计算机专业英语习题+答案
6页1、 习题+答案2.1Write T or F to each statementT6. An asynchronous device is a clocked device.T7. A latch is an asynchronous device, because it functions at arbitrary times.T8. The repetition of clock pulse can vary from very low rate to very high rate.T9. A synchronous device changes its state only on the arrival of a clock pulse.F10. A clock input may occur at any time.T11. The clock pulses are used to synchronize all operations of the shift register.T13. A unidirectional shift register is capable of
2、shifting in one direction only.F14. In a shift-left register the serial input determines what goes into the leftmost position during the shift register.F15. To provide parallel transfer capability some additional input and output linesshould be provided to the shift register.Choose the best answer for each of the following1. How can the output of a logic gate be energized?C A By changing its inputs. B By remaining its inputs unchanged. C By meeting the specific input condition. D By giving a pul
3、se.3. A NAND gate consists of D . A an OR gate followed by an inverter B an AND gate followed by an inverter C an AND gate followed by an OR gate D an inverter followed by an AND gate4. Under what condition is the output of a two-input XOR gate logic-high?B A Its inputs are simultaneously at the same logic level. B Its inputs are simultaneously at opposite logic levels. C Its inputs are logic-low. D its inputs are simultaneously logic-high.2.2 Write T or F for each statementT 1. The CPU uses the
4、 input and output units to communicate with the outside world.F2. Main memory is sometimes called external memory.F3. After execution the program and the related files of data and files of information will be retained in the main memory for later use.F4. Personal computers have not the features of the larger system.T5. Large systems offer higher processing speeds for user and return more data than PCs.F6. CPUs all size have primary storage, arithmetic logic, and the control section.F7. The outpu
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