Question 1
Digital ElectronicsBoolean Algebra
According to Boolean algebra, A + 0 equals?
Correct Answer: C. A
Explanation: The OR identity law states A + 0 = A.
Reference: Boolean algebra identity law
Boolean Algebra MCQs
Practice Boolean Algebra MCQs with four options, answers and explanations for focused Electronics & Telecommunication Engineering revision.
Question 2
Digital ElectronicsBoolean Algebra
According to Boolean algebra, A·1 equals?
Correct Answer: A. A
Explanation: The AND identity law states A·1 = A.
Reference: Boolean algebra identity law
Question 3
Digital ElectronicsBoolean Algebra
According to Boolean algebra, A + A equals?
Correct Answer: C. A
Explanation: The idempotent law for OR is A + A = A.
Reference: Boolean algebra idempotent law
Question 4
Digital ElectronicsBoolean Algebra
According to De Morgan’s theorem, the complement of A·B is?
Correct Answer: B. A̅ + B̅
Explanation: De Morgan's theorem gives (A·B)̅ = A̅ + B̅.
Reference: De Morgan's theorem
Question 5
Digital ElectronicsBoolean Algebra
Simplify the Boolean expression A + A·B.
Correct Answer: A. A
Explanation: By the absorption law, A + AB = A.
Reference: Standard digital electronics: Boolean absorption law
Question 6
Digital ElectronicsBoolean Algebra
Simplify the Boolean expression A(A + B).
Correct Answer: A. A
Explanation: By the absorption law, A(A + B) = A.
Reference: Standard digital electronics: Boolean absorption law
Question 7
Digital ElectronicsBoolean Algebra
According to De Morgan’s theorem, the complement of (A + B) is?
Correct Answer: B. A complement · B complement
Explanation: De Morgan's theorem gives complement(A + B) = complement(A) · complement(B).
Reference: Standard digital electronics: De Morgan's theorem