"Softball questions" refers to easy or favorable questions that are asked to someone in a conversation or interview, which allows the person to answer comfortably without being challenged. Full definition
She teaches us so much — like how to lob softball questions at clearly insane celebrity guests, and how to turn insufferable megalomania into a billion - dollar empire. (canadianbusiness.com)
Witness Barrack Obamas visit to China in November which saw him apologize for the weakening American dollar and answer softball questions from government - picked students in Shanghai. (canadianbusiness.com)
The listeners who called in lobbed softball questions at him about the benefits of the sugar tax, the perils of hydrofracking and the utility of new voting machines. (nystateofpolitics.com)