How to distinguish between subjective shots and objective shots in movies?

Subjective shot: A shot that represents the viewpoint of a character in a movie. When the character scans or walks in the scene, the camera represents the eyes of the character and displays what the character sees. For example, in the movie Titanic, when Jack first came to first class, the camera looked around the grand staircase from his perspective, or when the Titanic sank, the camera sank with its owner.

Objective lens: the lens experiment has no obvious director's subjective color, nor does it adopt the viewpoint of the characters in the play, but adopts the viewpoint of ordinary people to see things. This kind of lens is generally called "objective lens". It presents things to the audience as objectively as possible. In general movies, most shots are objective shots.