Corporate Credit Cards?

Yes you’ll get a corporate card that you’ll use to expense dinners, ubers, flights, etc. HR will talk about and run the new analyst class on best practices. Each bank does things slightly differently but they’ll give you the rundown during training

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Most banks permit analysts and above to get a corporate credit card/corporate AmEx. Personally, I find it more annoying to use it and prefer to put things on a personal spending card to capture points benefits and just get reimbursements, but everyone's different. If you're looking for a personal card, Chase Sapphire Reserve (better than Preferred) is probably the most common. Chase was giving huge bonus perks on it that netted out to like 7+ years of essentially no cost to the card (if I remember correctly) but they've since cut that in half... regardless, still a great card with awesome perks/benefits. 

Most analysts get cards. You could also put the charges on your own card and get reimbursed, but then you have to file expenses. My bank actually gives administrative assistants to analysts for calendar management and expenses etc. So that person will collect receipts and log them. As to which cc to get, I would get one that gives high rewards for restaurants. Lots of people will tell you to get the chase or amex travel cards because those have status attached to them, but unless you're traveling a lot, you'll earn more points with something that gives highest rewards on restaurants.