102-400 Exam Questions

When the command echo $$ outputs 12942, what is the meaning of 12942?

What is the purpose of a screen reader?

How is a display manager started?

Which of the following commands shows the current color depth of the X Server?

For accessibility assistance, which of the following programs is an on-screen keyboard?

Which of the following are tasks handled by a display manager like XDM or KDM? (Choose TWO correct answers.)

Which of the following steps prevents a user from obtaining an interactive login session?

Which character in the password field of /etc/passwd is used to indicate that the encrypted password is stored in /etc/shadow?

Which of the following fields are available in both the global /etc/crontab file as well as in user- specific crontab files? (Select TWO correct answers)

Which command can be used to delete a group from a Linux system?

What is the purpose of the iconv command?

In case neither cron.allow nor cron.deny exist in /etc/, which of the following is true?

Which of the following commands can remove a user from a group?

Where are user specific crontabs stored?

Which file contains the date of the last change of a user's password?

Each entry in a crontab must end with what character?

What is true regarding the command userdel --force --remove bob? (Choose TWO correct answers.)

Which of the following fields can be found in the /etc/group file? (Choose THREE correct answers.)

Why is the correct configuration of a system's time zone important?

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

Which of the following are commonly used Mail Transfer Agent (MTA) applications? (Choose THREE correct answers.)

Which of the following is observed and corrected by a NTP client?

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

What entry can be added to the syslog.conf file to have all syslog messages generated by a system displayed on console 12?

What is true about the ntpdate command?

What is true regarding the file ~/.forward?

Which of the following commands is used to rotate, compress, and mail system logs?

What is the command to delete the default gateway from the system IP routing table? (Choose TWO correct answers.)

What is the purpose of the nsswitch.conf file?

Which of the following commands will help identify a broken router between the local and the remote machine?

Which of the following details is NOT provided in any output from the netstat utility?

Which of the following commands can be used to display the local routing table? (Choose TWO correct answers.)

Which of the following is true about IPv6?

What is true regarding a default route?

Which of the following keywords can be used in the file /etc/nsswitch.conf to specify a source for host name lookups? (Choose TWO correct answers.)

Which of the following may occur as a consequence of using the command ifconfig? (Choose THREE correct answers.)

What is true regarding TCP port 23?

Which of the following statements is valid in the file /etc/nsswitch.conf?

Which of the following IPv4 networks are reserved by IANA for private address assignment and private routing? (Choose THREE correct answers.)

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

What of the following can be done by the command ifconfig? (Choose TWO correct answers.)

Which of the following programs can be used to determine the routing path to a given destination?

Given the following routing table: How would an outgoing packet to the destination 192.168.2.150 be handled?

Which of the following is a valid IPv6 address?

Which of the following keywords can be used in the file /etc/resolv.conf? (Choose TWO correct answers.)

On a regular users workstation the route command takes a long time before printing out the routing table. Which of the following errors does that indicate?

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

Which of the following programs uses the hosts.allow file to perform its main task of checking for access control restrictions to system services?

Which command is used to set restrictions on the size of a core file that is created for a user when a program crashes?

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?