The lender providing the cash advance may have lending policies that won't allow a cash advance in bankruptcy, but others may not. Any debt incurred while in bankruptcy is not included in the bankruptcy. Given that debt is a problem in bankruptcy, those who file are expected to avoid additional debt while filing.
If you're in bankruptcy (i. e. , after you filed but before your discharge), you are free to get a cash advance as far as the court is concerned. Of course, obtaining one will be difficult, since the bankruptcy filing will appear on your credit report.
You can get a cash advance or even a car if you are in a bankruptcy. However, the interest rate will be really high and many of the major cash advance will deny you depending on the length of time of your bankruptcy. I would just borrow the money from a friend or a family member.
Most likely not. It will show on your credit report that you are bankrupt and most agencies will not lend money to anyone who is in bankruptcy without a cosigner.