Data Encoding and Decoding — Learn free

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Questions 1–10 of 10

1. What is the key difference between the keys used in encoding and the keys used in encryption?
Question 1A. Encoding keys are longer than encryption keysB. Encoding keys are used publicly by unknown entities, while encryption keys are used by known entitiesC. Encoding keys expire, while encryption keys do notD. Encoding uses no key at allE. Encryption keys are always public
2. Who or what normally performs data encoding and decoding?
Question 2A. Proprietary, expensive security softwareB. The security department manuallyC. Programs or systems internallyD. External regulatorsE. Business users through a BI tool
3. Which example illustrates the analog-data-to-digital-signal encoding technique?
Question 3A. A microphone connected directly to speakersB. A microphone connected to a computer for recordingC. A computer sending sound to speakersD. A computer transferring a file to another computerE. A radio tuned to an analog station
4. Which example illustrates digital data being encoded to analog signals?
Question 4A. A microphone to a computerB. A computer to a computerC. A computer to speakersD. A microphone to speakersE. A keyboard to a computer
5. A microphone connected directly to speakers is an example of which encoding technique?
Question 5A. Analog data to analog signalsB. Analog data to digital signalsC. Digital data to analog signalsD. Digital data to digital signalsE. Encrypted data to digital signals
6. What values does a digital signal carry?
Question 6A. A continuous range of valuesB. Only 0 and 1C. Any whole numberD. Time-varying qualitative valuesE. Positive and negative voltages of any size
7. Which type of signal is used in audio and video?
Question 7A. Digital signalsB. Encrypted signalsC. Analog signalsD. Binary signalsE. Packet signals
8. Which statement about breaks in transmission is correct?
Question 8A. There can be breaks in analog transmission but not in digitalB. There cannot be breaks in analog transmission, but there can be in digital transmissionC. Neither analog nor digital transmission can have breaksD. Both analog and digital transmission always have breaksE. Breaks occur only when data is encrypted
9. What is a signal, in the context of data encoding?
Question 9A. A key used to unlock encrypted dataB. An electromagnetic or electric current that carries data from one location to anotherC. A file format for compressing audioD. A software wrapper around a databaseE. A schedule for transferring data overnight
10. Which of the following is NOT one of the four major encoding techniques?
Question 10A. Analog data to analog signalsB. Analog data to digital signalsC. Digital data to optical signalsD. Digital data to analog signalsE. Digital data to digital signals