Digital Principles And System Design Set 19

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This set of Digital Principles and System Design Multiple Choice Questions & Answers (MCQs) focuses on Digital Principles And System Design Set 19

Q1 | How many types of digital comparators are?
  • 1
  • 2
  • 3
  • 4
Q2 | An identify comparator is defined as a digital comparator which has                          
  • only one output terminal
  • two output terminals
  • three output terminals
  • no output terminal
Q3 | A magnitude comparator is defined as a digital comparator which has                          
  • only one output terminal
  • two output terminals
  • three output terminals
  • no output terminal
Q4 | 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
Q5 | TTL 74LS85 is a                            
  • 1-bit digital comparator
  • 4-bit magnitude comparator
  • 8-bit magnitude comparator
  • 8-bit word comparator
Q6 | How many inputs will a decimal-to-BCD encoder have?
  • 4
  • 8
  • 10
  • 16
Q7 | How many outputs will a decimal-to-BCD encoder have?
  • 4
  • 8
  • 12
  • 16
Q8 | How is an encoder different from a decoder?
  • the output of an encoder is a binary code for 1-of-n input
  • the output of a decoder is a binary code for 1-of-n input
  • the output of an encoder is a binary code for n-of-1 output
  • the output of a decoder is a binary code for n-of-1 output
Q9 | If we record any music in any recorder, such types of process is called                        
  • multiplexing
  • encoding
  • decoding
  • demultiplexing
Q10 | How many OR gates are required for a Decimal-to- bcd encoder?
  • 2
  • 10
  • 3
  • 4
Q11 | How many OR gates are required for an octal-to- binary encoder?
  • 3
  • 2
  • 8
  • 10
Q12 | The discrepancy of 0 output due to all inputs being 0 or D0, being 0 is resolved by using additional input known as                        
  • enable
  • disable
  • strobe
  • clock
Q13 | Can an encoder be called as multiplexer?
  • no
  • yes
  • sometimes
  • never
Q14 | If two inputs are active on a priority encoder, which will be coded on the output?
  • the higher value
  • the lower value
  • neither of the inputs
  • both of the inputs
Q15 | What is a multiplexer?
  • it is a type of decoder which decodes several inputs and gives one output
  • a multiplexer is a device which converts many signals into one
  • it takes one input and results into many output
  • it is a type of encoder which decodes several inputs and gives one output
Q16 | Which combinational circuit is renowned for selecting a single input from multiple inputs & directing the binary information to output line?
  • data selector
  • data distributor
  • both data selector and data distributor
  • demultiplexer
Q17 | It is possible for an enable or strobe input to undergo an expansion of two or more MUX ICs to the digital multiplexer with the proficiency of large number of                        
  • inputs
  • outputs
  • selection lines
  • enable lines
Q18 | Which is the major functioning responsibility of the multiplexing combinational circuit?
  • decoding the binary information
  • generation of all minterms in an output function with or-gate
  • generation of selected path between multiple sources and a single destination
  • encoding of binary information
Q19 | What is the function of an enable input on a multiplexer chip?
  • to apply vcc
  • to connect ground
  • to active the entire chip
  • to active one half of the chip
Q20 | One multiplexer can take the place of                        
  • several ssi logic gates
  • combinational logic circuits
  • several ex-nor gates
  • several ssi logic gates or combinational logic circuits
Q21 | A digital multiplexer is a combinational circuit that selects                        
  • one digital information from several sources and transmits the selected one
  • many digital information and convert them into one
  • many decimal inputs and transmits the selected information
  • many decimal outputs and accepts the selected information
Q22 | In a multiplexer, the selection of a particular input line is controlled by                        
  • data controller
  • selected lines
  • logic gates
  • both data controller and selected lines
Q23 | If the number of n selected input lines is equal to 2^m then it requires            select lines.
  • 2
  • m
  • n
  • 2n
Q24 | How many select lines would be required for an 8- line-to-1-line multiplexer?
  • 2
  • 4
  • 8
  • 3
Q25 | A basic multiplexer principle can be demonstrated through the use of a                        
  • single-pole relay
  • dpdt switch
  • rotary switch
  • linear stepper