This is quoted from the CIC/IRCC's website. Check the link for further details.
"The officer will ask you a few questions to make sure you still meet the terms to immigrate to Canada. They will be similar to the ones you answered when you applied. This should only take a few minutes."
At the time of landing, an applicant has to satisfy the officer that s/he has enough funds/means of financial support for him/herself and his/her family. Whether all officers ask/check these details is not a question, applicants are required to carry all these documents with them when they appear for landing.
I was being ironic due to the other posts in this thread...