1. for i/o of 8255,if -----, the word is taken as a bit set/rest word D7=0 D0=1 D7=1 D0=0 2. IBF is an active-------- output signal for 8255 low disable high enable 3. Asynchronous serial communication involves transmission of start bit stop bit character data All of the options 4. Conversion time Tc of successive approximation ADC is given as T(n) T(n-1) T(n+1) T(n+2) 5. ADC 0808 operates on single ---- power supply 20V 15V 5V 10V 6. In ------ of 8255 ,bidirectionali/o data transfer is possible mode1 mode2 BSR MODE mode0 7. 8255 has -------- i/o pins 28 22 24 26 8. Upon activation of------ signal,output device reads data from output port and acknowledges it IBF INTR OBF\ ACK\ 9. In 8255 ,BSR means ----- binary set/reset bit set/reset none byteset/reset 10. 8255 sets INTR when STB'=-----,IBF=---------,INTE=--------,for input conrol signals 1,0,1 0,1,1 1,1,1 1,1,0 11. BSR mode is used to set or reset the bitsin portA portB portD portC 12. Whichof the following is the fastest ADC single slope successive approximation DUAL SLOPE flash 13. in ----, bidirectional data transfer is possible mode 0 mode2 BSR mode1 14. To indicate end of conversion ADC 0808/0809 ACTIVATES -----SIGNAL EOC CLK OUTPUT CONTROL SOC 15. Transmission through telephone lines is an example of serial commuincation Full Duplex Half duplex Simplex none of the options 16. Walkie talkie is an example of serial communication half-duplex none full-duplex simplex 17. 8255 has ----i/o modes 2 3 8 4 18. Asynchronous serial communication involves start bit stop bits character data all of the options 19. for mode 3 of 8253/54, if the count is odd the output will be high for--- (n+1)/2 (n-1)/2 2/(n+1) 2/(n-1) 20. on activation of ----, 8255 loads data from the input port lines into the input buffer of that port OBF# IBF STB# none of the options 21. 8255 has three ----parallel ports 64 bit 8 bit 16 bit 32 bit 22. 8255 has three ----parrallel port 8bit 32bit 64bit 16bit 23. walkie-talkie is an example of serial communication Full Duplex Half duplex Simplex none of the options 24. Adc 0808 uses ----technique flash converter dual slope single step Successive apraximation 25. EOC means End of Conversion error of conversion Enable output conversion none of the options 26. to configure 8255 with port A output,Port B input port C lower output and port C upper input Mov A,0AAH mov al,0AEH Mov al,0AFH mov Al,0CEH 27. A high on ----pin causes all 24 lines of three 8 bit ports to be in the input mode Vcc WR\ RESET GND 28. 8253/54 has ----independent timers/counters 2 1 4 3 29. the signals provided by ADC are SOC ALE EOC all of the options 30. For i/o mode of 8255,if -----,the word is taken as a mode definition word D7=0 D0=1 D0=0 D7=1 31. Flash ADC consist of converters 2^n -1 2^n +1 2^n none of the options 32. 8253/54 timers can be programmed in---modes 6 3 5 1 33. ADC 0809 IS A ----- PIN IC 28 24 20 40 34. For i/o mode of 8255 ,if -----, the word is taken as a bit set/reset word D0=0 D0=1 D7=0 D7=1 35. On activation of --------,8255 loads data from the input port lines into the input buffer of that port NONE IBF STB\ OBF\ 36. ADC 0808 is ----- pin IC 28 24 40 20 37. Conversion time of ADC 0808 IS 100 ms 100ns 100micro sec 100 Ms 38. in mode 0 of 8253/54 ----disables counting gate=1 gate=0 wr#=0 wr#=1 39. A high on ---line indicates that the buffer register is empty TXC# TXRDY both TXE and TXC# TXE 40. 8253/54 has c----command that allows the user to check the count value programmed mode and current status of the counter read ahead read back write back write ahead Submit Answers Retake Test More Computer Science Engineering Study Material › Computer Science Engineering Mock Tests with Answers Distributed Computing System Mock Test Software Project Management Mock TestArtificial Intelligence and Robotics Mock TestBasics of Database Management Mock TestC# Programming Mock TestC#.NET Programming Mock TestCloud Computing Mock TestCommunication Network Mock TestComputer Architecture Mock TestComputer Architecture and Organization Mock TestComputer Fundamentals Mock TestComputer Networking Mock TestComputer Networks Mock TestCPP Programming Mock TestData Analysis Mock TestData Communication and Computer Network Mock TestData Compression and Data Retrieval Mock TestData Mining and Business Intelligence Mock TestData Mining and Data Warehouse Mock TestData Structure and Algorithms Mock TestData Structures Mock TestDataBase Management System Mock TestDesign and Analysis of Algorithms Mock TestDigital Electronics and Logic Design Mock TestDigital Logic Circuits Mock TestDigital Principles and System Design Mock TestDiscrete Mathematics Mock TestDiscrete Structure Mock TestDotNet Technology Mock TestEmbedded Real Time Operating System Mock TestGreen Computing Mock TestHigh Performance Computing Mock TestInformation Cyber Security Mock TestInformation and Network Security Mock TestInformation Retrival Techniques Mock TestInformation Systems and Engineering Economics Mock TestMachine Learning Mock TestMicroprocessor and Interfacing Technique Mock TestMicroprocessors Mock TestMuli core Architectures and Pro Mock TestMulti core processors Mock TestNetwork Security Mock TestNeural Networks and Fuzzy Control Object Oriented Programming Mock TestOperating System Architecture Mock TestOperating System Mock TestProblem Solving and Python Programming Mock TestProgramming for Problem Solving Mock TestPython Programming Mock TestSoft Computing Mock TestSoftware Design Modeling Mock TestSoftware Engineering Mock TestSoftware Testing Mock TestSoftware Testing and Quality Assurance Mock TestTheory of Computation and Compiler Design Mock TestTheory of Computation Mock TestUbiquitous Computing System Mock Test Computer Science Engineering Mock Tests
