Question 1

How many types of digital comparators are?
A)1
B)2
C)3
D)4

Accepted Answer

Digital comparators can be broadly classified into two types: magnitude comparators and equality comparators. Magnitude comparators compare the numerical value of two binary numbers, while equality comparators check if two binary numbers are equal.

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

Accepted Answer

An identity comparator is defined as a digital comparator that has only one output terminal, which indicates whether the compared values are equal or not.

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

Accepted Answer

A magnitude comparator typically has three output terminals indicating less than, equal to, and greater than conditions when comparing two binary numbers.

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

Accepted Answer

A digital comparator is designed to compare the magnitudes of numbers or variables to determine their relationship (greater than, less than, or equal to). It does not convert analog signals to digital, create outputs without comparison, or add 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

Accepted Answer

The TTL 74LS85 is a 4-bit magnitude comparator, designed to compare two 4-bit binary, BCD, or other monotonic codes and provide outputs that indicate the magnitude relationship of the inputs.

Question 6

How many inputs will a decimal-to-BCD encoder have?
A)4
B)8
C)10
D)16

Accepted Answer

A decimal-to-BCD (Binary-Coded Decimal) encoder converts a decimal input into a binary output. Since there are 10 possible decimal digits (0 through 9), a decimal-to-BCD encoder will have 10 inputs to represent each of these digits.

Question 7

How many outputs will a decimal-to-BCD encoder have?
A)4
B)8
C)12
D)16

Accepted Answer

A decimal-to-BCD (Binary-Coded Decimal) encoder converts a decimal digit (0-9) into its corresponding 4-bit binary representation, so it has 4 outputs.

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

Accepted Answer

An encoder converts 1-of-n input signals into a binary code, while a decoder does the reverse, converting a binary code into 1-of-n output signals.

Question 9

If we record any music in any recorder, such types of process is called______________      
A)multiplexing
B)encoding
C)decoding
D)demultiplexing

Accepted Answer

Recording music involves converting sounds into a format that can be stored and played back by a device, which is referred to as encoding.

Question 10

How many OR gates are required for a Decimal-to- bcd encoder?
A)2
B)10
C)3
D)4

Accepted Answer

The answer of How many OR gates are required for...

Question 11

How many OR gates are required for an octal-to- binary encoder?
A)3
B)2
C)8
D)10

Accepted Answer

An octal-to-binary encoder converts an 8-input line to a 3-output line, thus requiring only 3 OR gates for its implementation.

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

Accepted Answer

An enable input is used to control whether the circuit should be active or not, allowing the output to be 0 when all inputs are 0 or D0.

Question 13

Can an encoder be called as multiplexer?
A)no
B)yes
C)sometimes
D)never

Accepted Answer

An encoder can be considered a type of multiplexer because it selects one of many inputs and encodes it into a binary representation at the output, similar to how a multiplexer selects and forwards one of many inputs to a single output.

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

Accepted Answer

A priority encoder outputs the highest priority input that is active. If multiple inputs are active, the one with the highest priority (usually the highest value) is encoded on the output.

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

Accepted Answer

A multiplexer is a device that combines several input signals into one output signal, allowing multiple signals to be transmitted over a single line or medium.

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

Accepted Answer

A data selector, also known as a multiplexer, is specifically designed for selecting a single input from multiple inputs and directing the binary information to the output line.

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

Accepted Answer

Expanding the enable or strobe input of two or more multiplexer ICs increases the number of inputs that the digital multiplexer can handle, allowing it to process a larger amount of input data.

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

Accepted Answer

Multiplexing is a technique used to combine multiple signals into one signal, over a shared medium. The primary function of a multiplexing combinational circuit is to select a path between multiple sources and a single destination, allowing for efficient data transmission or processing.

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

Accepted Answer

The enable input on a multiplexer chip is used to activate the entire chip, allowing it to perform its function of selecting one of its input lines to be sent to the output.

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

Accepted Answer

Multiplexers can replace several Small-Scale Integration (SSI) logic gates or various combinational logic circuits, offering a more compact and efficient solution for routing digital signals.

Quiz 6: Digital Comparators, Encoders, and Multiplexers

How many types of digital comparators are?

An identify comparator is defined as a digital comparator which has______________

A magnitude comparator is defined as a digital comparator which has______________

The purpose of a Digital Comparator is

TTL 74LS85 is a______________

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

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

How is an encoder different from a decoder?

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

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

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

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

Can an encoder be called as multiplexer?

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

What is a multiplexer?

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

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______________

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

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

One multiplexer can take the place of______________