Web / Caddy Server Interview questions
What are the key features of Caddy?
Caddy's feature set is built around removing the manual setup steps that other web servers leave to the operator.
- Automatic HTTPS - certificates are requested, installed, and renewed without operator action.
- HTTP/1.1, HTTP/2, and HTTP/3 - QUIC-based HTTP/3 is supported natively.
- Caddyfile syntax - a concise, readable config language that compiles to JSON internally.
- Reverse proxy and load balancing - with active/passive health checks and multiple balancing policies.
- Single static binary - no separate runtime, package manager, or shared libraries required.
- Modular plugin system - extra capabilities (DNS providers, rate limiting, auth) are compiled in with
xcaddy. - Live config reloads - the admin API applies configuration changes without dropping connections.
Which protocol does Caddy support natively alongside HTTP/1.1 and HTTP/2?
Config changes can be applied to a running Caddy instance without downtime via its:
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