Profile mapping sounds familiar, but I can't recall if it's specifically for displaying different content. I might be mixing it up with something else.
This question seems straightforward - the key is separating the hosts by processor type before enabling EVC. I'm confident I can identify the right answer.
Hmm, this is a tricky one. I think the answer might be B, using $push along with $each, $sort and $slice to limit the number of documents in an array field.
Chau
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