Question 1

What is a purpose of an SSH host key?

Accepted Answer

An SSH host key provides the server's identity information to connecting SSH clients. When a client connects to a server, the server presents its host key to the client. The client compares the key with its known host keys to check the server's identity. If the keys match, the client can trust that it is communicating with the intended server and not a malicious third party trying to intercept the connection.

Question 2

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

Accepted Answer

The $ variable expands to the exit status of the last executed command. Therefore, if echo $ outputs 1, it means that the command executed immediately before echo had an exit status of 1.

Question 3

SIMULATION What word is missing from the following SQL statement?    __________ count(*) from tablename; (Please specify the missing word using lower-case letters only.)

Accepted Answer

The answer of SIMULATION What word is missing from the...

Question 4

The X11 configuration file xorg.conf is grouped into sections. How is the content of the section SectionName associated with that section?

Accepted Answer

The content of a section is associated with that section by placing it between a line containing Section "SectionName" and a line containing EndSection. This is the standard syntax for defining sections in xorg.conf.

Question 5

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

Accepted Answer

GOK (Gnome On-Screen Keyboard) is a program that provides an on-screen keyboard for accessibility assistance. It is commonly available on Linux distributions with the Gnome desktop environment. Option A (xkb) is not a program but rather X Keyboard Extension which provides more advanced keyboard configuration options. Option B (atkb) does not exist as a program. Option D (xOSK) is also not a program but rather a made-up name.

Question 6

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

Accepted Answer

The configuration file that is used to change default options for the OpenSSH server is the /etc/ssh/sshd_config file. This file contains various settings for the OpenSSH server, including options for authentication, logging, port number, and more. Editing this file allows you to customize the behavior of the OpenSSH server to meet your specific needs. The other options listed (B, C, D, E) are either incorrect file names or do not pertain to the configuration of the OpenSSH server.

Question 7

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?

Accepted Answer

The command lsof (list open files) can be used to determine which process is using a device or file, which can help identify why it is busy and unable to be unmounted. The other options (debug, nessus, strace, traceroute) are not relevant for this task.

Question 8

Which of the following are requirements in order to run a shell script like a regular command from anywhere in the filesystem?

Accepted Answer

The answer of Which of the following are requirements in...

Question 9

SIMULATION Which command can be used to investigate the properties for a particular window in X by clicking that window? (Specify ONLY the command without any path or parameters.)

Accepted Answer

The answer of SIMULATION Which command can be used to...

Question 10

Which of the following are tasks handled by a display manager like XDM or KDM?

Accepted Answer

The answer of Which of the following are tasks handled...

Question 11

SIMULATION 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.)

Accepted Answer

The answer of SIMULATION What is the name of the...

Question 12

Which of the following SQL queries counts the number of occurrences for each value of the field order_type in the table orders?

Accepted Answer

Using the GROUP BY clause allows us to group the results by the values of the order_type field, and then count the number of occurrences for each group using the COUNT(*) function. Option A does not group the results and will only count the occurrences for one specific value of order_type. Option C is not a valid SQL syntax. Option D only returns a single count of all the rows. Option E is not a valid SQL syntax and does not make sense in this context.

Question 13

SIMULATION What word is missing from the following SQL statement?    insert into tablename ________(909, 'text'); (Please specify the missing word using lower-case letters only.)

Accepted Answer

The answer of SIMULATION What word is missing from the...

Question 14

SIMULATION By default, the contents of which directory will be copied to a new user's home directory when the account is created by passing the -m option to the useradd command? (Specify the full path to the directory.)

Accepted Answer

The answer of SIMULATION By default, the contents of which...

Question 15

Which of the following files, when existing, affect the behavior of the Bash shell?

Accepted Answer

~/.bashrc and ~/.bash_profile are files that affect the behavior of the Bash shell when they exist.

Question 16

SIMULATION What command displays all aliases defined in the current shell? (Specify the command without any path information)

Accepted Answer

The answer of SIMULATION What command displays all aliases defined...

Question 17

SIMULATION What is the default name of the configuration file for the Xorg X11 server? (Specify the file name only without any path.)

Accepted Answer

The answer of SIMULATION What is the default name of...

Question 18

Which of the following commands can be used to limit the amount of memory a user may use?

Accepted Answer

The `ulimit` command is used to set limits on the resources available to the shell and processes started by it, including memory usage.

Question 19

Which of the following words is used to restrict the records that are returned from a SELECT SQL query based on a supplied criteria for the values in the records?

Accepted Answer

The WHERE clause is used to restrict the records that are returned from a SELECT SQL query based on a supplied criteria for the values in the records. The CASE statement is used to perform conditional operations within a SQL statement. The FROM clause specifies the table from which the data is being selected. The IF statement is not used in SQL, instead, you can use the CASE statement for conditional logic.

Question 20

How can the existing environment variable FOOBAR be suppressed for the execution of the script./myscript only?

Accepted Answer

The "-u" option in the env command allows for specifying an environment variable to be unset for the duration of the command being executed. Therefore, using "env -u FOOBAR" before calling "./myscript" will set the environment variable FOOBAR to be empty for the duration of executing "myscript".

Exam 5: LPI Level 1 Exam 102, Junior Level Linux Certification, Part 2 of 2