Top 350+ Solved Digital Electronics MCQ Questions Answer
Q. Which of the following is not an analog device?
a. thermocouple
b. current flow in a circuit
c. light switch
d. audio microphone
Q. A demultiplexer has ________.
a. one data input and a number of selection inputs, and they have several outputs
b. one input and one output
c. several inputs and several outputs
d. several inputs and one output
Q. A flip-flop has ________.
a. one stable state
b. no stable states
c. two stable states
d. none of the above
Q. Digital signals transmitted on a single conductor (and a ground) must be transmitted in:
a. slow speed.
b. parallel.
c. analog.
d. serial.
Q. In a certain digital waveform, the period is four times the pulse width. The duty cycle is ________.
a. 0%
b. 25%
c. 50%
d. 100%
Q. Select the statement that best describes the parity method of error detection:
a. parity checking is best suited for detecting double-bit errors that occur during the transmission of codes from one location to another.
b. parity checking is not suitable for detecting single-bit errors in transmitted codes.
c. parity checking is best suited for detecting single-bit errors in transmitted codes.
d. parity checking is capable of detecting and correcting errors in transmitted codes.
Q. A logic circuit that provides a HIGH output for both inputs HIGH or both inputs LOW is a(n):
a. ex-nor gate
b. or gate
c. ex-or gate
d. nand gate
Q. A logic circuit that provides a HIGH output if one input or the other input, but not both, is HIGH, is a(n):
a. ex-nor gate
b. or gate
c. ex-or gate
d. nand gate
Q. Identify the type of gate below from the equation
a. ex-nor gate
b. or gate
c. ex-or gate
d. nand gate
Q. Parity systems are defined as either________ or ________ and will add an extra ________ tothe digital information being transmitted.
a. positive, negative, byte
b. odd, even, bit
c. upper, lower, digit
d. on, off, decimal
Q. How is an encoder different from a decoder?
a. the output of an encoder is a binary code for 1-of-n input
b. the output of a decoder is a binary code for 1-of-n input
c. the output of an encoder is a binary code for n-of-1 output
d. the output of a decoder is a binary code for n-of-1 output
Q. If we record any music in any recorder, such types of process is called
a. multiplexing
b. encoding
c. decoding
d. demultiplexing
Q. Can an encoder be a transducer?
a. yes
b. no
c. may or may not be
d. both are not even related slightly