Right, but if he volunteered at the draft board then he would bypass the exemption for fathers. Alternately if his kids were born after the war started the exemption did not apply.
Yes, if the local draft board took him. There was considerable discretion at the local level, as long as the basic guidelines were followed. Also, each board had a quota to fill. If they were considerably short of filling their quota, they became tighter with exemptions, and vice versa.