| 1. | Two 2's complement numbers having sign bits x and y are added and the sign bit of the result is z. Then, the occurrence of overflow is indicated by the Boolean function ? | |
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xyz
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x’y’z’
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x’y’z + xyz’
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xy + yz + zx
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Report Question| 2. | The logic is said to be positive if ? | |
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upper level is 0, lower is 1
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lower level is 0, upper is 1
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two levels overlap
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both (a) and (b) are true
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| 3. | Which of the following notations have two representations of zero 1. 1's complement with radix of number being 2. 2. 7's complement with radix of number being 8. 3. 9's complement with radix of number being 10. 4. 10's complement with radix of number being 10. Select the correct answer using the code given below ? | |
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1, 2 and 4
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1 and 3
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2,3 and 4
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1, 2 and 3
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| 4. | Positive logic in a logic circuit is one in which ? | |
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logic 0 and 1 are represented by 0 and positive voltage respectively
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logic 0 and 1 are represented by the negative and positive voltages respectively
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logic 0 voltage level is higher than logic 1 voltage level
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logic 0 voltage level is lower than logic 1 voltage level
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| 5. | Three Boolean operators are ? | |
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NOT, OR, AND
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NOT, NAND, OR
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NOR, OR, NOT
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NOR, NAND, NOT
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| 6. | A three-input OR gate has output equal to 0 when ? | |
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all its inputs are high
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two of its inputs are high
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all are low
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one is high and the other two are low
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| 7. | Boolean algebra is also known as ? | |
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Gate algebra
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Transistor algebra
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Switching algebra
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Counting algebra
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| 8. | In Boolean algebra A.A is equal to ? | |
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A
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A²
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2A
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1
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| 9. | AND operation is equivalant to ? | |
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Division
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Union
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Intersection
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Both B and C
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| 10. | A positive logic OR gate is the same as a negative logic ? | |
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NOR gate
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OR gate
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EX-OR gate
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AND gate
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