What is a common disadvantage of using dynamic blocks in Terraform?

What is a common disadvantage of using dynamic blocks in Terraform?

• A. They cannot be used to loop through a list of values
• B. Dynamic blocks can construct repeatable nested blocks
• C. They make configuration harder to read and understand
• D. Terraform will run more slowly

Answer: (C)

Dynamic blocks generate repeated nested blocks from a list or map, which helps avoid duplication when the number of nested blocks varies. The trade-off is readability: introducing this level of indirection can make the configuration harder to follow at a glance, especially if nesting is deep or the logic inside the dynamic block is complex. This increased cognitive load is the common drawback, even though dynamic blocks are powerful for handling variable inputs. The ability to loop through values and construct repeatable nested blocks is a strength, and they don’t inherently slow Terraform runs in a meaningful way, so those aspects aren’t disadvantages.

Dynamic blocks generate repeated nested blocks from a list or map, which helps avoid duplication when the number of nested blocks varies. The trade-off is readability: introducing this level of indirection can make the configuration harder to follow at a glance, especially if nesting is deep or the logic inside the dynamic block is complex. This increased cognitive load is the common drawback, even though dynamic blocks are powerful for handling variable inputs. The ability to loop through values and construct repeatable nested blocks is a strength, and they don’t inherently slow Terraform runs in a meaningful way, so those aspects aren’t disadvantages.