I think I know the answer to this one. The redirection is overwriting the file before sed can read it, so the output is empty. I'll double-check my understanding.
I'm not entirely sure about this one. I think creating a disk group and creating a database service might be the right answers, but I'm not 100% confident. I'll need to double-check my understanding.
This seems similar to the practice question we did where a shareholder sold their stock. I think I recall that the gain is calculated by subtracting the basis from the sales price.
Hyman
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