Question: 3-10. How many bits does ASCII use to represent keyboard characters? a. 1. b. 4. c. 7. d. 8. e. 32. 3-11. To transmit Next
3-10. How many bits does ASCII use to represent keyboard characters?
a. 1.
b. 4.
c. 7.
d. 8.
e. 32.
3-11. To transmit Next time. (without the quotation marks) in ASCII, how many bytes must you transmit?
a. 7.
b. 8.
c. 9.
d. 10.
e. 11.
3-12. Your computer screen has a resolution of 800 pixels horizontally and 600 pixels vertically. How many bytes will a JPEG screen image be?
a. 60,000.
b. 480,000.
c. 1,440,000.
d. 11,520,000.
3-13. In 232 serial ports, +3 to +15 volts represents a _____.
a. 1
b. 0
c. Both A and B
d. Neither A nor B
3-14. In 232 serial port transmission, a signal begins at 10 volts and attenuates by 75%. Will it still be received correctly?
a. Yes.
b. No.
3-15. In 232 serial port transmission, a signal begins at 10 volts and attenuates by 60%. Will it still be read correctly by the receiver?
a. Yes.
b. No.
3-16. A signal is sent at 9 volts in a 232 serial port. What fraction of its strength can it lose before it becomes unreadable?
a. 1/6
b. 1/3
c. 1/2
d 2/3
e. 5/6
3-17. What is the advantage of sending more bits per clock cycle with multistate digital signaling?
a. More bits can be sent per clock cycle.*
b. There are fewer errors.
c. Both A and B.
3-18. Is it correct to call all binary transmission digital transmission?
a. Yes.
b. No.
3-19. Which of the following is true?
a. Binary signaling is always digital signaling.*
b. Digital signaling is always binary signaling.
c. Both A and B.
d. Neither A nor B.
3-20. (If you read the box Digital Signaling.) Digital signaling is defined as signaling that has two states.
a. True.
b. False.
3-21. (If you read the box Digital Signaling.) _____ is defined as transmission in which there are only a few possible states.
a. Binary signaling
b. Digital signaling
c. 232 serial port transmission
d. Analog transmission
e. Voltage transmission
3-22. (If you read the box Digital Signaling.) Which of the following is true?
a. All binary signaling is digital.
b. All digital signaling is binary.
c. Both A and B are true.
d. Neither A nor B is true.
3-23. (If you read the box Digital Signaling.) In digital transmission, as the number of states increases, transmission speed _____.
a. increases
b. decreases
c. stays largely unchanged
3-24. (If you read the box Digital Signaling.) In digital transmission, as the number of states increases, error resistance _____.
a. increases
b. decreases
c. stays largely unchanged
3-25. (If you read the box Digital Signaling.) In digital transmission, as the number of states increases, _____.
a. transmission speed generally increases
b. error resistance generally increases
c. Both A and B
d. Neither A nor B
3-26. (If you read the box Digital Signaling.) In digital transmission, every time you double the number of states, ___.
a. you can send one more bit per clock cycle
b. the number of bits per clock cycle increases by the square of its previous value
c. Neither A nor B
3-27. (If you read the box Digital Signaling.) The number of clock cycles a transmission system uses per second is called its ______.
a. bit rate
b. baud rate
c. Both of the above.
d. Neither A nor B
3-28. (If you read the box Digital Signaling.) The rate at which data is transmitted is the ______.
a. bit rate
b. baud rate
c. Both A and B
d. Neither A nor B
3-29. (If you read the box Digital Signaling.) The bit rate equals the baud rate _____.
a. in all forms of digital transmission
b. in binary transmission
c. Both A and B
d. Neither A nor B
3-30. (If you read the box Digital Signaling.) If you have 10,000 clock cycles per second and transmit in binary, ________.
a. the bit rate is 10 kbps
b. the baud rate is 10 kbaud
c. Both A and B
d. Neither A nor B
3-31. (If you read the box Digital Signaling.) If you have 10,000 clock cycles per second and you transmit with 16 states, ________.
a. the bit rate is 40 kbps
b. the baud rate is 10 kbaud
c. Both A and B
d. Neither A nor B
3-32. (If you read the box Digital Signaling.) To transmit 30 kbps over a 10 kbaud line, how many states will you need?
a. 1.
b. 2.
c. 3.
d. 8.
e. 9.
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