Question

the velocity of an object at rest is considered to be uniform

Answer 1

No it is stationary, it is at rest and no external force is applied
An object can only be uniform if it is motion but according to the question, it is not in motion

Answer 2

1) THE VELOCITY OF AN OBJECT IS SAID TO BE IN UNIFORM MOTION WHEN IT'S SPEED IS CONSTANT ALL THE TIME. 2) FOR AN OBJECT AT REST,IT'S SPEED IS ZERO ALL THE TIME. 3) THEREFORE, THE VELOCITY OF AN OBJECT AT REST CAN BE CONSIDERED TO BE UNIFORM