Collection functions (length, flatten, merge) in Terraform - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to get the number of elements in the list.

Terraform

length = length([1])

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

A[1, 2, 3, 4]

B["apple", "banana", "cherry"]

C[]

D[true, false]

Attempts:

3 left

💡 Hint

Common Mistakes

Using an empty list which returns 0.

Using a non-list value which causes an error.

The length function returns the number of elements in the list. Here, the list has 3 elements.

2fill in blank

medium

Complete the code to flatten a list of lists into a single list.

Terraform

flat_list = flatten([1])

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

A["a", "b", "c"]

B[1, 2, 3, 4]

C[["a"], ["b", "c"]]

D[[1, 2], [3, 4]]

Attempts:

3 left

💡 Hint

Common Mistakes

Passing a flat list which does nothing.

Passing a non-list or empty list.

The flatten function takes a list of lists and combines all inner lists into one single list.

3fill in blank

hard

Fix the error in the merge function to combine two maps correctly.

Terraform

combined = merge([1], {"key2" = "value2"})

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

A["key1" = "value1"]

B["key1", "value1"]

C{"key1" = "value1"}

D{"key1", "value1"}

Attempts:

3 left

💡 Hint

Common Mistakes

Using lists instead of maps.

Using incorrect syntax for maps.

The merge function requires maps as arguments. Option C is a valid map with key-value pairs.

4fill in blank

hard

Fill both blanks to create a map with keys as strings and values as lengths of words longer than 4 characters.

Terraform

result = { [1] : length([2]) for word in words if length(word) > 4 }

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

Aword

C"word"

Dwords

Attempts:

3 left

💡 Hint

Common Mistakes

Using string literals as keys instead of variables.

Using the whole list instead of the single word.

The key should be the variable word itself (not a string literal), and the value is the length of that word.

5fill in blank

hard

Fill all three blanks to create a merged map with uppercase keys and values greater than 3.

Terraform

filtered = { [1] : [2] for k, v in merge(map1, map2) if [3] }

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

Ak.upper()

Bv

Cv > 3

Dk

Attempts:

3 left

💡 Hint

Common Mistakes

Using original keys without uppercase.

Filtering with wrong conditions.

Swapping keys and values.

The keys are converted to uppercase with k.upper(), values are v, and the filter keeps values greater than 3.