By Ron Gilster
Prepping for the A+ certification examination isn't a simple problem, yet for you to develop into a qualified desktop technician, passing this try out is a demand. the good news is you simply need to take it as soon as on your lifestyles to turn into certified.A+ Certification For Dummies third version is a no-nonsense, easy-to-use reference and research consultant for the A+ middle examination and the OS applied sciences examination! It specializes in every thing you must recognize to cross those exams, offering historical past info that will help you comprehend the various extra advanced ideas and applied sciences. You’ll have a deal with on the entire matters, including:The anatomy of a computerBuilding and deconstructing a PCMaintaining a computerOperating platforms basicsProfiles of home windows ninety five, ninety eight, Me, 2000, and XPMaking community connectionsWorking with the networkSharing the internetThe bonus CD-ROM positive factors specific test-prep software program with two times as many pattern questions than the former versions of this booklet, plus demo models of Boson software program, Inc., JRK software program, Vista-Net Publishing, and Self try software program. Now extended to incorporate the 2003 model of the examination, this is often the fun-and-easy option to learn for the examination, with all of the rewards in part the time!
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Additional resources for A+ Certification for Dummies, 3rd edition
Lab 2-2: Converting Hexadecimal to Decimal Because each position represents a power of 16, the A in A012F represents the positional value of 164 (as was the case in Lab 2-1, powers of the radix increase from 0 starting with the rightmost position). The A has the decimal equivalent of 10. So, this position is worth 10 * 164, or 655,360 (trust me on this). The next position of value is a 1 in the position of 162, which is worth 256. The 0 in the 163 position has no value. The next position has a value of 2 * 161, or 32.
Hexadecimal numbers are usually written with a small h at their end to indicate that a number is being expressed in hexadecimal form. Hexadecimal numbers are far easier to convert with a calculator, but knowing how to convert them can be handy when taking an A+ exam. Basic Electronics and Number Systems Prep Test The decimal equivalent of 00000110 is 8 5 110 6 The number A06F is most likely from which numbering system? Decimal Binary Hexadecimal Octal Electrical current is measured in Amps Ohms Volts Watts What is the most common threat to PC hardware when being serviced by a technician?
B. Household appliances operate on alternating current, but the computer operates on direct current. The power supply converts AC to DC. ” C. A00h is the same as 10 * 256 (162), or 2,560. ” B. It doesn’t take very much of an ESD charge to zap the internal components of a computer. ” B. ESD is the abbreviation for either electrical static discharge or electrostatic discharge; both terms are used interchangeably. ” Part II: Inside the Box Chapter List Chapter 3: The Motherboard Chapter 4: BIOS Chapter 5: Bus Structures Chapter 6: Microprocessors Chapter 7: Memory Systems Chapter 8: Storing Data Chapter 9: Powering and Cooling the PC In this part .
A+ Certification for Dummies, 3rd edition by Ron Gilster