Fair: Answer with a noun, "I am a computer programmer."
Good: Answer with a verb, "I program computers."
Better: Answer with a verb for myself and a noun for the result, "I program web applications."
Even Better: Answer with a verb for myself, a noun for the result, and another noun for my customer, "I program web applications for doctors."
Best: Answer with a verb for myself, a noun for the result, another noun for my customer, and another noun to describe my customers' benefits, "I program web applications that help doctors give better care to their patients."