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CSCI1412 Lecture 14 Q & A

phones off (please). CSCI1412 Lecture 14 Q & A. Basic Communications Dr John Cowell. Q 1. In 7-bit ASCII, the character ‘D’ is represented by 100 0100 What is the representation of ‘F’ in even parity 1100 0101 0100 0110 1100 0110 0000 1111 1111 000. Q2.

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CSCI1412 Lecture 14 Q & A

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  1. phones off(please) CSCI1412Lecture 14 Q & A Basic Communications Dr John Cowell

  2. Q 1 • In 7-bit ASCII, the character ‘D’ is represented by 100 0100What is the representation of ‘F’ in even parity • 1100 0101 • 0100 0110 • 1100 0110 • 0000 1111 • 1111 000 CSCI1412-HW-4

  3. Q2 • Which of the following statements bits is NOT correct? • Half duplex allows data transmission in one direction only. • Full duplex allows data transmission in both directions. • Full duplex transmission may be parallel or serial. • Simplex transmission can send data in both directions, but not at the same time. • Half duplex transmission may be synchronous or asynchronous CSCI1412-HW-4

  4. Q3 • Which of the following is NOT a characteristic of synchronous transmission? • Start/stop bits are sent after every character • The transmitting and receiving ends much synchronise their clocks. • A checksum is transmitted at the end of each message to ensure accuracy. • Synchronous mode is faster than asynchronous mode transmission. • Messages are broken down into packets or frames. CSCI1412-HW-4

  5. Q4 • Which of the following is an advantage of using the UNICODE system for storing characters? • UNICODE encoding of characters is more compact than ASCII. • UNICODE supports many non Latin character sets. • UNICODE compresses the representation of characters for data transmission. • Error checking of transmitted UNICODE characters is superior. • ASCII characters represented in binary may be incorrectly interpreted as integer values. CSCI1412-HW-4

  6. Answers: • Q1 – C • Q2 – D • Q3 – A • Q4 – B CSCI1412-HW-4

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