What is the weather like?
My first question: After looking up in the dictionary, I found that "like" can be used as a preposition, an adverb, a verb. In the above sentence, I think "like" functioning as a preposition is used to ask somebody’s opinion of somebody/something(http://www.oxfordlearnersdictionaries.com/definition/english/like_1?q=like%3F). Am I right?
My second question: I think the word "like" in "What is the weather like?" and "what is she like?" mean the same? Am I right?