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Unformatted text preview: MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. A ________ is a disturbance that propagates down a transmissio n medium to the other side, which reads it. 1) _______ A) bit B) packet D) byte E) signal When a signal travels, this is called ________. 2) _______ A) end to end transm B) a propagation effect D) propagation E) hop by hop transmission Changes in a signal during propagatio n are called, most generally, ________. 3) _______ A) interference effects B) transmission effects D) distortion effects E) attenuation effects In binary, 13 is 1101. What is 14? 4) _______ A) 1111. B) 1110. C) N eit r or B 5 You have N bits. You can represent ________ choices. 5) _______ A) B) Either A. or B., depending on the circumstances. You have three bits. How many possibilities can you represent? 6) _______ A) 2. B) 3. C) 6. D) 8. E) 9 . 7 You need to represent in binary whether a piece of music is classical, hip hop, or ethnic. How many bits will you need? 7) _______ A) 1. B) 2. C) 3. D) 8. E) 9 . 8 You need to represent 35 courses being offered by a department . How many bits will you need? 8) _______ A) 2. B) 3. C) 4. D) 5. E) 6 . 9 What is the binary equivalent of 3? 9) _______ A) 100. B) 1110. C) 101. D) 11. E) 1 1 . 1 How many bits does ASCII use to represent keyboard characters? 10) ______ A) 1. B) 4. C) 7. D) 8. E) 3 2 1 To transmit "Next time." (without the quotation marks) in ASCII, how many bytes must you transmit? 11) ______ A) 7. B) 8. C) 9. D) 10. E) 1 1 1 Your computer screen has a resolution of 800 pixels horizontall y and 600 pixels vertically. How many bytes will a JPEG screen image be? 12) ______ A) 60,000. B) 480,000 . 1,440,000. D) 11,520, 000. 1 In 232 serial ports, + 3 to + 15 volts represents a ________. 13) ______ A) 0 B) 1 Both A and B D) Neither A nor B 1 In 232 serial port transmissio n, a signal begins at 10 volts and attenuates by 75%. Will it still be received correctly? 14) ______ A) No. B) Yes. 1 In 232 serial port transmissio n, a signal begins at 10 volts and attenuates by 60%. Will it still be read correctly by the receiver? 15) ______ A) Yes. B) No. 1 A signal is sent at 9 volts in a 232 serial port. What fraction of its strength can it lose before it becomes unreadable ? 16) ______ A) 2/3. B) 1/6. C) 5/6. D) 1/3. E) 1 / . 1 What is the advantage of sending more bits per clock cycle with multistate digital signaling? 17) ______ A) More bits can be sent p B) Both A and B Is it correct to call all binary transmissio n digital transmissio n? 18) ______ A) No. B) Yes. 1 Which of the following is true? 19) ______ A) Binary signaling is alw B) Both A and B D) Neither A nor B (If you read the box "Digital Signaling.") Digital signaling is defined as signaling that has two states. 20) ______ A) True. B) False....
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 Summer '09
 ManoelOliveira

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