Question 1

The BASH shell assumes stdout in the absence of a numeric file descriptor. _________________________

Accepted Answer

By default, if no file descriptor is specified, the output is sent to stdout (file descriptor 1). Therefore, the BASH shell assumes stdout in the absence of a numeric file descriptor.

Question 2

The ENV environment variable represents the location of the BASH run-time configuration file. _________________________

Accepted Answer

The ENV variable points to the location of the BASH run-time configuration file.

Question 3

The file descriptor stdin is represented by the number ____.
A) 0
B) 1
C) 2
D) 3

Accepted Answer

The file descriptor stdin is represented by the number 0.

Question 4

You can use the sed command to remove unwanted lines of text.

Accepted Answer

The sed command is commonly used for text manipulation, including removing unwanted lines of text.

Question 5

Users can create their own custom variables, called shell variables. _________________________

Accepted Answer

user-defined

Question 6

To prevent a file from being cleared by the BASH shell and append output to the existing output, you can specify three > metacharacters alongside the file descriptor.

Accepted Answer

To append output to an existing file in the BASH shell, you use two greater-than signs (>>) alongside the file name, not three.

Question 7

To see a list of the environment variables and their current values on a system, you can use the ____ command.
A) env
B) get
C) set
D) setenv

Accepted Answer

The answer of To see a list of the environment...

Question 8

The ____ command counts the number of lines, words, and characters in a file.
A) pr
B) nl
C) tr
D) wc

Accepted Answer

The wc command is used to count the number of lines, words, and characters in a file. The options -l, -w, and -c can be used to count only the lines, words, or characters respectively.

Question 9

You can redirect a file to the standard input of a command using the ____ metacharacter.
A) >
B) #
C) |
D) <

Accepted Answer

The < metacharacter is used to redirect input from a file into the standard input of a command.

Question 10

You can send the standard output of one command to another command as standard input using the ____ shell metacharacter.
A) <
B) |
C) >
D) #

Accepted Answer

The pipe "|" shell metacharacter is used to redirect the standard output of one command to the standard input of another command.

Question 11

Given the syntax command && command, the command on the left of the && construct is executed only if the command on the right of the && construct completed successfully.

Accepted Answer

The command on the left of the && construct is executed first, and the command on the right is executed only if the first command completes successfully.

Question 12

The file descriptor stderr is represented by the number ____.
A) 0
B) 1
C) 2
D) 3

Accepted Answer

stderr is the standard error file descriptor, which is represented by the number 2.

Question 13

Most configuration files on Linux systems are delimited using ____ characters.
A) tab
B) colon
C) space
D) semicolon

Accepted Answer

Most configuration files on Linux systems are delimited using colon characters, also known as colons. Examples of such files include /etc/passwd and /etc/group files, which contain user and group information, respectively. The colon character serves as a separator between the various fields within these files.

Question 14

You are limited to using one pipe | metacharacter on the command line to pipe information from one command to another command.

Accepted Answer

You can use multiple pipe | metacharacters in a command line to pass output from one command as input to another command, chaining multiple commands together.

Question 15

The ____ command can be used to replace characters in a file sent via Standard Input.
A) tr
B) rt
C) ts
D) st

Accepted Answer

The tr command is used to replace characters in a file or in Standard Input.

Question 16

In a decision construct, you can have an unlimited number of if then statements. _________________________

Accepted Answer

elif

Question 17

The ____ command can be used to extract, manipulate, and format text using pattern-action statements.
A) sed
B) grep
C) awk
D) nl

Accepted Answer

The awk command is used to extract, manipulate, and format text using pattern-action statements. It can be used to perform various operations such as searching, replacing, filtering, sorting, and formatting text data stored in files. Sed (A) is a stream editor used for performing basic text transformations on an input stream, while grep (B) is used to search for a specific pattern in a file. nl (D) is used to number the lines in a file.

Question 18

Any command that can be executed on the command line can also be placed inside any environment file.

Accepted Answer

Any command that can be executed on the command line can also be included in environment files, such as .bashrc or .bash_profile. These files are executed when a new shell session is started, allowing for the automatic execution of commands and customization of the shell environment.

Question 19

You can use the BASH shell to redirect standard output and standard error from the terminal screen to a file on the filesystem using the ____ shell metacharacter followed by the absolute or relative pathname of the file.
A) #
B) <
C) >
D) |

Accepted Answer

The ">" shell metacharacter is used to redirect standard output to a file, while "2>" is used to redirect standard error to a file. For example, "command > output.txt 2> error.txt" would redirect standard output to "output.txt" and standard error to "error.txt".

Question 20

Aliases are shortcuts to commands stored in special variables that can be created and viewed using the alias command. _________________________

Accepted Answer

Aliases are indeed shortcuts to commands that can be created and viewed using the alias command.

Quiz 7: Working With the Bash Shell

The BASH shell assumes stdout in the absence of a numeric file descriptor. _________________________

The ENV environment variable represents the location of the BASH run-time configuration file. _________________________

The file descriptor stdin is represented by the number ____.

You can use the sed command to remove unwanted lines of text.

Users can create their own custom variables, called shell variables. _________________________

To prevent a file from being cleared by the BASH shell and append output to the existing output, you can specify three > metacharacters alongside the file descriptor.

To see a list of the environment variables and their current values on a system, you can use the ____ command.

The ____ command counts the number of lines, words, and characters in a file.

You can redirect a file to the standard input of a command using the ____ metacharacter.

You can send the standard output of one command to another command as standard input using the ____ shell metacharacter.

Given the syntax command && command, the command on the left of the && construct is executed only if the command on the right of the && construct completed successfully.

The file descriptor stderr is represented by the number ____.

Most configuration files on Linux systems are delimited using ____ characters.

You are limited to using one pipe | metacharacter on the command line to pipe information from one command to another command.

The ____ command can be used to replace characters in a file sent via Standard Input.

In a decision construct, you can have an unlimited number of if then statements. _________________________

The ____ command can be used to extract, manipulate, and format text using pattern-action statements.

Any command that can be executed on the command line can also be placed inside any environment file.

You can use the BASH shell to redirect standard output and standard error from the terminal screen to a file on the filesystem using the ____ shell metacharacter followed by the absolute or relative pathname of the file.

Aliases are shortcuts to commands stored in special variables that can be created and viewed using the alias command. _________________________