Hi friends....... Actually i faced this questions in SEO interview plz tell me something about Yahoo Answers.
Yahoo answers is great for traffic but backlinks are no follow so it wont help your pr.... As to how make a post sharing your resource as the asnwer. Is that really what your asking....
For getting traffic from yahoo answers...you need to find questions in relevant categories to the project you are working on and than answers these questions by referring your website. You can paste your website link and thats the way you will get the traffic.
you need to have an account that is level2. this way you can post clickable links to your answers. thus you receive traffic.
No follow so useless in terms of engine ranking but yes, if the page is ranked and gets good traffic than you're good to go.
yahoo answer provide the different type of category which you want to select that then if you want to give a suggestion on any topic.user can put the link of his site. then traffic will generate.