For the A+ Certification exams, you should be able to identify the names, functions, and characteristics of the major components and ports of a Pc.

Transcription

1 Introduction For the A+ Certification exams, you should be able to identify the names, functions, and characteristics of the major components and ports of a Pc. Practice 1.1 Fill in the blanks for the statements about analog and digital. The following terms may be used more than once. analog digital 1. The switch in illustration A best represents a(n) 1. electronics system. 2. The switch in illustration B best represents a(n) 2. electronics system. 3. A(n) electronics system uses varied voltage signals A(n) electronics system uses signals of full voltage or 4. no voltage. Off = 0 & On= 1 ;1 ~ A Off iilr 1/3 power ;' 6 cj h B Copyright by Goodheart-Willcox Co., Inc. 9

2 Practice 1.2 Identify the following as relating to ASCII, binary, or hex. The following terms may be used more than once. ASCII binary hex 1. Number base 16 system. 2. Pattern of ones and zeros. 3. IF (represents 31 in decimal). 4. Number base 2 system. 5. Represents computer character codes Practice 1.3 Label the following units of data. bit byte word A. I B. I T' I C Practice 1.4 Match the computer terms to their definitions. Not all of the definitions will be used. 1. anti-static wrist strap a. To plug in or unplug a device while the PC is running. 2. computer b. Drive bay designed to accommodate the easy hot 3. device bay swap of devices such as hard disk drives, tape drives, CD-RW drives, and DVD drives. 4. electrostatic discharge (ESD) c. Collection of transistors, resistors, and other electronic 5. hot swap components reduced to an unbelievable small size. 6. integrated circuit (IC) d. Strap, typically worn around the wrist, that connects 7. peripherals the technician to ground and bleeds off any electrostatic charge. e. Assemblage of electronic modules that interact with software to create, modify, transmit, store, and display data.. Optional equipment used to input or output data. g. Release of energy (electrical current), created when an object with an electrostatic charge makes contact with a conductor. h. A circuit board covered by a maze of conductors which provide electrical current to the computer. 10 Computer Service and Repair Study Guide Copyright by Goodheart-Willcox Co., Inc.

3 Name Practice 1.5 Fill in the blanks for the statements about computer numerical values. Not all of the terms will be used. exabyte kilobyte petabyte gigabyte megabyte terabyte bytes of RAM is approximately equal to ,099,511,627,776 bytes of RAM is approximately equal to ,048,576 bytes of RAM is approximately equal to ,073,741,824 bytes of RAM is approximately equal to ,152,921,504,606,846,976 bytes of RAM is approximately 5. equal to 1. Practice 1.6 Label the major computer parts. Not all of the terms will be used. llasic input/output central processing hard drive power supply system (BIOS) unit (CPU) heat sink with RAM battery expansion card cooling fan expansion card slot motherboard D. E. F. C c. H. Copyright by Goodheart-Willcox Co., Inc. Chapter 1 Introduction to a Typical PC 11

4 Practice 1.7 Match the name of the computer component to its definition. Not all of the definitions will be used. 1. basic input/output system a. The brain of the computer, which performs functions (BIOS) such as carrying out program code, translating 2. battery commands into actions, and performing calculations. 3. central processing unit (CPU) b. A volatile memory system into which programs are loaded. 4. complementary metal oxide semiconductor (CMOS) c. A board that can be easily installed in a computer to enhance or expand its capabilities. 5. cooling fan d. The chip that stores the BIOS setup program data. 6. expansion card e. A circuit board covered by a maze of conductors 7. expansion card slot which provides electrical current to the computer 8. hard drive components and expansion slots. 9. motherboard f. The component that supplies voltage to the CMOS chip. 10. RAM g. A fan that supplies a constant stream of air across the computer components. h. Special firmware that permits the compatibility between the CPU and devices such as the hard drive, CD-ROM drive, and monitor. 1. Converts 120 Vac input to a much lower dc output required by the computer components. J. Receptacle for expansion cards which allows them to connect to the motherboard's circuitry. k. A magnetic storage media consisting of a set of magnetic disks and read/write heads housed inside a hard case. ~ Practice 1.8 Identify the computer ports. audio out keyboard mouse RJ-45 FireWire microphone parallel serial headphones monitor (HD-15) RJ-ll USB A L K I k ~~ _ ~~------~ ''f? B C D E F G H A. E. 1. B. F. J. C. e. K. H. D. L. 12 Computer Service and Repair Study Guide Copyright by Goodheart-Willcox Co., Inc.

5 Practice 1.9 Label the tools. Name anti-static wrist strap flat tip screwdriver star driver chip puller Phillips screwdriver Torx driver A. B. c. D. E. F. Copyright by Goodheart-Willcox Co., Inc. Chapter 1 Introduction to a Typical PC 13

6 Chapter 1 Review Introduction to a Typical PC Name Period Date Score Write your answers in the spaces provided at the end of the question. For fill-in-the-blank questions, provide the word or words needed to complete the sentence. 1. Give three examples of computer data. 2. How is data represented inside the computer? 3. Data represented as electrical pulses are changed to patterns when stored on a floppy disk. 4. What two numbers are used to represent data in a computer system or storage device? 5. What are the two categories of electronic components? 6. A dimmer switch best represents which category of electronic device? 7. A simple on/off switch best represents which category of electronic device? 8. What is the name of the number system used to represent digital electronics? 9. What number system is composed of only one and zero? 10. How is Morse code similar to computer technology? 11. What number system uses sixteen characters, 0 9 and A F? 12. The brain of a computer is called the, or CPU. 13. The power supply converts ac to. 14. Computer data and programs are generally stored on the PC s. Continued Copyright by Goodheart-Willcox Co., Inc. Permission granted to reproduce for educational use only Chapter 1 Introduction to a Typical PC 37

7 Name 15. The volatile memory system inside a PC case is referred to as and is represented by the three-letter acronym. 16. A permanent form of memory is called and is represented by the three-letter acronym. 17. BIOS is a form of memory. 18. The BIOS supports communication between the and the computer s. 19. The BIOS stores information about the hardware in the. 20. A(n) is used to retain data in the CMOS after the computer s electrical power is switched off. 21. PCI is an example of what? 22. What is the name and acronym of the test performed by BIOS when a computer is turned on? 23. A single binary digit is called, and a collection of eight binary digits are called a(n). 24. A(n) is the total amount of data (in bits or bytes) that a computer can process at one time. 25. When writing down memory usage, are represented by the letter b, and are represented by the letter B. 26. What is the decimal equivalent to the hexadecimal letter F? 27. The first standardized computer symbol code is called and is represented by the acronym. 28. transfer sends data one bit at a time while transfer sends data in many bits simultaneously. 29. What devices allow computers to communicate over telephone lines? 30. Based on the number base 2, how many actual bytes are there in one kilobyte? 31. What is the technical term for a chip? 32. What is a common source of IC damage? 33. How can ESD be prevented? 34. What generally produces static? 35. Why should a PC technician avoid using magnetic screwdrivers or extraction tools? 38 Computer Service and Repair Instructor s Manual Copyright by Goodheart-Willcox Co., Inc. Permission granted to reproduce for educational use only