What are mandatory overs in test cricket?

Answer 1

The Bowling team is required to bowl a mandatory minimum of 90 overs in a day. They can bowl more but very rarely do. Usually they have to go into overtime to fulfil the requirement.

Answer 2

There are no specified overs in a test match. It is usually 5 days of cricket with around 90 overs bowled on each day. Things like rain delay, bowling team bowling slow etc can affect the number of overs bowled in a test match.