**(i) ****No. of inputs and outputs**

Number of inputs = 4

Number of outputs = 4

**(ii)****Assigning letter symbols**

Symbols of inputs – A, B, C, D

Symbols of outputs – W, X, Y, Z

**(iii)****Truth table**

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10

**(i) ****No. of inputs and outputs**

Number of inputs = 4

Number of outputs = 4

**(ii)****Assigning letter symbols**

Symbols of inputs – A, B, C, D

Symbols of outputs – W, X, Y, Z

**(iii)****Truth table**

Let us first see how to convert decimal number to 9′s and 10′s complement. 9′s complement of decimal number can be obtained by ((10^{n} - 1)-number) where n represents the number of digits in given number. 10′s complement can be obtained by (10^{n} – number) where n represents the number of digits in given number.

Consider - (1234)_{10} 9′s complement = 10^{4}-1-1234 = 9999-1234 = 8765

10′s complement = 10^{4}-1234 = 8766 Continue reading