2. Hollerith s machine implemented what type of memory technology? a. Punched Cards b. Paper Tape c. Magnetic tape d. Relays

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1 Unit 1 Summary A Short History of the Computer 1. Who developed the very first computer of any type? a. Intel b. Apple c. Commodore d. The Chinese 2. Hollerith s machine implemented what type of memory technology? a. Punched Cards b. Paper Tape c. Magnetic tape d. Relays 3. The ENIAC computer was initially used for what purpose? a. Classified military projects just after World War I. b. To break the Enigma code system used by the German Army in World War II. c. Classified military projects just after World War II. d. To aid in tabulating the results of the 1940 U.S. Census. 4. The ENIAC featured what type of electrical devices? a. Transistors b. Microprocessors c. Mechanical levers d. Relays and vacuum tubes. The Language of the Computer 1. Is the telegraph a serial or parallel device? a. Serial b. Parallel c. Neither 2. Match the term on the left with its definition on the right. Some answers may not be used. Kilobyte Smallest unit of information Byte 8-bits Bit 16-bits on a computer Gigabyte 1024 bytes Megabyte 1000 bytes Terabyte 1,048,576 bytes Word 1,073,741,824 bytes 1,099,511,627,776 bytes

2 3. At their core, computers recognize only what number system? a. Hexadecimal b. Binary c. Serial d. ASCII Match the term on the left with the number system that term represents on the right. 245 Decimal 245H Binary 245F Hexadecimal ASCII F C3B0 The Computer Bus 1. A bus is a group of electrical conductors that run: a. in series. b. in parallel with each other. c. between houses. 2. Which of the following best describes a computer bus? a. A common path to transmit information to all parts of the computer. b. A parallel set of conductors connected to some devices in the computer. c. A single wire connected to all devices in the computer. d. The place in a computer where you attach peripheral devices. 3. A computer bus usually has how many conductors? a. 32 b. Four c. A multiple of eight. d. One for every device in the system 4. How many devices can use a single computer bus at the same time? a. One b. Two c. Three d. Divide the number of bus lines by eight.

3 Computer Components Several computer components are listed in the table below. For each component, determine which function it performs and fill-in the blanks in the table. Your choices include Processing, Input, Output, Input/Output, and Support. Component Stage Display Clock Power Supply Mouse Joystick Hard Drive Chipset CD-ROM Surge Suppressor Network Interface Card Microphone Plotter Scanner Floppy Drive Motherboard Speakers Modem UPS Memory Keyboard Tape Drive Printer Battery CD-RW CPU Support Components 1. CPUs are made up of: a. microprocessors. b. transistors. c. clock cycles. d. registers. 2. The fastest speed at which a CPU can operate is determined by its clock rate or clock speed. 3. The CPU clock provides what function? a. synchronize all activities b. maintain the calendar c. execute commands d. determines minimum CPU speed

4 4. Within a CPU, a transistor acts as a switch. The History of Processors 1. Which of the following play the largest role in determining CPU performance? a. CPU Voltage b. Speed c. Data bus size d. CPU model number 2. Which Processor first broke the 100MHz barrier? 80486DX2 Today s CPU Standard 1. What are the two main differences between the three Pentium CPU families? a. Clock speed b. Bus size c. Packaging d. Operating temperature 2. What was the maximum clock speed of the original Pentium CPU? a. 450 MHz b. 100 MHz c. 200 MHz d MHz 3. What was the maximum clock speed of the Pentium II CPU? a. 450 MHz b. 100 MHz c. 200 MHz d MHz Power and Connectors 1. A computer will use 175 watts while booting and 125 watts during normal operation. Which of the following power supply ratings would be the best choice? A. 125 W B. 170 W C. 200 W D. 450 W 2. Never replace a power supply with one having a (higher or lower) power rating.

5 3. The floppy drive gets its power through what type of connector? A. mini-connector B. Molex connector C. P8 D. 20-pin When Things Go Wrong 1. Lightning usually causes what immediate effect on power lines? a. sag b. brownout c. blackout d. spike 2. A lengthy decrease in line voltage is called: a. Surge b. brownout c. sag d. blackout 3. Surge suppressors are designed to protect devices from what problem? a. spike b. brownout c. sag d. voltage decrease 4. What device would you use to protect your computer from brief power outages? a. Batteries b. surge suppressor c. UPS d. FedEx 5. If a power supply fan won t run, how do you fix the problem? a. Replace the fan. b. Open the supply and see what s wrong. c. Replace the power supply. d. Drop the supply a few times on a hard surface and see if the fan starts turning. Static Electricity and the Computer 1. A spark from the discharge of static electricity is called: a. EDS b. ESD

6 c. EMI d. EMF 2. The damage caused by static electricity is a result of: a. the generation of the charges. b. the dissipation of the charges. c. the uncontrolled discharge of the static charges. d. low humidity. 3. Static charges are more easily generated in low -humidity conditions. 4. Which of the following statements is true regarding static electricity discharges? a. The damage is always immediate and obvious. b. They are safe and harmless if handled properly. c. They can be completely prevented by raising the humidity. d. A device may not show symptoms of failure right away. 5. Which of the following precautions is recommended to prevent the build-up of static charges? a. Maintain the relative humidity between 50% and 70%. b. Use a foil-lined bench and foil-lined storage bags. c. Always wear an anti-static wrist strap. d. Keep the computer chassis ungrounded to eliminate a path for static charges. Disassembling and Reassembling a Computer 1. The most important part of working in a computer is: a. disassembly. b. reassembly. c. preparation. d. documentation. 2. A computer technician needs: a. a huge set of tools, in order to perform any task. b. a few basic hand tools. c. a screwdriver, a hammer, and sandpaper. d. several diagnostic tools such as multimeters and oscilloscopes. 3. Software diagnostics are great when: a. the computer is completely dead. b. there is a problem with the display adapter. c. the floppy drive and CD-ROM are dead. d. the computer won t boot. e. the computer is running properly.

7 4. The best software diagnostics are based on what operating system? a. DOS. b. Windows 3. c. Windows 9x. d. a proprietary OS. 5. The best way to get a computer back together properly is: a. don t take it apart. b. use your digital camera to take photos of every step of disassembly. c. bring plenty of extra screws. d. document your disassembly steps.