Q121
Open questionThe output F in the digital logic circuit shown in the figure is
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Digital Electronics
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Q122
Open questionFollowing is the K-map of a Boolean function of five variables P, Q, R, S and X. The minimum sum-of-product (SOP) expression for the function is
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Q123
Open questionY = A ⊕ B ⊕ A, where ⊕ represents XOR, is equal to:
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Q124
Open questionMatch List-I with List-II and select the correct answer using the options given below the lists
| List-I | List-II |
| a. 45 | 1. 10110100 |
| b. 90 | 2. 11010010 |
| c. 180 | 3. 01011010 |
| d. 210 | 4. 00101101 |
| 5. 10101000 |
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Q125
Open questionA 4-bit R/2R digital-to-analog (DAC) converter has a reference of 5 volts. What is the analog output for the input code 0101?
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Q126
Open questionAn expression can be reduced to
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Q127
Open questionIn Boolean Algebra, A(A + B') is equivalent to:
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Q128
Open questionChoose the correct one from among the alternatives A, B, C, D after matching an item from List-I with the most appropriate item in List-II
| List-I | List-II |
| a. Shift register | 1. Frequency division |
| b. Counter | 2. Addressing in memory chips |
| c. Decoder | 3. Serial to parallel data conversion |
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Q129
Open questionA full adder circuit is constructed from two 2 input Ex OR gates, two 2-input AND gate and a
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Q130
Open questionWhich one of the following logical operations is performed by the digital circuit shown below?
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Q131
Open questionAn 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
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Q132
Open questionIn a 4 × 1 MUX, to get the Ex-OR equation at output, the values of I0, I1, I2, I3 should be . . . . . . . .
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Q133
Open questionWhat device will perform the conversion of 4 bit BCD code to seven segment code required to drive a LED read out
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Q134
Open questionWhat are the values respectively of R1 and R2 in the expression (235)R1 = (565)10 = (865)R2
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Q135
Open questionThe circuit shown in the figure is
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Q136
Open questionOdd parity generator uses . . . . . . . . Logic
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Q137
Open questionThere 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.
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Q138
Open questionA gray code is a/an:
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Q139
Open question(24)8 is expressed in Gray code as which one of the following?
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Q140
Open questionIf the functions W, X, Y and Z are as follows
Then (a) W Z,X Z = = (b) W Z,X Y = = (c) W = Z, X = Y (d) W Y Z
Then (a) W Z,X Z = = (b) W Z,X Y = = (c) W = Z, X = Y (d) W Y Z
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