Question

example of body moving with uniform speed and uniform acceleration

Answer 1

a body moving with uniform speed has zero acceleration which is again uniform
so any body moving with uniform velocity will be a body moving with both uniform speed and uniform acceleration

Answer 2

IN uniform circular motion, the speed is fixed, the direction is constantly changing, therefore the velocity is changing. So we say it is accelerating. ... Yes, because its direction can change. For uniform circular motion, for example, the speed remainsconstant but the direction of motion changes continuously.