VARIABLE
C. set $VARIABLE
D. set VARIABLE
E. env VARIABLE
Answer: B
Q15. CORRECT TEXT - (Topic 4)
After configuring printing on a Linux server, the administrator sends a test file to one of the printers and it fails to print. What command can be used to display the status of the printer's queue? (Specify ONLY the command without any path or parameters.)
Answer: lpq, /usr/bin/lpq, lpstat, /usr/bin/lpstat
Improved 102-400 practice exam:
Q16. - (Topic 5)
Which of the following commands can be used to display the local routing table? (Choose TWO correct answers.)
A. ifconfig
B. dig
C. netstat
D. route
E. trackroute
Answer: C,D
Q17. - (Topic 5)
Which of the following commands will help identify a broken router between the local and the remote machine?
A. ps
B. netstat
C. nslookup
D. ifconfig
E. traceroute
Answer: E
Q18. - (Topic 3)
Each entry in a crontab must end with what character?
A. Tab
B. Space
C. Backslash
D. Newline
Answer: D
Q19. CORRECT TEXT - (Topic 6)
What argument to the -type option of find will match files that are symbolic links? (Specify only the argument and no other options or words.)
Answer: l
Q20. - (Topic 3)
Which of the following commands can remove a user from a group?
A. grouprm
B. groupmod
C. passwd
D. usergroups
E. usermod
Answer: E