Answer to Question 1
One exception might be employees who do the same task day after day and whose skills remain constant, like long-term factory workers. Motivation may or may not vary in this scenario. The SLII might be hard to implement when a leader has many subordinates. It may also be less useful than other leadership approaches in a small office where employees have worked together for years and have routinized jobs. Since the tasks and employees are the same, there's not much need to adapt one's leadership style, as long as it's already effective.
Answer to Question 2
False