# Which Problems Are Solved
- The `io/ioutil` package was deprecated in Go 1.16.
- Reference: https://go.dev/doc/go1.16#ioutil
# How the Problems Are Solved
- Replaced deprecated functions with their recommended alternatives:
- `ioutil.ReadFile` → `os.ReadFile`
- `ioutil.ReadAll` → `io.ReadAll`
- `ioutil.NopCloser` → `io.NopCloser`