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Microprocessors Practice Test
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Avg score: 66% Most missed: “8253/54 has c....command that allows the user to check the count value programme…”
The microprocessor contains the arithmetic, logic, and control circuitry necessary to perform the functions of a digital computer's central processing unit. A microprocessor is a computer processor where the data processing logic and control is included on a single integrated circuit (IC), or a small number of ICs. The microprocessor contains the arithmetic, logic, and control circuitry required to perform the functions of a computer's central processing unit (CPU). The IC is capable of interpreting and executing program instructions and performing arithmetic operations. The microprocessor... Show more
Microprocessors Practice Test
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25 Questions

1. Upon activation of...... signal,output device reads data from output port and acknowledges it
2. in mode 0 of 8253/54 ....disables counting
3. For i/o mode of 8255 ,if ....-, the word is taken as a bit set/reset word
4. 8255 has three ....parallel ports
5. On activation of ........,8255 loads data from the input port lines into the input buffer of that port
6. Walkie-talkie is an example of …..serial communication
7. Whichof the following is the fastest ADC
8. ADC 0808 is ....- pin IC
9. Asynchronous serial communication involves transmission of
10. 8255 has three ....parrallel port
11. in ...., bidirectional data transfer is possible
12. To indicate end of conversion ADC 0808/0809 ACTIVATES ....-SIGNAL
13. 8253/54 has c....command that allows the user to check the count value programmed mode and current status of the counter
14. 8255 has ....i/o modes
15. the signals provided by ADC are
16. Transmission through telephone lines is an example of….serial commuincation
17. Adc 0808 uses ....technique
18. Flash ADC consist of….converters
19. Walkie-talkie is an example of serial communication
20. IBF is an active........ output signal for 8255
21. 8255 sets INTR when STB'=....-,IBF=........-,INTE=........,for input conrol signals
22. on activation of ...., 8255 loads data from the input port lines into the input buffer of that port
23. for mode 3 of 8253/54, if the count is odd the output will be high for..-
24. A high on ..-line indicates that the buffer register is empty
25. for i/o of 8255,if ....-, the word is taken as a bit set/rest word