Top 80+ Solved Microprocessor and Interfacing Technique MCQ Questions Answer
Q. 8255 sets INTR when STB'=-----,IBF=---------,INTE=--------,for input conrol signals
a. 1,0,1
b. 1,1,0
c. 1,1,1
d. 0,1,1
Q. Upon activation of------ signal,output device reads data from output port and acknowledges it
a. intr
b. ack\
c. obf\
d. ibf
Q. In ------ of 8255 ,bidirectionali/o data transfer is possible
a. mode0
b. mode1
c. mode2
d. bsr mode
Q. Walkie-talkie is an example of serial communication
a. simplex
b. half-duplex
c. full-duplex
d. none
Q. Asynchronous serial communication involves transmission of
a. start bit
b. stop bit
c. character data
d. all
Q. Whichof the following is the fastest ADC
a. dual slope
b. successive approximation
c. flash
d. single slope
Q. To indicate end of conversion ADC 0808/0809 ACTIVATES -----SIGNAL
a. eoc
b. soc
c. clk
d. output control
Q. Conversion time Tc of successive approximation ADC is given as
a. t(n-1)
b. t(n+1)
c. t(n)
d. t(n+2)
Q. How many speed of 8088,8085,8086 microprocessor:
a. 2.5 million instruction per second
b. 1.5 million instruction per second
c. 3.5 million instruction per second
d. 1.6 million instruction per second
Q. Which processor provided 1 MB memory:
a. 16-bit 8086 and8088
b. 32-bit 8086and 8088
c. 64-bit 8086and 8088
d. 8-bit 8086and 8088
Q. The stack pointer in the microprocessor is a
a. 16 bit register that point to stack
b. 32 bit accumulator
c. memory location in the stack
d. flag register used for the stack
Q. The register which holds the address of the location to or from which data are to be transferred is called
a. index register
b. instruction register
c. memory address register
d. memory data register