Terraform: Data Sources

What is the purpose of data sources in Terraform?

• To create, update, and delete infrastructure objects

• To read information defined outside of Terraform

• To export attributes for use in configuration

• To manage resource dependencies

Answer explanation

The purpose of data sources in Terraform is to read information defined outside of Terraform, allowing the configuration to reference external data for use in the infrastructure setup.

How is a data resource declared in Terraform?

• Using a provider block

• Using a data block

• Using a module block

• Using a resource block

Answer explanation

A data resource is declared in Terraform using a data block.

What is the purpose of the most_recent argument in a data block?

• To specify the owners of the data source

• To define the tags for the data source

• To export the result under a local name

• To retrieve the most recent data from the source

Answer explanation

The most_recent argument in a data block is used to retrieve the most recent data from the source, ensuring that the latest information is accessed.

When does Terraform defer reading data resources?

• When the data resource has multiple resource instances

• When the data resource is local-only

• When the data resource depends on a managed resource with planned changes

• When the data resource has custom conditions

Answer explanation

Terraform defers reading data resources when they depend on a managed resource with planned changes, ensuring accurate data retrieval.

What is the purpose of the depends_on meta-argument in data blocks?

• To specify assumptions and guarantees about the data source

• To customize the lifecycle of data resources

• To defer reading the data source until after all dependencies have been applied

• To ensure data sources access up-to-date information

Answer explanation

The depends_on meta-argument in data blocks is used to defer reading the data source until after all dependencies have been applied.

What behavior do local-only data sources exhibit in Terraform?

• They read data resources during the planning phase

• They have customization settings available for their lifecycle

• They calculate results and expose them for use within Terraform

• They access infrastructure objects via a remote network API

Answer explanation

Local-only data sources calculate results and expose them for use within Terraform, making them available for use in the configuration.

How can you specify multiple resource instances in data resources?

• Using the depends_on meta-argument

• Using the lifecycle block

• Using the provider meta-argument

• Using the count meta-argument

Answer explanation

Using the count meta-argument allows you to specify multiple resource instances in data resources.

What is the purpose of the postcondition block in data resources?

• To specify assumptions and guarantees about the data source

• To customize the lifecycle of data resources

• To ensure data sources access up-to-date information

• To check specific conditions about the data source

Answer explanation

The postcondition block in data resources is used to check specific conditions about the data source, ensuring that certain criteria are met before proceeding.

When are data instance arguments resolved in Terraform?

• During the apply phase

• During the destroy phase

• During the refresh phase

• During the planning phase

Answer explanation

Data instance arguments are resolved during the apply phase in Terraform, allowing the actual values to be used in the infrastructure deployment.

What is the purpose of the provider meta-argument in data blocks?

• To check specific conditions about the data source

• To specify assumptions and guarantees about the data source

• To customize the lifecycle of data resources

• To select a non-default provider configuration

Answer explanation

The purpose of the provider meta-argument in data blocks is to select a non-default provider configuration.