102-400 Online Practice Questions and Answers

In an xinetd configuration file, which attribute specifies the network address that will be used to provide the service?

When the command echo $ outputs 1, which of the following statements is true?

A. It is the process ID of the echo command.

B. It is the process ID of the current shell.

C. It is the exit value of the command executed immediately before echo.

D. It is the exit value of the echo command.

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

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.

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.

The X11 configuration file xorg.conf is grouped into sections.

How is the content of the section SectionName associated with that section?

A. It is placed in curly brackets as in Section SectionName { ... }.

B. It is placed between a line containing Section "SectionName" and a line containing EndSection.

C. It is placed between the tags

D. It is placed after the row [SectionName].

E. It is placed after an initial unindented Section "SectionName" and must be indented by exactly one tab character.

What is the purpose of the iconv command?

A. It converts bitmap images from one format to another such as PNG to JPEG.

B. It verifies that the root directory tree complies to all conventions from the Filesystem Hierarchy Standard (FHS).

C. It displays additional meta information from icon files ending in .ico.

D. It changes the mode of an inode in the ext4 file system.

E. It converts files from one character encoding to another.

What is true regarding a default route?

A. The default route is always used first. When the default route is not available more specific routes are tried.

B. When a default route is set, all other routes are disabled until the default route is deleted.

C. The default route is only used if there is not a more specific route to a destination host or network.

D. Without a default route, no network communication even in directly attached networks is possible.

Which of the following is a valid IPv6 address?

A. 2001:db8:3241::1

B. 2001::db8:4581::1

C. 2001:db8:0g41::1

D. 2001%db8%9990%%1

E. 2001.db8.819f..1

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

A. substitute

B. nameserver

C. search

D. lookup

E. method