In Boolean logic, which operator yields true only when both operands are true?

In Boolean logic, which operator yields true only when both operands are true?

• A. AND
• B. OR
• C. NOT
• D. XOR

Answer: (A)

When you need both conditions to be true for the result to be true, you use the AND operator. It yields true only when both operands are true; if either one is false, the result is false. For example, true AND true is true, while true AND false, false AND true, and false AND false are all false. This makes AND ideal for requiring multiple criteria to be met at the same time, such as finding items that satisfy two separate filters. In contrast, the OR operator yields true if at least one of the operands is true, so it would be true for true OR false, false OR true, and true OR true. The NOT operator inverts a single value, so NOT true becomes false and NOT false becomes true. The XOR (exclusive OR) operator is true when exactly one of the operands is true, not when both are true.

When you need both conditions to be true for the result to be true, you use the AND operator. It yields true only when both operands are true; if either one is false, the result is false. For example, true AND true is true, while true AND false, false AND true, and false AND false are all false. This makes AND ideal for requiring multiple criteria to be met at the same time, such as finding items that satisfy two separate filters.

In contrast, the OR operator yields true if at least one of the operands is true, so it would be true for true OR false, false OR true, and true OR true. The NOT operator inverts a single value, so NOT true becomes false and NOT false becomes true. The XOR (exclusive OR) operator is true when exactly one of the operands is true, not when both are true.