Question 1

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

Accepted Answer

A) True 
 B)False

Question 2

​What two BASH environment variables represent the current working directory, and the absolute pathname of the current shell, respectively?

Accepted Answer

A)   ​PWD
B)   ​CWD
C)   ​PATH
D)   ​SHELLE) B) and C)
F) All of the above

Question 3

Select the escape sequence that starts a new line when used with echo:

Accepted Answer

A)   ​\
B)   ​\a
C)   ​

D)   ​E) C) and D)
F) A) and B)

Question 4

What number represents the stdin file descriptor?

Accepted Answer

A)   0
B)   1
C)   2
D)   3E) B) and D)
F) None of the above

Question 5

Explain the while construct, and demonstrate how it can be used.

Accepted Answer

The while construct is a common loop con...

Question 6

In an if construct, what statements are optional?​

Accepted Answer

A)   ​fi
B)   ​elif
C)   ​else
D)   ​thenE) All of the above
F) C) and D)

Question 7

The ____________________ environment variable contains a list of directories to search for executable programs.

Accepted Answer

PATH

Question 8

​What operator below is known as the NOT operator?

Accepted Answer

A)   ​-o
B)   ​-a
C)   ​!
D)   ​%E) B) and C)
F) All of the above

Question 9

Select the test statement that can be used to determine if A is numerically greater than B:

Accepted Answer

A)   [ A -g B ]
B)   [ A -ge B ]
C)   [ A -gt B ]
D)   [ A +eq B ]E) C) and D)
F) A) and C)

Question 10

The standard output and standard error from a terminal screen within the BASH shell can be redirected to a file on the filesystem using what shell metacharacter, followed by the absolute or relative pathname of the file?

Accepted Answer

A)   #
B)   
C)   >
D)   |E) A) and D)
F) All of the above

Question 11

A list of all exported environment and user-defined variables in a shell can be viewed with what command below?

Accepted Answer

A)   env
B)   set
C)   setenv
D)   getenvE) A) and B)
F) All of the above A

Question 12

What character is used to delimit most Linux configuration files?

Accepted Answer

A)   tab
B)   colon
C)   space
D)   semicolonE) A) and D)
F) A) and C)

Question 13

What environment file is always executed immediately after login for all users on the system, and sets most environment variables, such as HOME and PATH?

Accepted Answer

A)   ˜/.bash_profile
B)   ˜/.bash_login
C)   /etc/profile
D)   ˜/.profileE) A) and C)
F) None of the above

Question 14

Describe what file descriptors are, and then list three that can be used within the BASH shell, and discuss how they can be used.

Accepted Answer

Command input and output are represented by labels known as file descriptors. For each command that can be manipulated by the BASH shell, there are three file descriptors:
Standard input (stdin)
Standard output (stdout)
Standard error (stderr)
Standard input (stdin) refers to the information processed by the command during execution; this often takes the form of user input typed on the keyboard. Standard output (stdout) refers to the normal output of a command, whereas standard error (stderr) refers to any error messages generated by the command. Both stdout and stderr are displayed on the terminal screen by default.

Question 15

The default BASH shell prompt is set by an environment variable. What command can be used to view this variable?

Accepted Answer

A)   ls $PWD
B)   echo #PWD
C)   echo $PS1
D)   ls #PS1E) B) and D)
F) A) and C)

Question 16

Select the escape sequence that is used for a form feed:

Accepted Answer

A)

B)   \f
C)   /f
D)   /nE) B) and C)
F) A) and C)

Question 17

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

A) True 
 B)False

Question 18

​Match each correct item with the statement below.​
a.​counter variable
b.decision construct​
c.​environment variables
d.​file descriptors
e.​hashpling
f.loop construct​
g.​redirection
h.Standard Error (stderr)​
i.​Standard Input (stdin)
j.Standard Output (stdout)
-​A special construct used in a shell script to alter the flow of the program based on the outcome of a command or contents of a variable. Common decision constructs include if, case, &&, and ||.

Accepted Answer

The answer of ​Match each correct item with the statement...

Question 19

What permissions are required to execute a shell script in a manner similar to any other executable program on the system?

Accepted Answer

A)   read
B)   write and read
C)   execute
D)   read and executeE) None of the above
F) A) and D)

Question 20

The ability to extract, manipulate, and format text using pattern action statements belongs to which command below?

