test command and [ ] syntax in Bash Scripting - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to check if the variable 'file' exists.

Bash Scripting

if [ -e [1] ]; then echo "File exists"; fi

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

Afile

B$file

C"file"

D$FILE

Attempts:

3 left

💡 Hint

Common Mistakes

Forgetting the $ before the variable name inside [ ]

Using quotes incorrectly around the variable

In bash, to check the value of a variable inside [ ], you must use $ before the variable name.

2fill in blank

medium

Complete the code to test if the variable 'num' is equal to 10 using the test command.

Bash Scripting

if test [1] -eq 10; then echo "Number is 10"; fi

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

A$num

Bnum

C"num"

D$NUM

Attempts:

3 left

💡 Hint

Common Mistakes

Using variable name without $

Putting quotes around the variable name

The test command needs the variable's value, so use $num to get it.

3fill in blank

hard

Fix the error in the code to correctly check if the string variable 'word' is empty.

Bash Scripting

if [ [1] = "" ]; then echo "Empty string"; fi

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

Aword

B$WORD

C"word"

D$word

Attempts:

3 left

💡 Hint

Common Mistakes

Using variable name without $

Using quotes around the variable name

Inside [ ], use $word to get the variable's value for comparison.

4fill in blank

hard

Fill both blanks to check if the file stored in 'filename' is readable and writable.

Bash Scripting

if [ [1] -r [2] ]; then echo "File is readable"; fi

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

A-r

B$filename

C-w

Dfilename

Attempts:

3 left

💡 Hint

Common Mistakes

Using variable name without $

Mixing up -r and -w flags

Use $filename to get the file name and -r to check readability inside [ ].

5fill in blank

hard

Fill all three blanks to create a test that checks if the variable 'count' is greater than 5 and less than 10.

Bash Scripting

if [ [1] [2] 5 ] && [ [3] -lt 10 ]; then echo "Count is between 6 and 9"; fi

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

A$count

B-gt

D-lt

Attempts:

3 left

💡 Hint

Common Mistakes

Forgetting $ before variable

Using wrong comparison operators

Use $count to get the variable's value, -gt to check greater than, and $count again for the second test.