Join Mike Meyers for an in-depth discussion in this video What is the BIOS?, part of CompTIA A+ Exam Prep (220-901) Part 1: Core Processing.
- Ladies and gentlemen,…I present to you a typical motherboard.…Now, if you take a look at this motherboard,…the motherboard is really an assumption.…The motherboard assumes that you're going to be using…a lot of peripherals for your computer.…It assumes it so well that it actually…even makes connections for them.…They assume you're gonna use video,…they assume you're gonna use keyboard,…they assume you're gonna use a mouse.…There's connectors on here for hard drives…which they assume you're going to use.…Now, these are pretty safe assumptions, don't get me wrong,…but the bottom line is that you've got…all of these peripherals.…
Now, when a connection comes in,…let's pick on the keyboard for a minute,…so we plug the keyboard into this little PS2 connector,…so when you press down the letter J on the keyboard,…a scan code goes though the keyboard itself,…goes through the cabling,…goes into here,…and then it's stored on a chip.…Now the computer needs to have some way to query that chip,…which we call the keyboard controller,…
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.
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- 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