My OperaA+ Exam Cram 2 Memory
Sunday, April 8, 2012 5:05:02 AM
Capacitor
Bus
RAM, DRAM, SRAM, SDRAM, VRAM, RDRAM
DIP, SIMM, DIMM, RIMM
Concepts you will need to master:
Volatile versus nonvolatile memory
Megahertz (MHz) and nanoseconds (ns.)
Memory address
Synchronization to clock cycle (clock tick)
Memory module versus memory chip
Odd as well as parity checking
Computers use a lot of numerous microchips and processors, with maybe essentially the most familiar becoming the CPU along with the key memorywhat individuals frequently refer to as the computer's RAM. Memory is just a temporary place to store data until the CPU can get to it. This information and facts can be program instructions, data, or both. A typical instruction might possibly be a request to store a number or an occasion someplace. Yet another may be to retrieve that information from a specific placean address. Volatile memory can only hold knowledge when a usual electrical existing is present. Nonvolatile memory can hold specifics without having any electrical present.
CAUTION
Volatile, from the Latin "to fly," implies that info "flies away" when there's no electricity to keep it in spot. Tv reporters quite often refer to an explosive circumstance as a volatile situation, meaning that it could alter at any second. Nonvolatile memory, because it isn't volatile, stays the exact same without any need to have for electricity.
Conceptual Overview
Memory is relatively easy to understand, as soon as you have grasped the fundamental concepts. Within a nutshell, a CPU moves bits of data into registers (storage places inside a chip). Soon after it is dealt with these information bits to its satisfaction, the CPU functions together having a memory controller to move the results out to memory cells (storage locations on a memory chip). Each registers and memory cells have memory addresses, and each time a bit of data goes somewhere, it crosses a bus of some sort. For one of the most part, the history of memory development revolves around synchronizing these two subsystems.
NOTE
When we refer to speeding up memory, this frequently indicates growing either the actual speed in the chips or growing the clock speed of linked buses.
Memory involves a number of basic concepts, the very first of which can be a grid or matrix. As a result of this, we're going to put Table three.1 to a slightly several use, making it a sort of "mind map." In the event you can see the way the overall concepts break down on a grid, then possibly they will be simpler to recall.
NOTE
A matrix is nothing additional than an arrangement of columns and rows, like a spreadsheet or an Etch-a-Sketch. Columns go across the page, and rows go down the side. Cells going left to perfect (horizontally) have an X coordinate. Cells going up and down (vertically) have a Y coordinate. The direction of rows or columns is known as the axis. Combining both the X and Y coordinates offers us an address in the grid, like a cell address within a spreadsheet.
Table three.1 Mind map of fundamental memory ideas.
Data Storage C Nonvolatile
Disks Temporary swap files
ROM C Nonvolatile BIOS
RAM C Volatile
Forms of RAM
Types of Packaging
Major Memory
DRAM
DIP
SRAM
SIMM
SDRAM
70-680, mcitp exams, comptia a practice exams
Bus
RAM, DRAM, SRAM, SDRAM, VRAM, RDRAM
DIP, SIMM, DIMM, RIMM
Concepts you will need to master:
Volatile versus nonvolatile memory
Megahertz (MHz) and nanoseconds (ns.)
Memory address
Synchronization to clock cycle (clock tick)
Memory module versus memory chip
Odd as well as parity checking
Computers use a lot of numerous microchips and processors, with maybe essentially the most familiar becoming the CPU along with the key memorywhat individuals frequently refer to as the computer's RAM. Memory is just a temporary place to store data until the CPU can get to it. This information and facts can be program instructions, data, or both. A typical instruction might possibly be a request to store a number or an occasion someplace. Yet another may be to retrieve that information from a specific placean address. Volatile memory can only hold knowledge when a usual electrical existing is present. Nonvolatile memory can hold specifics without having any electrical present.
CAUTION
Volatile, from the Latin "to fly," implies that info "flies away" when there's no electricity to keep it in spot. Tv reporters quite often refer to an explosive circumstance as a volatile situation, meaning that it could alter at any second. Nonvolatile memory, because it isn't volatile, stays the exact same without any need to have for electricity.
Conceptual Overview
Memory is relatively easy to understand, as soon as you have grasped the fundamental concepts. Within a nutshell, a CPU moves bits of data into registers (storage places inside a chip). Soon after it is dealt with these information bits to its satisfaction, the CPU functions together having a memory controller to move the results out to memory cells (storage locations on a memory chip). Each registers and memory cells have memory addresses, and each time a bit of data goes somewhere, it crosses a bus of some sort. For one of the most part, the history of memory development revolves around synchronizing these two subsystems.
NOTE
When we refer to speeding up memory, this frequently indicates growing either the actual speed in the chips or growing the clock speed of linked buses.
Memory involves a number of basic concepts, the very first of which can be a grid or matrix. As a result of this, we're going to put Table three.1 to a slightly several use, making it a sort of "mind map." In the event you can see the way the overall concepts break down on a grid, then possibly they will be simpler to recall.
NOTE
A matrix is nothing additional than an arrangement of columns and rows, like a spreadsheet or an Etch-a-Sketch. Columns go across the page, and rows go down the side. Cells going left to perfect (horizontally) have an X coordinate. Cells going up and down (vertically) have a Y coordinate. The direction of rows or columns is known as the axis. Combining both the X and Y coordinates offers us an address in the grid, like a cell address within a spreadsheet.
Table three.1 Mind map of fundamental memory ideas.
Data Storage C Nonvolatile
Disks Temporary swap files
ROM C Nonvolatile BIOS
RAM C Volatile
Forms of RAM
Types of Packaging
Major Memory
DRAM
DIP
SRAM
SIMM
SDRAM
70-680, mcitp exams, comptia a practice exams
