Microprocessor And Interfacing Technique Set 2

Computer Science Engineering (CSE)

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This set of Microprocessor and Interfacing Technique Multiple Choice Questions & Answers (MCQs) focuses on Microprocessor And Interfacing Technique Set 2

Q1 | A high on ----pin causes all 24 lines of three 8 bit ports to be in the input mode
  • wr\
  • reset
  • gnd
  • vcc
Answer: reset
Q2 | For i/o mode of 8255,if -----,the word is taken as a mode definition word
  • d7=1
  • d7=0
  • d0=1
  • d0=0
Answer: d7=1
Q3 | For i/o mode of 8255 ,if -----, the word is taken as a bit set/reset word
  • d7=1
  • d7=0
  • d0=1
  • d0=0
Answer: d7=0
Q4 | On activation of --------,8255 loads data from the input port lines into the input buffer of that port
  • stb\
  • ibf
  • obf\
  • none
Answer: ibf
Q5 | IBF is an active-------- output signal for 8255
  • high
  • low
  • enable
  • disable
Answer: high
Q6 | 8255 sets INTR when STB'=-----,IBF=---------,INTE=--------,for input conrol signals
  • 1,0,1
  • 1,1,0
  • 1,1,1
  • 0,1,1
Answer: 1,1,1
Q7 | Upon activation of------ signal,output device reads data from output port and acknowledges it
  • intr
  • ack\
  • obf\
  • ibf
Answer: obf\
Q8 | In ------ of 8255 ,bidirectionali/o data transfer is possible
  • mode0
  • mode1
  • mode2
  • bsr mode
Answer: mode2
Q9 | Walkie-talkie is an example of serial communication
  • simplex
  • half-duplex
  • full-duplex
  • none
Answer: half-duplex
Q10 | Asynchronous serial communication involves transmission of
  • start bit
  • stop bit
  • character data
  • all
Answer: all
Q11 | Whichof the following is the fastest ADC
  • dual slope
  • successive approximation
  • flash
  • single slope
Answer: flash
Q12 | To indicate end of conversion ADC 0808/0809 ACTIVATES -----SIGNAL
  • eoc
  • soc
  • clk
  • output control
Answer: eoc
Q13 | Conversion time Tc of successive approximation ADC is given as
  • t(n-1)
  • t(n+1)
  • t(n)
  • t(n+2)
Answer: t(n+1)
Q14 | Conversion time of ADC 0808 IS
  • 100 ms
  • 100micro sec
  • 100 ms
  • 100ns
Answer: 100micro sec
Q15 | ADC 0809 IS A ----- PIN IC
  • 40
  • 20
  • 24
  • 28
Answer: 28
Q16 | Which is 16 Bit microprocessor:
  • 8088
  • 8086
  • 8085
  • all of these
Answer: all of these
Q17 | How many speed of 8088,8085,8086 microprocessor:
  • 2.5 million instruction per second
  • 1.5 million instruction per second
  • 3.5 million instruction per second
  • 1.6 million instruction per second
Answer: 2.5 million instruction per second
Q18 | Which processor provided 1 MB memory:
  • 16-bit 8086 and8088
  • 32-bit 8086and 8088
  • 64-bit 8086and 8088
  • 8-bit 8086and 8088
Answer: 16-bit 8086 and8088
Q19 | The stack pointer in the microprocessor is a
  • 16 bit register that point to stack
  • 32 bit accumulator
  • memory location in the stack
  • flag register used for the stack
Answer: 16 bit register that point to stack
Q20 | The register which holds the address of the location to or from which data are to be transferred is called
  • index register
  • instruction register
  • memory address register
  • memory data register
Answer: memory address register
Q21 | The register which contains the data to be written into or read out of the addressed location is called
  • memory address register
  • memory data register
  • program counter
  • index register
Answer: memory data register
Q22 | Which of the following is used as storage locations both in the ALU and the control section of a computer ?
  • accumulator
  • register
  • adder
  • decoder
Answer: register
Q23 | The register used as a working area in CPU is
  • program counter
  • instruction register
  • instruction decoder
  • accumulator
Answer: accumulator
Q24 | The device which is used to connect a peripheral to bus is called
  • control register
  • interface
  • communicatio n protocol
  • none of these
Answer: interface
Q25 | Which of the following is a set of general purpose internal registers ?
  • stack
  • scratch pad
  • address register
  • status register
Answer: scratch pad
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