Google IT Support Professional Certification - Course 1: Technical Support Fundamentals, Complete Solution

Google IT Support Professional Certification - Course 1: Technical Support Fundamentals, Complete Solution Binary System The communication that a computer uses, also known as a base-2 numeral system Byte A group of 8 bits is referred to as a byte. Each byte can store one character, and we can have 256 possible values thanks to the base-2 system (2^8) Character encoding Assigns our binary values to characters, so that we as humans can read them UTF-8 Allows us to store a character in more than one byte Logic Gates Allow our transistors to do more complex tasks, like decide where to send electrical signals depending on logical conditions What is the highest decimal value you can represent with a byte 255 Abstraction To take a relatively complex system and simplify it for our own use Hardware Layer Made up of the physical components of a computer Operating System Allows hardware to communicate with the system Software Layer How we as humans interact with our computer User Interacts with the computer Ports Connection points that we can connect devices to that extend the functionality of our computer CPU Central Processing Unit. The brain of our computer, it does all the calculations and data processing RAM Random Access Memory. RAM is our computer's short term memory Hard Drive Holds all of our data, which includes all of our music, pictures, applications. Motherboard The body or circulatory system of the computer that connects all the pieces together. Programs Instructions that tell the computer what to do. External Data Bus How data travels through the computer. Registers They let us store the data that our cpu works with. Memory Controller Chip A bridge between the cpu and the ram. Address Bus Connects the cpu to the mcc. How does the CPU, the address bus, the memory controller chip, and the external data bus work together? The cpu asks, through the address bus, for data that it needs. The MCC looks for the data in RAM and sends it back over through the External Data Bus. What is the simplest way to describe the difference between cache and RAM? Getting something from RAM is like getting food out of a refridgerator, getting something from cache is like pulling food from your pocket; it stores recently or frequently used data. How many levels of cache in a CPU? Three levels: L1, L2, L3. Which is the smallest and fastest cache? L1. Clock Wire Computer sends a voltage to the clock wire to let the cpu know that it can start doing calculations. Clock Cycle When you send a voltage to a clock wire. Clock Speed The maximum number of clock cycles that it can handle in a certain time period. Gigahertz to cycles per second? For example, 3.4 GHz is 3.4 billion cycles per second. LGA There are pins that stick out of the motherboard, the cpu has holes. Pin Grid Array There are pins that stick out of the cpu, the motherboard has holes. What is the significance of 32 and 64 bit? They reference the cpu archiecture and state how much data they process efficiently. What is the difference between 32-bit and 64-bit versions of Windows? The terms 32-bit and 64-bit refer to the way a computer's processor handles information. The 64-bit of Windows handles large amounts of RAM more effectively than a 32-bit system. Volatile Once we power off our machines, the data stored in RAM is cleared DRAM Dynamic Random Access Memory. DIMM Dual Inline Memory Module. Have different size of pins on them. SDRAM Synchronous Dynamic Random Access Memory. DDR SDRAM