In Boolean algebra, the expression A + B describes which operation?

In Boolean algebra, the expression A + B describes which operation?

• A. And
• B. Or
• C. Not
• D. Exclusive OR

Answer: (B)

The plus sign between A and B represents the OR operation. OR outputs true when at least one input is true, so A + B is true if A is true, or B is true, or both are true. In digital logic terms, this corresponds to the OR gate, which lights up when any input is high. If you compare it to other operations, AND would require both A and B to be true, NOT would flip a single input, and Exclusive OR would be true only when A and B differ. So A + B clearly matches the OR operation.

The plus sign between A and B represents the OR operation. OR outputs true when at least one input is true, so A + B is true if A is true, or B is true, or both are true. In digital logic terms, this corresponds to the OR gate, which lights up when any input is high.

If you compare it to other operations, AND would require both A and B to be true, NOT would flip a single input, and Exclusive OR would be true only when A and B differ. So A + B clearly matches the OR operation.