ACan some of you please tell me how long it take you to decorate a cake with buttercream, no fondant. Cake must all be done in frosting, borders, roses and all that goes along with it, 1/2 sheet cake, 9 inch x 4 round...

This is going to very all over the place depending on how long and how 'good' a decorator is.  The more experienced person could do what you describe in about 30 to 60 minutes whereas a person starting out or even after a couple of years might take up to 1 1/2 hrs.

You have to set your own pace.  The faster you go, the more likely it is to make mistakes - like leave out a letter when writing a message! :)

AI re-posted this response because I don't know if it shows up on both pages so ignore if you already read my response!

No baking, torting, filling, covering ... The roses are actually royal. The reason I'm asking is I interviewed with a local market and they had me do a couple of dummy's in royal icing, including making the icing. Basically they said here's the kitchen, do it. They didn't show me around or anything, I had to bring my own equipment, except the mixer but including colors, tips, scale, spatulas...things you would think they would have. It took me a while to unload my car and organize myself, there was no one there to ask questions to or help out in any way. I ended up covering the cakes in fondant, royal is just to difficult to cover with, the fondant they had was pre-rolled and to small to cover the cakes. I had to use several pieces of the fondant, cut off all the dried up edges, warm it up, knead and re-roll it. It ended up taking me a few hours including cleaning their kitchen. The owner ended up telling me I was slow and would have to learn to do "many, many, many cakes within 2 hours time", she mentioned dozens of cakes latter in the conversation! I know it took me longer than usual because of the situation and I told her so but come on, if it was even 6 cakes an hour that's 10 minutes a cake. The kicker was she said the job would be minimum wage until I picked up my speed to what she wanted. I just graduated from pastry arts school and just began getting my résumé out and I'm hoping this is not typical! I also spent a couple of days with them in the market getting familiar with the retail part helping with some salads and doing various things all for free, part of a working interview. Feels more like free help for the Holiday weekend and they now have 2 dummy's to display.

In my opinion I think it is a shame they didn't give you more instruction/guidance...in my opinion, they set you up for failure.  I would never want to work in a place like that.  I used to work at a bakery where they just threw the front people out to the wolves.  I can ice and decorate a simple BC cake with roses in probably 15 minutes...if I was being "timed"...I do not work that way at home.