In which of the following gates, the output is 1, if and only if at least one input is 1?
A. | NOR |
B. | AND |
C. | OR |
D. | NAND |
Option: C Explanation : In OR gate we need atleast one bit to be equal to 1 to generate the output as 1 because OR means any of the condition out of two is equal to 1 which means if atleast one input is 1 then it shows output as 1 . Number of 1's in input may be more than one but the output will always be 1 in OR gate. So the answer is 'C'. |
A. | Rise time |
B. | Decay time |
C. | Propagation time |
D. | Charging time |
Option: C Explanation : |
A. | Rise time |
B. | Decay time |
C. | Propagation time |
D. | Operating speed |
Option: A Explanation : |
A. | Operating speed |
B. | Propagation speed |
C. | Binary level transaction period |
D. | Charging time |
Option: A Explanation : |
What is the minimum number of two-input NAND gates used to perform the function of two input OR gate ?
A. | one |
B. | two |
C. | three |
D. | four |
Option: C Explanation : Y=A+B. This is the equation of OR gate. We require 3 NAND gates to create OR gate. We can also write
After 1^{st} NAND operation So we need 3 NAND gates. |
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