While a yes or no response doesn't create an essay or thesis, the statement "Working hard for things makes you appreciate them more because you have to sacrifice, focus and overcome obstacles to get them," is a thesis statement.
A diagnostic paragraph example would include writing based on each of the three reasons keeping your essay thesis as a focus.
That simple response is not a thesis; answering yes or no to an essay prompt question is not the basis of diagnostic writing.
In the example, three reasons hard work is valuable might be: sacrificing, focusing and overcoming obstacles.
When asking you to write a diagnostic essay, professors aim to see how competent you are in terms of essay writing and what is your background knowledge.
Thus, they can provide some professional guidance for you to easily refine any college assignments in the future.
They are very common in standard exams like the SAT.
Students are expected to time themselves and use proper prewriting skills.
By reading the prompt, students take the first step in fully understanding what the question is asking. If students misread or misinterpret the prompt, the thesis and essay will not match with the prompt's intent.
Even though each essay will be individualized in interpretation and writing skills, the prompt is what guides the thesis and the essay itself.