Digital Principles And System Design Set 19 MCQs

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