Digital Electronics Set 9
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This set of Digital Electronics Multiple Choice Questions & Answers (MCQs) focuses on Digital Electronics Set 9
Q1 | How many select lines are required for a 1- to-8 demultiplexer?
- 2
- 3
- 4
- 5
Q2 | How many AND gates are required for a 1- to-8 multiplexer?
- 2
- 6
- 8
- 5
Q3 | Which IC is used for the implementation of 1-to-16 DEMUX?
- ic 74154
- ic 74155
- ic 74139
- ic 74138
Q4 | All the comparisons made by comparator is done using
- 1 circuit
- 2 circuits
- 3 circuits
- 4 circuits
Q5 | One that is not the outcome of magnitude comparator is
- a > b
- a – b
- a < b
- a = b
Q6 | If two numbers are not equal then binary variable will be
- 0
- 1
- a
- b
Q7 | How many inputs are required for a digital comparator?
- 1
- 2
- 3
- 4
Q8 | In a comparator, if we get input as A>B then the output will be
- 1
- 0
- a
- b
Q9 | Comparators are used in
- memory
- cpu
- motherboard
- hard drive
Q10 | A circuit that compares two numbers and determine their magnitude is called
- height comparator
- size comparator
- comparator
- magnitude comparator
Q11 | A procedure that specifies finite set of steps is called
- algorithm
- flow chart
- chart
- venn diagram
Q12 | How many types of digital comparators are?
- 1
- 2
- 3
- 4
Q13 | An identify comparator is defined as a digital comparator which has
- only one output terminal
- two output terminals
- three output terminals
- no output terminal
Q14 | A magnitude comparator is defined as a digital comparator which has
- only one output terminal
- two output terminals
- three output terminals
- no output terminal
Q15 | The purpose of a Digital Comparator is
- to convert analog input into digital
- to create different outputs
- to add a set of different numbers
- to compare a set of variables or unknown numbers
Q16 | TTL 74LS85 is a
- 1-bit digital comparator
- 4-bit magnitude comparator
- 8-bit magnitude comparator
- 8-bit word comparator
Q17 | 4 to 1 MUX would have
- 2 inputs
- 3 inputs
- 4 inputs
- 5 inputs
Q18 | A combinational circuit that selects one from many inputs are
- encoder
- decoder
- demultiplexer
- multiplexer
Q19 | 4 to 1 MUX would have
- 1 output
- 2 outputs
- 3 outputs
- 4 outputs
Q20 | Which of the following circuit can be used as parallel to serial converter?
- multiplexer
- demultiplexer
- decoder
- digital counter
Q21 | The inputs/outputs of an analog multiplexer/demultiplexer are
- bidirectional
- unidirectional
- even parity
- binary-coded decimal
Q22 | If enable input is high then the multiplexer is
- enable
- disable
- saturation
- high impedance
Q23 | What is data routing in a multiplexer?
- it spreads the information to the control unit
- it can be used to route data from one of several source to destination
- it is an application of multiplexer
- both it can be used to route data and it is an application of multiplexer
Q24 | How many inputs will a decimal-to-BCD encoder have?
- 4
- 8
- 10
- 16
Q25 | How many outputs will a decimal-to-BCD encoder have?
- 4
- 8
- 12
- 16