MCQs on Digital Electronics


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01․ In SSI, the number of gate circuits per chip is
< 6
< 12
< 20
< 25


02․ In MSI, the number of gate circuits per chip is
< 50
12 to 99
50 to 100
< 500

In MSI i.e. Medium Scale Integration number of gate circuits per chip is more than 10 but less than 100.

03․ In LSI, the number of gate circuits per chip is
100 to 999
100 to 9,999
1000 to 10,000
< 10,000

In LSI i.e. Large Scale Intergration the number of gate circuits will be more than 100.

04․ In VLSI, the number of gate circuits per chip is
< 10,000
> 10,000
10,000 to 99,999
50,000 to 99,999

In VLSI, the number of gate circuits per chip is > 10000 but less than 1,00,000

05․ In ULSI, the number of gate circuits per chip is
> 50,000
50,000 to 99,999
> 1,00,000
1,00,000 to 10,00,000

In ULSI, the number of gate circuits per chip is >1,00,000 or > 1 million transistors.

06․ A device which converts decimal number into BCD form is called
encoder
decoder
code converter
multiplexer

Encoder is a combinational circuit which have many inputs and many outputs. Encoder is used to convert other codes to binary. Such as, octal to binary, decimal to BCD and hexa decimal to binary.

07․ A device which converts BCD into octal is called
encoder
decoder
code converter
demultiplexer

Decoder is a combinational circiut which have many inputs and many outputs. Decoder is used to convert binary to other codes. Such as , binary to octal, binary to hexa decimal and BCD to decimal.

08․ A multiplexer is a
1-to-N device
N-to-1 device
1-to-1 device
N-to-N device

Multiplexer is a combinational circuit which have many data inputs and one output. Depending on select or control one of the data input is transfered to the output. Hence it is known as many to one circuit (N-to-1 device ).

09․ A demultiplexer is a
1-to-N device
N-to-1 device
1-to-1 device
N-to-N device

Demultiplexer is a simple circuit which have one input and many outputs. Demux is also called as one to many circuit (1-to-N device ) or data distributor.

10․ A device which converts 2421 code into 8421code is called a
code converter
code decoder
code encoder
coder

2421 is weghted self complimented code and 8421 is weighted code. A device which converts 2421 code into 8421 code is called as a code converter.

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