Site reliability engineering (SRE) is Google's way of performing IT operations

Which TWO of the following in regards to SRE practice at Google are TRUE?

1. The SRE team is capped at 50% of their time performing toil work.

2. The SRE team is focused on manual intervention versus engineering

3. SRE learns scale linearly with the service sue

4. SRE teams modernize the traditional IT Ops role