1). Any number with an exponent of zero is equal to:
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2). In the decimal numbering system, what is the MSD? View AnswerANS: D - The digit with the most weight
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3). Which of the following statements does NOT describe an advantage of digital technology?
View AnswerANS: A - The values may vary over a continuous range.
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4). The generic array logic (GAL) device is ________.
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5). The range of voltages between VL(max) and VH(min) are ________.
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6). What is a digital-to-analog converter?
View AnswerANS: A - It takes the digital information from an audio CD and converts it to a usable form.
A DAC converts an abstract finite-precision number (usually a fixed-point binary number) into a concrete physical quantity (e.g., a voltage or a pressure).
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7). What are the symbols used to represent digits in the binary number system?
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8). A full subtracter circuit requires ________.
View AnswerANS: D - three inputs and two outputs
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9). The output of an AND gate is LOW ________.
View AnswerANS: B - when any input is LOW
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10). Give the decimal value of binary 10010.
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11). Parallel format means that:
View AnswerANS: A - each digital signal has its own conductor.
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12). A decoder converts ________.
View AnswerANS: B - coded information into noncoded form
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13). A DAC changes ________.
View AnswerANS: B - digital data into an analog signal
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14). The output of a NOT gate is HIGH when ________.
View AnswerANS: A - the input is LOW
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15). The output of an OR gate is LOW when ________.
View AnswerANS: A - all inputs are LOW
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16). Which of the following is not an analog device?
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17). A demultiplexer has ________.
View AnswerANS: A - one data input and a number of selection inputs, and they have several outputs
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18). A flip-flop has ________.
View AnswerANS: C - two stable states
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19). Digital signals transmitted on a single conductor (and a ground) must be transmitted in: View AnswerNo answer description available for this question.
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20). In a certain digital waveform, the period is four times the pulse width. The duty cycle is ________.
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21). In positive logic, ________.
View AnswerANS: A - a HIGH = 1, a LOW = 0
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22). Convert the fractional binary number 0000.1010 to decimal.
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23). Digital representations of numerical values of quantities may BEST be described as having characteristics:
View AnswerANS: D - that vary in discrete steps in proportion to the values they represent.
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24). A common instrument used in troubleshooting a digital circuit is a(n) ________.
View AnswerANS: D - all of the above
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25). The parallel transmission of digital data: View AnswerANS: C - requires as many signal lines between sender and receiver as there are data bits.
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26). Convert the fractional decimal number 6.75 to binary.
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27). What is one relative disadvantage of serial transfer?
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28). Which format requires fewer conductors?
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29). A pulse has a period of 15 ms. Its frequency is ________.
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30). Give the decimal value of binary 10000110.
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31). The rise time is the time it takes a pulse to go from ________.
View AnswerANS: D - 10% of the pulse amplitude to 90% of the pulse amplitude
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32). What is an analog-to-digital converter?
View AnswerANS: B - It takes analog signals and puts them in digital format.
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33). A multiplexer has ________.
View AnswerANS: D - several inputs and one output
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34). What is the decimal value of 23 ?
35). An encoder converts ________.
View AnswerANS: A - noncoded information into coded form
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36). What kind of logic device or circuit is used to store information?
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37). PLCC packages have leads on ________.
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38). What is the typical invalid voltage for a binary signal?
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39). Convert the fractional binary number 0001.0010 to decimal.
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40). Convert the fractional binary number 10010.0100 to decimal. View AnswerNo answer description available for this question.
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41). How many binary bits are necessary to represent 748 different numbers?
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42). A periodic digital waveform has a pulse width (tw ) of 6 ms and a period (T) of 18 ms. The duty cycle is ________.
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43). Any number with an exponent of one is equal to:
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44). Serial format means digital signals are:
View AnswerANS: B - sent over one conductor sequentially.
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45). What is the decimal value of 2–1 ?
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46). Which format can send several bits of information faster?
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47). The frequency of a pulse train is 2 kHz. The pulse period is ________.
View AnswerANS: C - 500 s
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48). What has happened to the advances in digital technologies over the past three decades?
View AnswerANS: D - Nothing short of phenomenal
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49). A type of digital circuit technology that uses bipolar junction transistors is ________.
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50). How many unique symbols are used in the decimal number system?
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51). A classification of ICs with complexities of 12 to 100 equivalent gates on a chip is known as ________. View AnswerNo answer description available for this question.
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52). Which of the following is a semiconductor memory? View AnswerNo answer description available for this question.
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53). The holes through a PC board are ________.
View AnswerANS: C - the same size as with through-hole mounting
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54). A classification of ICs with complexities of 100 to 10,000 equivalent gates per chip is known as ________.
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