How do feature flags enable safer deployments?

How do feature flags enable safer deployments?

• A. They delete old features automatically
• B. They require a full redeploy for changes
• C. They enforce stricter access control
• D. They allow enabling/disabling features at runtime without redeploying

Answer: (D)

Feature flags let you turn features on or off at runtime instead of rebuilding and redeploying code. That means a feature can be released in the codebase but kept hidden or disabled until you choose to enable it for all users or a specific group. If something goes wrong after enabling, you can flip the flag back off immediately, without touching the code or going through another deployment. This approach supports safer deployments through gradual rollout, quick rollback, and easier experimentation with different user segments. The other ideas don’t capture this runtime control: flags don’t delete code, they don’t require a full redeploy, and they aren’t primarily about stricter access control.

Feature flags let you turn features on or off at runtime instead of rebuilding and redeploying code. That means a feature can be released in the codebase but kept hidden or disabled until you choose to enable it for all users or a specific group. If something goes wrong after enabling, you can flip the flag back off immediately, without touching the code or going through another deployment. This approach supports safer deployments through gradual rollout, quick rollback, and easier experimentation with different user segments. The other ideas don’t capture this runtime control: flags don’t delete code, they don’t require a full redeploy, and they aren’t primarily about stricter access control.