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Test: Encoders - GATE MCQ


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10 Questions MCQ Test - Test: Encoders

Test: Encoders for GATE 2024 is part of GATE preparation. The Test: Encoders questions and answers have been prepared according to the GATE exam syllabus.The Test: Encoders MCQs are made for GATE 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Encoders below.
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Test: Encoders - Question 1

An encoder has _________ input lines _________ output lines.

Detailed Solution for Test: Encoders - Question 1

Encoder:

  • It is a combinational circuit which converts decimal number into binary number.
  • It consists 2n input lines and n output lines.
  • They do not have any select lines.
Test: Encoders - Question 2

Match the following

Detailed Solution for Test: Encoders - Question 2

Sequential circuit :

  • Sequential circuits are those circuits whose output depends on present output depends on present input and past output.
  • Sequential circuits contains memory elements.
  • Sequential circuits are constructed using Flip flops
  • examples: Counters, Shift registers, Serial adder

Combinational circuits :

  • Combinational circuits are those circuits whose present output depends only on the present input.
  • Combinational circuits do not contain memory elements.
  • Examples: adders, subtractions,  Decoder, Encoder, multiplexers

Combinational circuit: Parallel Adder,  BCD to 7 Segment Decoder, Priority Encoder

Sequential circuit: Serial adder,

P → 2, Q → 1, R → 1, S → 1

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Test: Encoders - Question 3

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

Detailed Solution for Test: Encoders - Question 3

An encoder is a combinational circuit encoding the information of 2n input lines to n output lines, thus producing the binary equivalent of the input. Thus, a Decimal-to-bcd converter has decimal values as inputs which range from 0-9. So, a total of 10 inputs are there in a decimal-to-BCD encoder.

Test: Encoders - Question 4

How is an encoder different from a decoder?

Detailed Solution for Test: Encoders - Question 4

n encoder is a combinational circuit encoding the information of 2n input lines to n output lines, thus producing the binary equivalent of the input. It performs the opposite operation of a decoder which results in 2n outputs from n inputs. Thus, an encoder different from a decoder because of the output of an encoder is a binary code for 1-of-N input.

Test: Encoders - Question 5

Can an encoder be a transducer?

Detailed Solution for Test: Encoders - Question 5

Of course, a transducer is a device that has the capability to emit data as well as to accept. Transducer converts signal from one form of energy to another.

Test: Encoders - Question 6

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

Detailed Solution for Test: Encoders - Question 6

An encoder is a combinational circuit encoding the information of 2n input lines to n output lines, thus producing the binary equivalent of the input.
Thus, in octal to binary encoder there are 8 (=23) inputs, thus 3 output lines.

Test: Encoders - Question 7

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

Detailed Solution for Test: Encoders - Question 7

Such problems are resolved by using enable input, which behaves as active if it gets 0 as input since it is an active-low pin.

Test: Encoders - Question 8

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

Detailed Solution for Test: Encoders - Question 8

An encoder is a combinational circuit encoding the information of 2n input lines to n output lines, thus producing the binary equivalent of the input. If two inputs are active on a priority encoder, the input of higher value will be coded in the output.

Test: Encoders - Question 9

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

Detailed Solution for Test: Encoders - Question 9

If we record any music in any recorder, it means that we are giving data to a recorder. So, such process is called encoding. Getting back the music from the recorded data is known as decoding.

Test: Encoders - Question 10

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

Detailed Solution for Test: Encoders - Question 10

An encoder is a combinational circuit encoding the information of 2n input lines to n output lines, thus producing the binary equivalent of the input. Thus, a decimal to BCD encoder has 4 outputs.

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