Rotors/pads (new) - squeak

What is your question?

Greetings folks, I recently had rotors and brake pads replaced on my 2007 Camry (front pads/rotors and read pads/rotors). It was done last week and she is braking fine. But sometimes now when I brake there's a low-medium squeaking sound from the brakes. Is this normal / what's the likely cause? Thanks!