Computer System Architecture - Digital Logic Circuits - Combinational Circuits
56. What logic function is performed by the circuit shown below?
- Option : D
- Explanation : Here total 7 NAND gates are present and in half adder one AND and one EX-OR gate are required. In turn one EX-OR gate can be built by 5 NAND where as one AND gate can be built by 2 NAND gates so this is diagram of half adder. So the answer is (D).
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57. What is the Boolean expression for the following circuit?
- Option : A
- Explanation : Ans is A as input to 1st OR gate is A, and B' so output of 1st OR gate is (A+B') In the same way output for 2nd OR gate is (A'+B) So Final output will be (A+B')'. (A'+B)'
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58. In the circuit shown below, which logic function does this circuit generate?
- Option : D
- Explanation :
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59. Output of the following circuit is
- Option : A
- Explanation : Truth Table for XOR
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60. A small dot or circle printed on top of an IC indicates
- Option : D
- Explanation :
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