Given root words are voc, vok which means to call.
1) Convocation = the action of calling people for a large formal gathering or assembly.
There will be a convocation to celebrate those who passed the bar exam.
2) Invocation = the act of calling out to a higher power.
The baptismal ceremony will include an invocation.
I think the answer is true, but before you answer the question wait for someone else to answer besides me just to double check :)
I wish i had about $200 in my pocket