Digital Electronics Set 1
On This Page
This set of Digital Electronics Multiple Choice Questions & Answers (MCQs) focuses on Digital Electronics Set 1
Q1 | Any number with an exponent of zero is equal to:
- zero
- one
- that number
- ten
Q2 | In the decimal numbering system, what is the MSD?
- the middle digit of a stream of numbers
- the digit to the right of the decimal point
- the last digit on the right
- the digit with the most weight
Q3 | Which of the following statements does NOT describe an advantage of digital technology?
- the values may vary over a continuous range.
- the circuits are less affected by noise.
- the operation can be programmed.
- information storage is easy.
Q4 | The generic array logic (GAL) device is ________.
- one-time programmable
- reprogrammable
- a cmos device
- reprogrammable and a cmos device
Q5 | The range of voltages between VL(max) and VH(min) are ________.
- unknown
- unnecessary
- unacceptable
- between 2 v and 5 v
Q6 | What is a digital-to-analog converter?
- it takes the digital information from an audio cd and converts it to a usable form.
- it allows the use of cheaper analog techniques, which are always simpler.
- it stores digital data on a hard drive.
- it converts direct current to alternating current.
Q7 | What are the symbols used to represent digits in the binary number system?
- 0,1
- 0,1,2
- 0 through 8
- 1,2
Q8 | A full subtracter circuit requires ________.
- two inputs and two outputs
- two inputs and three outputs
- three inputs and one output
- three inputs and two outputs
Q9 | The output of an AND gate is LOW ________.
- all the time
- when any input is low
- when any input is high
- when all inputs are high
Q10 | Give the decimal value of binary 10010.
- 610
- 910
- 1810
- 2010
Q11 | Parallel format means that:
- each digital signal has its own conductor.
- several digital signals are sent on each conductor.
- both binary and hexadecimal can be used.
- no clock is needed.
Q12 | A decoder converts ________.
- noncoded information into coded form
- coded information into noncoded form
- highs to lows
- lows to highs
Q13 | A DAC changes ________.
- an analog signal into digital data
- digital data into an analog signal
- digital data into an amplified signal
- none of the above
Q14 | The output of a NOT gate is HIGH when ________.
- the input is low
- the input is high
- the input changes from low to high
- voltage is removed from the gate
Q15 | The output of an OR gate is LOW when ________.
- all inputs are low
- any input is low
- any input is high
- all inputs are high
Q16 | Which of the following is not an analog device?
- thermocouple
- current flow in a circuit
- light switch
- audio microphone
Q17 | A demultiplexer has ________.
- one data input and a number of selection inputs, and they have several outputs
- one input and one output
- several inputs and several outputs
- several inputs and one output
Q18 | A flip-flop has ________.
- one stable state
- no stable states
- two stable states
- none of the above
Q19 | Digital signals transmitted on a single conductor (and a ground) must be transmitted in:
- slow speed.
- parallel.
- analog.
- serial.
Q20 | In a certain digital waveform, the period is four times the pulse width. The duty cycle is ________.
- 0%
- 25%
- 50%
- 100%
Q21 | Select the statement that best describes the parity method of error detection:
- parity checking is best suited for detecting double-bit errors that occur during the transmission of codes from one location to another.
- parity checking is not suitable for detecting single-bit errors in transmitted codes.
- parity checking is best suited for detecting single-bit errors in transmitted codes.
- parity checking is capable of detecting and correcting errors in transmitted codes.
Q22 | A logic circuit that provides a HIGH output for both inputs HIGH or both inputs LOW is a(n):
- ex-nor gate
- or gate
- ex-or gate
- nand gate
Q23 | A logic circuit that provides a HIGH output if one input or the other input, but not both, is HIGH, is a(n):
- ex-nor gate
- or gate
- ex-or gate
- nand gate
Q24 | Identify the type of gate below from the equation
- ex-nor gate
- or gate
- ex-or gate
- nand gate
Q25 | Parity systems are defined as either________ or ________ and will add an extra ________ tothe digital information being transmitted.
- positive, negative, byte
- odd, even, bit
- upper, lower, digit
- on, off, decimal