Why quoting rules prevent errors in Bash Scripting - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to safely print the variable content with spaces.

Bash Scripting

echo [1]

Drag options to blanks, or click blank then click option'

A$"var"

B$var

C'$var'

D"$var"

Attempts:

3 left

💡 Hint

Common Mistakes

Not quoting the variable causes word splitting.

Using single quotes prevents variable expansion.

Using double quotes around the variable ensures spaces are preserved and prevents word splitting.

2fill in blank

medium

Complete the code to assign a string with spaces to a variable correctly.

Bash Scripting

name=[1]

Drag options to blanks, or click blank then click option'

AJohn_Doe

B"John Doe"

C'John Doe'

DJohn Doe

Attempts:

3 left

💡 Hint

Common Mistakes

Not quoting causes syntax errors or splits the value.

Using unquoted spaces breaks the command.

Double quotes allow the string with spaces to be assigned as one value.

3fill in blank

hard

Fix the error in the command to safely list files with spaces in their names.

Bash Scripting

for file in [1]; do echo "$file"; done

Drag options to blanks, or click blank then click option'

A"*"

B*

C'*'

D\*

Attempts:

3 left

💡 Hint

Common Mistakes

Using unquoted * splits filenames with spaces.

Single quotes prevent globbing.

Using double quotes around * prevents word splitting and preserves filenames with spaces.

4fill in blank

hard

Fill both blanks to safely read a filename and print its content.

Bash Scripting

read -r filename
cat [1]$filename[2]

Drag options to blanks, or click blank then click option'

A"

B'

D\

Attempts:

3 left

💡 Hint

Common Mistakes

Not quoting the variable causes errors with spaces.

Using single quotes prevents variable expansion.

Double quotes around the variable prevent word splitting and preserve spaces in the filename.

5fill in blank

hard

Fill all three blanks to safely append a string with spaces to a file.

Bash Scripting

text=[1]
file=[2]
echo [3] >> "$file"

Drag options to blanks, or click blank then click option'

A"Hello World"

Boutput.txt

C$text

Doutput txt

Attempts:

3 left

💡 Hint

Common Mistakes

Not quoting strings with spaces causes errors.

Using unquoted variables in echo can split words.

File names with spaces need quotes.

Double quotes around the string preserve spaces; file name is simple; variable expansion is quoted in echo.