Why do we use USB ports today instead of serial and parallel ports on older comp

Question

Why do we use USB ports today instead of serial and parallel ports on older computers? Which measurement goes with which device? Term may be used more than once. What does ROM mean? Which of the following statements is incorrect? The power supply on a computer houses the main fan. The power supply allows unrestricted power from the electrical outlet into the computer. The HDMI port is to connect HD monitors to the computer. 64 bit processors will hopefully allow us to eliminate the graphics cards in computers one day. The MIDI port is to connect musical instruments to the computer.

Explanation / Answer

7) The serial and parallel ports are slow,have limited expandability and don't carry their own charge of electricity. These ports work fine for connecting Printers, Mice and keyboards to PC but all these device will perform better if connected to a USB port 8) RAM - Bytes; CPU- Hertz; Hard Drive - Bytes; Cache Memory- Both bytes and hertz 9) ROM - Read Only Memory, computer memory on which data has been prerecorded. Once data has been written onto a ROM chip, it cannot be removed and can only be read. Most personal computers contain a small amount of ROM that stores critical programs such as the program that boots the computer. In addition, ROMs are used extensively in calculators and peripheral devices such as laser printers, whose fonts are often stored in ROMs. 10) B

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