- In the early days of the United States,…when we would have trappers would who go out…and they would catch beaver and all that…different type of stuff,…what they would do is they would take…small supplies of stores,…food, blankets, things like that,…and they would bury them in little tucked away places…just in case they were needed.…And these were known as a cache.…In the CPU world,…cache works in a very, very similar way.…It takes a little bit of what we need,…and puts it in a place closer to us…in case we need it.…
But in order to understand cache,…let's take a moment and appreciate…the processing steps one more time.…So, what I have in front of me here…is a hard drive, some RAM, and a CPU.…Programs, by default, live on your hard drive.…When your computer's turned off,…that's where the programs live.…When you fire your computer up,…your programs are still on here,…unless you call to them.…So, when you double click on Microsoft Word,…or whatever it might be,…what actually takes place is some of that program,…not all of it, but some of it…
The CompTIA A+ 220-901 exam is comprised of six key parts. The first, core processing, is covered by this course. Instructor Mike Meyers explains the fundamentals of PCs, microprocessors, RAM, and BIOS. He also shows you how to set up, connect, maintain, and troubleshoot the main components of a computer.
Note: The six courses designed for the CompTIA A+ (220-901) exam preparation include core processing, core hardware, peripherals and building a PC, displays and printers, networking, and laptops and mobile devices.
We are a CompTIA Content Publishing Partner. As such, we are able to offer CompTIA exam vouchers at a 10% discount. For more information on how to obtain this discount, please download these PDF instructions.
- How do personal computers (PCs) work?
- What is a central processing unit (CPU)?
- When is random access memory (RAM) used?
- What is a basic input/output system (BIOS)?
- Installing a CPU
- Working with extensions and sockets
- Troubleshooting RAM
- Setting up a BIOS