CompTIA A+ Essentials

What’s inside

• Which component converts AC power from a wall outlet into the DC voltages used by a desktop computer?
• A device driver allows an operating system to communicate with a specific hardware device.
• Which motherboard component stores firmware instructions used to start the computer before the operating system loads?
• Installing more RAM always increases a computer's performance, even when the operating system and applications are not…
• Which interface was commonly used to connect older parallel ATA hard drives and optical drives?
• A laser printer uses toner rather than liquid ink to form printed images.
• Which Windows startup option loads only essential drivers and services to help isolate software problems?
• A Class C IPv4 network using the default subnet mask can provide 254 usable host addresses.