The Kodak Pixpro AZ421 has a better sensor type than most cameras of this spec and age. This camera has a CCD sensor type, whereas most cameras of a similar age and type to it have a MOS sensor type. CCD sensors produce high quality, low-noise images but consume a lot more power than CMOS sensors. CCD is the most common image sensor type used in digital cameras.
A CCD sensor type is in fact the best sensor type across all similar spec cameras that came out around the same time as the Pixpro AZ421.
The worst sensor type across comparable types of digital camera is MOS.