APPEND for string concatenation in Redis - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to append the string " World" to the key "greeting".

Redis

APPEND greeting [1]

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

A"Hello"

B"Redis"

C"!"

D" World"

Attempts:

3 left

💡 Hint

Common Mistakes

Using the wrong string to append.

Forgetting to put the string in quotes.

The APPEND command adds the specified string to the existing value of the key. Here, " World" is appended to "greeting".

2fill in blank

medium

Complete the code to append "!!!" to the key "message".

Redis

APPEND message [1]

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

A"!!!"

B"..."

C"!!! "

D"???"

Attempts:

3 left

💡 Hint

Common Mistakes

Adding extra spaces unintentionally.

Using wrong punctuation marks.

Appending "!!!" adds exclamation marks to the existing message string.

3fill in blank

hard

Fix the error in the code to append "_end" to the key "filename".

Redis

APPEND filename [1]

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

A_end

B"_end"

C'_end'

Dend

Attempts:

3 left

💡 Hint

Common Mistakes

Not using quotes around the string.

Using single quotes which Redis does not recognize.

The string to append must be enclosed in double quotes for Redis commands.

4fill in blank

hard

Fill both blanks to append "_2024" to the key "report" and then append ".pdf".

Redis

APPEND report [1]
APPEND report [2]

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

A"_2024"

B".pdf"

C"_2023"

D".doc"

Attempts:

3 left

💡 Hint

Common Mistakes

Appending wrong year or extension.

Forgetting quotes around strings.

First append "_2024" then append ".pdf" to build the full filename.

5fill in blank

hard

Fill all three blanks to append "_final", then "_v2", and finally ".txt" to the key "document".

Redis

APPEND document [1]
APPEND document [2]
APPEND document [3]

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

A"_final"

B"_v2"

C".txt"

D".docx"

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up the order of appends.

Using wrong file extension.

Appending these strings in order builds the full document name.