32 Figure 4E.—R-S flip-flop with timing diagram. WHEN ANSWERING QUESTIONS 4-24 AND 4-25, REFER TO FIGURE 4E. 4-24. Assume the flip-flop is set at T0. At which of the following times will the flip-flop be reset? 1. T1 to T3, T5 to T6, and T9 to T102. T0 to T1, T3 to T5, and T6 to T93. T1 to T3, T5 to T7, and T9 to T104. T1 to T4, T5 to T7, and T9 to T104-25. What happens to the flip-flop at T6? 1. It sets 2. It resets 3. It sets and immediately resets 4. It remains reset 4-26. Which of the following statements describes a toggle flip-flop? 1. A monostable device 2. An astable device that changes state only on a set pulse 3. A two input bistable device 4. A bistable device with a single input 4-27. A T flip-flop is used primarily for which of the following functions? 1. To divide the input frequency by two 2. To double the input frequency3. To amplify the input frequency4. To invert the input frequency 4-28. What are the inputs to a D flip-flop? 1. Set and reset 2. Set and clock 3. Data and clock 4. Reset and data 4-29. What is the purpose of a D flip-flop? 1. To eliminate the output of the equipment 2. To divide the data input by the clock frequency 3. To store data until it is needed 4. To toggle the data input 4-30. An inverter on the clock input has which of the following effects on the D flip-flop? 1. The output will change on the negative-going transition of the clock pulse 2. The output will change on the positive-going transition of the clock pulse 3. The data input will change at the clock frequency 4. The output will change at the clock frequency 4-31. Which of the following statements is true concerning CLR and PR pulses to the D flip-flop? 1. CLR causes Q to go high, PR causes Q to go low 2. CLR and PR override any existing output condition 3. Other inputs override CLR and PR 4. CLR and PR have no effect on the output
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