Accepted Answer

A)   sed
B)   grep
C)   awk
D)   nlE) C) and D)
F) B) and C)

Exam 7: Working With the Bash Shell

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

Correct Answer
verified

What two BASH environment variables represent the current working directory, and the absolute pathname of the current shell, respectively?

Correct Answer
verified

Select the escape sequence that starts a new line when used with echo:

Correct Answer
verified

What number represents the stdin file descriptor?

Correct Answer
verified

Explain the while construct, and demonstrate how it can be used.

Correct Answer
verified
The while construct is a common loop con...
View Answer

In an if construct, what statements are optional?

Correct Answer
verified

The ____________________ environment variable contains a list of directories to search for executable programs.

Correct Answer
verified
PATH

What operator below is known as the NOT operator?

Correct Answer
verified

Select the test statement that can be used to determine if A is numerically greater than B:

Correct Answer
verified

The standard output and standard error from a terminal screen within the BASH shell can be redirected to a file on the filesystem using what shell metacharacter, followed by the absolute or relative pathname of the file?

Correct Answer
verified

A list of all exported environment and user-defined variables in a shell can be viewed with what command below?

Correct Answer
verified
A

What character is used to delimit most Linux configuration files?

Correct Answer
verified

What environment file is always executed immediately after login for all users on the system, and sets most environment variables, such as HOME and PATH?

Correct Answer
verified

Describe what file descriptors are, and then list three that can be used within the BASH shell, and discuss how they can be used.

The default BASH shell prompt is set by an environment variable. What command can be used to view this variable?

Correct Answer
verified

Select the escape sequence that is used for a form feed:

Correct Answer
verified

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.

Correct Answer
verified

Correct Answer
verified

What permissions are required to execute a shell script in a manner similar to any other executable program on the system?

Correct Answer
verified

The ability to extract, manipulate, and format text using pattern action statements belongs to which command below?

Correct Answer
verified

Exam 7: Working With the Bash Shell

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

Correct AnswerverifiedShow Answer

​What two BASH environment variables represent the current working directory, and the absolute pathname of the current shell, respectively?

Correct AnswerverifiedShow Answer

Select the escape sequence that starts a new line when used with echo:

Correct AnswerverifiedShow Answer

What number represents the stdin file descriptor?

Correct AnswerverifiedShow Answer

Explain the while construct, and demonstrate how it can be used.

Correct AnswerverifiedThe while construct is a common loop con...View AnswerShow Answer

In an if construct, what statements are optional?​

Correct AnswerverifiedShow Answer

The ____________________ environment variable contains a list of directories to search for executable programs.

Correct AnswerverifiedPATH

​What operator below is known as the NOT operator?

Correct AnswerverifiedShow Answer

Select the test statement that can be used to determine if A is numerically greater than B:

Correct AnswerverifiedShow Answer

The standard output and standard error from a terminal screen within the BASH shell can be redirected to a file on the filesystem using what shell metacharacter, followed by the absolute or relative pathname of the file?

Correct AnswerverifiedShow Answer

A list of all exported environment and user-defined variables in a shell can be viewed with what command below?

Correct AnswerverifiedA

What character is used to delimit most Linux configuration files?

Correct AnswerverifiedShow Answer

What environment file is always executed immediately after login for all users on the system, and sets most environment variables, such as HOME and PATH?

Correct AnswerverifiedShow Answer

Describe what file descriptors are, and then list three that can be used within the BASH shell, and discuss how they can be used.

The default BASH shell prompt is set by an environment variable. What command can be used to view this variable?

Correct AnswerverifiedShow Answer

Select the escape sequence that is used for a form feed:

Correct AnswerverifiedShow Answer

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.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

What permissions are required to execute a shell script in a manner similar to any other executable program on the system?

Correct AnswerverifiedShow Answer

The ability to extract, manipulate, and format text using pattern action statements belongs to which command below?

Correct AnswerverifiedShow Answer

Correct Answer
verified

What two BASH environment variables represent the current working directory, and the absolute pathname of the current shell, respectively?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
The while construct is a common loop con...
View Answer

In an if construct, what statements are optional?

Correct Answer
verified

Correct Answer
verified
PATH

What operator below is known as the NOT operator?

Correct Answer
verified

Correct Answer
verified

Correct Answer
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Correct Answer
verified
A

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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