in my Org, I can't see a sharing button in my Custom object record, but I can see it enabled in page layout.Can you please tell me how to enable this one? 

And I can see a sharing button on my account object, and share a record.

Hi,

In a master-child relationship between a standard object and custom object. Which of the following statements in NOT true.

Please select two items.

a) Standard object is always master

b) Custom object is always master

c) Custom object is always child

d) Standard and Custom object can be a master

e) Standard object is never a child

Which two options can be selected for this question?

Thanks and Regards,

Devendra S