Practice

Practice Where does a typical computer store its files? a. Micro SD card b. Windows c. Hard Drive d. USB e. Linux - CORRECT ANSWER-Hard Drive Motors should be connected directly to the GPIO pins for the best performance. a. True b. False - must be connected using an H bridge. - CORRECT ANSWER-False must be connected using an H bridge Analog signals have _______ possibilities of signals where as digital have _______ signal possibilities. a. Infinite, Infinite b. Finite, infinite c. Discrete, unlimited d. Infinite , finite E Limited, discrete - CORRECT ANSWER-Analog signals have _______ possibilities of signals where as digital have _______ signal possibilities. D A LCD alarm clock is an example of a a. An output device b. A analog device c. A digital device d. An input device - CORRECT ANSWER-A digital device A mp3 player is an example of a a. An output device b. A analog device c. A digital device d. An input device - CORRECT ANSWER-C In the digital system which is true: a. Each 0 or 1 is called a byte, 4 bits are called a nibble and 8 bits is called a byte , multiple bytes process a word. b. Each 0 or 1 is called a bit, 4 bits are called a nibble and 8 bits is called a byte , multiple bytes process a word. c. Each 0 or 1 is called a bit, 4 bytes are called a nibble and 8 bits is called a byte , multiple bytes process a word. d. Each 0 or 1 is called a bit, 4 bits are called a nibble and 8 bytes is called a bit , multiple bytes process a word. - CORRECT ANSWER-b. Each 0 or 1 is called a bit, 4 bits are called a nibble and 8 bits is called a byte , multiple bytes process a word What are the three chronological steps in order to convert analog to digital? a. Quantize, sample, encode. b. Sample, encode, quantize. c. Encode, sample, quantize. d. Sample, quantize, encode. - CORRECT ANSWER-D Sample, quantize, encode. After quantization you have a signal that is ____ in time and ____ in amplitude a. Discrete, continuous b. Discrete, discrete c. Infinite, continuous d. Only a collection of ones and zeros - CORRECT ANSWER-b. Discrete, discrete What is the Nyquist rule and what does it avoid? a. Use a sampling frequency at least double the maximum frequency to avoid aliasing. b. Use a sampling frequency more than half the maximum frequency to avoid aliasing c. Use a sampling frequency at least triple the maximum frequency to avoid aliasing. d. Use a sampling frequency equal to the maximum frequency to avoid aliasing. - CORRECT ANSWER-a. Use a sampling frequency at least double the maximum frequency to avoid aliasing. ____ devices require an external ADC whereas _____ devices have a built in ADC. a. Analog, analog b. Analog, digital c. Digital, digital d. Digital, analog