31. An analog voltage of 3.41 V is converted into 8-bit digital form by an A/D converter with a reference voltage of 5 V. The digital output is
32. In a 4 × 1 MUX, to get the Ex-OR equation at output, the values of I0, I1, I2, I3 should be . . . . . . . .
33. What device will perform the conversion of 4 bit BCD code to seven segment code required to drive a LED read out
34. What are the values respectively of R1 and R2 in the expression (235)R1 = (565)10 = (865)R2
35. The circuit shown in the figure is
36. Odd parity generator uses . . . . . . . . Logic
37. There are 4 variables in the Boolean function and the value of the function is 1. Find the number of cells in the K-Map which will contain a 1 when SOP expression is used.
38. A gray code is a/an:
39. (24)8 is expressed in Gray code as which one of the following?
40. If the functions W, X, Y and Z are as follows
$$\eqalign{
& {\text{W}} = {\text{R}} + \overline {\text{P}} {\text{Q}} + \overline {\text{R}} {\text{S}} \cr
& {\text{X}} = {\text{PQ}}\overline {\text{R}} \overline {\text{S}} + \overline {\text{P}} \overline {\text{Q}} \overline {\text{R}} \overline {\text{S}} + {\text{P}}\overline {\text{Q}} \overline {\text{R}} \overline {\text{S}} \cr
& {\text{Y}} = {\text{RS}} + \overline {{\text{PR}} + {\text{P}}\overline {\text{Q}} + \overline {\text{P}} \overline {\text{Q}} } \cr
& {\text{Z}} = {\text{R}} + {\text{S}} + \overline {{\text{PQ}} + \overline {\text{P}} \overline {\text{Q}} \overline {\text{R}} + {\text{P}}\overline {\text{Q}} \overline {\text{S}} } \cr} $$
Then
(a) W Z,X Z = = (b) W Z,X Y = =
(c) W = Z, X = Y (d) W Y Z
$$\eqalign{ & {\text{W}} = {\text{R}} + \overline {\text{P}} {\text{Q}} + \overline {\text{R}} {\text{S}} \cr & {\text{X}} = {\text{PQ}}\overline {\text{R}} \overline {\text{S}} + \overline {\text{P}} \overline {\text{Q}} \overline {\text{R}} \overline {\text{S}} + {\text{P}}\overline {\text{Q}} \overline {\text{R}} \overline {\text{S}} \cr & {\text{Y}} = {\text{RS}} + \overline {{\text{PR}} + {\text{P}}\overline {\text{Q}} + \overline {\text{P}} \overline {\text{Q}} } \cr & {\text{Z}} = {\text{R}} + {\text{S}} + \overline {{\text{PQ}} + \overline {\text{P}} \overline {\text{Q}} \overline {\text{R}} + {\text{P}}\overline {\text{Q}} \overline {\text{S}} } \cr} $$
Then (a) W Z,X Z = = (b) W Z,X Y = = (c) W = Z, X = Y (d) W Y Z
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