Which of the following are characteristics of an MTRJ fiber optic connector? $($Select two.$)$

answer

They must never be used with single$-$mode fiber optic cables.

They use a keyed bayonet.

They can be used with multi$-$mode fiber optic cables.

They use metal guide pins to ensure accurate alignment.

They're called push$-$in$-$and$-$twist connectors.