The lockdown is every word that true to its literal meaning during that period of time. People are not allowed to leave their own apartment. It is more like national level home arrest than volunteered quarantine.
All policies are enforced through each individual district, roughly equals to each apartment complex, that entering or leaving the complex requires its own passes. Let alone make a mask a requirement for everyone, without which you would put arrested in public.
I don't think any other countries can implement such a strict lockdown really. In California's case, I think the spread will no doubt slow down, but it is not going to be enough to burn out the virus. In the meantime, we need an effective treatment to be deploy to really battle this.
Can't believe this timeline is getting so intense this quickly in 2020, this is history making by everyday...