really need help answering these questions pls 1. A variable is a symbol in Boolean algebra used to represent (a) data (b) a condition (c) an action (d) answers (a), (b), and (c) 2. The Boolean expression A + B + C is (a) a sum term (b) a literal term (c) an inverse term (d) a product term
I really need help answering these questions pls
1. A variable is a symbol in Boolean algebra used to represent
(a) data
(b) a condition
(c) an action
(d) answers (a), (b), and (c)
2. The Boolean expression A + B + C is
(a) a sum term
(b) a literal term
(c) an inverse term
(d) a product term
3. The Boolean expression ABCD is
(a) a sum term
(b) a literal term
(c) an inverse term
(d) a product term
4. The domain of the expression ABCD + AB + CD + B is
(a) A and D
(b) B only
(c) A, B, C, and D
(d) none of these
5. According to the associative law of addition,
(a) A + B = B + A
(b) A = A + A
(c) (A + B) + C = A + (B + C )
(d) A + 0 = A
6. According to commutative law of multiplication,
(a) AB = BA
(b) A = AA
(c) (AB)C = A(BC )
(d) A0 = A
7. According to the distributive law,
(a) A(B + C) = AB + AC
(b) A(BC) = ABC
(c) A(A + 1) = A
(d) A + AB = A
8. Which one of the following is not a valid rule of Boolean algebra?
(a) A + 1 = 1
(b) A = A
(c) AA = A
(d) A + 0 = A
9. Which of the following rules states that if one input of an AND gate is always 1, the output is
equal to the other input?
(a) A + 1 = 1
(b) A + A = A
(c) A #A = A
(d) A #1 = A
10. According to DeMorgan’s theorems, the complement of a product of variables is equal to
(a) the complement of the sum
(b) the sum of the complements
(c) the product of the complements
(d) answers (a), (b), and (c)
11. The Boolean expression X = (A + B)(C + D) represents
(a) two ORs ANDed together
(b) two ANDs ORed together
(c) A 4-input AND gate
(d) a 4-input OR gate
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