Deck 6: Digital Comparators, Encoders, and Multiplexers

Question 1

How many types of digital comparators are?

A)1
B)2
C)3
D)4

Answer 1

2

Question 2

An identify comparator is defined as a digital comparator which has______________        

A)only one output terminal
B)two output terminals
C)three output terminals
D)no output terminal

Answer 2

only one output terminal

Question 3

A magnitude comparator is defined as a digital comparator which has______________        

A)only one output terminal
B)two output terminals
C)three output terminals
D)no output terminal

Answer 3

three output terminals

Question 4

The purpose of a Digital Comparator is

A)to convert analog input into digital
B)to create different outputs
C)to add a set of different numbers
D)to compare a set of variables or unknown numbers

Question 5

TTL 74LS85 is a______________          

A)1-bit digital comparator
B)4-bit magnitude comparator
C)8-bit magnitude comparator
D)8-bit word comparator

Question 6

How many inputs will a decimal-to-BCD encoder have?

A)4
B)8
C)10
D)16

Question 7

How many outputs will a decimal-to-BCD encoder have?

A)4
B)8
C)12
D)16

Question 8

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

Question 9

If we record any music in any recorder, such types of process is called______________      

A)multiplexing
B)encoding
C)decoding
D)demultiplexing

Question 10

How many OR gates are required for a Decimal-to- bcd encoder?

A)2
B)10
C)3
D)4

Question 11

How many OR gates are required for an octal-to- binary encoder?

A)3
B)2
C)8
D)10

Question 12

The discrepancy of 0 output due to all inputs being 0 or D0, being 0 is resolved by using additional input known as______________      

A)enable
B)disable
C)strobe
D)clock

Question 13

Can an encoder be called as multiplexer?

A)no
B)yes
C)sometimes
D)never

Question 14

If two inputs are active on a priority encoder, which will be coded on the output?

A)the higher value
B)the lower value
C)neither of the inputs
D)both of the inputs

Question 15

What is a multiplexer?

A)it is a type of decoder which decodes several inputs and gives one output
B)a multiplexer is a device which converts many signals into one
C)it takes one input and results into many output
D)it is a type of encoder which decodes several inputs and gives one output

Question 16

Which combinational circuit is renowned for selecting a single input from multiple inputs & directing the binary information to output line?

A)data selector
B)data distributor
C)both data selector and data distributor
D)demultiplexer

Question 17

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______________      

A)inputs
B)outputs
C)selection lines
D)enable lines

Question 18

Which is the major functioning responsibility of the multiplexing combinational circuit?

A)decoding the binary information
B)generation of all minterms in an output function with or-gate
C)generation of selected path between multiple sources and a single destination
D)encoding of binary information

Question 19

What is the function of an enable input on a multiplexer chip?

A)to apply vcc
B)to connect ground
C)to active the entire chip
D)to active one half of the chip

Question 20

One multiplexer can take the place of______________      

A)several ssi logic gates
B)combinational logic circuits
C)several ex-nor gates
D)several ssi logic gates or combinational logic circuits

Question 21

A digital multiplexer is a combinational circuit that selects______________      

A)one digital information from several sources and transmits the selected one
B)many digital information and convert them into one
C)many decimal inputs and transmits the selected information
D)many decimal outputs and accepts the selected information

Question 22

In a multiplexer, the selection of a particular input line is controlled by______________      

A)data controller
B)selected lines
C)logic gates
D)both data controller and selected lines

Question 23

If the number of n selected input lines is equal to 2^m then it requires____________select lines.

A)2
B)m
C)n
D)2ⁿ

Question 24

How many select lines would be required for an 8- line-to-1-line multiplexer?

A)2
B)4
C)8
D)3

Question 25

A basic multiplexer principle can be demonstrated through the use of a______________      

A)single-pole relay
B)dpdt switch
C)rotary switch
D)linear stepper