Okay, I see the key points - the system has two peak usage periods that are critical, and the normal usage can be handled by fewer servers. I think I have a good idea of how to optimize the solution.
This looks like a tricky question about the order of ContentHandler methods when parsing an XML document using a non-validating SAX parser. I'll need to carefully consider the line feeds and structure of the given XML document.
Okay, I've got this. The question is asking us to ensure that visitors are serviced by the same web server for each request, so we need to configure session persistence. The answer is D, Client IP, since that will route the same client to the same web server.
Hmm, I'm a bit confused on this one. I know IR illuminators use infrared wavelengths, but I'm not sure which specific ones wouldn't be visible. I'll have to think this through carefully.
I remember practicing a question about unchecked return values before. It feels like it could be relevant, especially if the code isn't handling errors properly.
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