Yes, it is possible for an object's speed and/or acceleration to be zero while its direction changes. This scenario occurs when an object undergoes a change in direction without changing its speed or experiencing any acceleration.
Consider the example of a car moving along a circular track at a constant speed. As the car moves along the curved path, its velocity vector is constantly changing because velocity is a vector quantity that includes both speed and direction. At any given point on the track, the car's speed and acceleration may be zero, indicating that it is not speeding up or slowing down. However, since the car is moving along a curved path, its direction is changing continuously.
This situation demonstrates that an object can change its direction without experiencing any change in speed or acceleration.