Top 350+ Solved Digital Electronics and Logic Design MCQ Questions Answer
Q. Which of the following unit will choose to transform decimal number to binary code ?
a. encoder
b. decoder
c. multiplexer
d. counter
Q. The flip-flops which operate in synchronism with external clock pulses are known as
a. synchronous flip-flop
b. asynchronou s flip-flop
c. either of the above
d. none of these
Q. Which of the following flip-flop is free from race-around problem ?
a. q flip-flop
b. t flip-flop
c. sr flip-flop
d. master- slave jk flip-flop
Q. If the input J is connected through K input of J-K, then flip-flop will behave as a
a. d type flip-flop
b. t type flip- flop
c. s-r flip-flop
d. master slave jk flip-flop
Q. If a clock with time period 'T' is used with n stage shift register, then output of final stage will be delayed by
a. nt sec
b. (n-1)t sec
c. n/t sec
d. (2n+1)tsec
Q. Register is a
a. set of capacitor used to register input instructions in a digital computer
b. set to paper tapes and cards put in a file
c. temporary storage unit within the cpu having dedicated or general purpose use
d. part of the main memory
Q. If in a shift resistor Q0 is fed back to input the resulting counter is
a. twisted ring with n : 1 scale
b. ring counter with n : 1 scale
c. twisted ring with 2n : 1 scale
d. ring counter with 2 n : 1 scale
Q. In a sequential circuit the next state is determined by and
a. state variable, current state
b. current state, flip- flop output
c. current state and external input
d. input and clock signal applied
Q. The divide-by-60 counter in digital clock is implemented by using two cascading counters:
a. mod-6, mod-10
b. mod-50,mod-10
c. mod-10,mod-50
d. mod-50,mod-6
Q. In a state diagram, the transition from a current state to the next state is determined by
a. current state and the inputs
b. current state and outputs
c. previous state and inputs
d. previous state and outputs
Q. is used to simplify the circuit that determines the next state.
a. state diagram
b. next state table
c. state reduction
d. state assignmen t
Q. THE GLITCHES DUE TO RACE CONDITION CAN BE AVOIDED BY USING A
a. gated flip- flops
b. pulse triggered flip-flops
c. positive- edge triggered flip-flops
d. negative-edge triggere d flip- flops