His confidence is a reflection of his "Self-efficacy".
Self-efficacy is characterized as an individual judgment of "how well one can execute strategies required to manage planned situations". Expectations of Self-efficacy decide if an individual will have the capacity to show adapting conduct and to what extent exertion will be supported despite obstacles. Individuals who have high Self-efficacy will apply adequate exertion that, if first rate, prompts effective results, though those with low Self-efficacy are probably going to stop exertion early and fail.