When company does background/credit check for a job, does it actually show the entire credit report

The company I used to work for did both background checks and credit checks. It really depends on what the company wants to look at. A background check will show things like felonies or misdemeanors, where a credit check shows your credit for the last 7 years.

For new job employment, a credit history or credit report is a record of an individual's past borrowing and repaying, including information about late payments and bankruptcy. In the U.S., a consumer's credit history is compiled by consumer reporting agencies or credit bureaus.