Subtitles of the Movie

Let's take a look at ah, two or three sample test questions about RAM. First of all, James adds a 512 megabyte stick of RAM to a computer, but on start up he notices that the memory isn't detected. What's wrong? Well, let's look at our choices here: A. My settings need to be updated? Probably not. The RAM needs to be ECC. Ah, that's not going to be it. If the RAM needs to be ECC then we simply wouldn't have that functionality, that would be assuming that the MCC on the motherboard is correct, and it does ECC and so forth. C. The RAM isn't seated properly. This is most likely the cause, and D, all the above, that obviously is not right. The most likely thing here is that he snapped the RAM into place, but it wasn't seated properly, or maybe it's not all the way down on one side, and so the machine is just not recognizing it. Now, James, ah James is having a tough time, isn't he? James added another 1-gigabyte stick of RAM to his laptop, but it still only recognizes 1 gigabyte of memory, so obviously, he had a gig in there and he's added another 1 gigabyte stick, okay. What's wrong? And this is a common problem out there that I see, especially in the corporate world. Ah, A. He hadn't installed the service pack. Ah, that's ah, a cause of a lot of problems, but unfortunately ah not a RAM problem. Ah, The RAM is buffered. Ah, no. C. It'll detect it later, ah, you know a couple of days later it will pick it up. No, that's not going to happen. If it doesn't see it it's not going to see it. Now there's something interesting here, an aside here, occasionally you will see RAM that's detected some days and then not detected other days, and that's, that's bad RAM is what that is and it's intermittently working and you want to get that out of there quick, it's going to cause some major problems. Next, ah, His computer can't use that much memory. That is most likely the answer, and one of the things you want to watch for, just because I've got 2 one gigabyte sticks doesn't mean my computer can use that much, and depending on the age of your computer, you, ah, one gig may be your max. I've got a laptop right now that will only take 1 gigabyte of memory. So, even though there's two slots, the, the max I can put is two 512 megabyte ah sticks in there. I can put two 1-gig sticks, but I'm only going to get 1-gig, so I can save my three-four hundred bucks, and just ah get by with one. So, anyway, the user can't use that much memory. Do one more here. Which of the following is the best definition of latency? And that is, A. The time it takes to respond to a request; B. The speed of the RAM; C. I like these two: Distance between the MCC and the ECC; or D. Distance between the ECC and the CPU. Now, they'll do this on the exam and I put this example on there because they will do this to try to throw you off. If I really don't know what the answer is here, and obviously it's A., right? The time it takes to respond to a request. But if I don't really know I might assume, You know what, they've got distance between MCC and ECC and distance between ECC and CPU. It must be one of these, right, because they've thrown a little difference in here and so I've got to figure out which one of these it is. And I hope that makes sense to you. Be real careful when you see these. Ah, this may be a tactic in there to throw you off and divert you from the correct answer up here, but again their purpose is to try to see if you know the correct answer, and so obviously it is A, the time it takes to respond to a request. So, again, my advice for you on RAM, read over some information. You just have to Google, you don't have to buy anything, just read over some information about the various aspects of RAM and remember you want to match speed, type of RAM, and you want to, er, ah, revert to that motherboard manual and make sure that you're not using a wrong type speed, that sort of thing, and that you're matching them if you have to and all that stuff. So, again, just a quick sample of questions that you're likely to see on the exam.