2 Digital Logic Online Quiz Questions

True or false: A combinational circuit’s outputs depend only on its current inputs, not on earlier inputs or stored state.

What logic gate reverses a single input value?

A truth table includes every possible combination of its inputs. How many rows of input combinations are needed for a circuit with three binary inputs?

A NOR gate receives $A = 0$ and $B = 0$. What is its output?

True or false: NAND is the complement of OR.

An OR gate receives $A = 1$ and $B = 1$. What is its output? Enter the output as 0 or 1.

Select all Boolean identities that are correct.

Evaluate $A \cdot 1 + A \cdot 0$ when $A = 1$. Choose the Boolean output value.

Which pair of gates implements a half adder’s sum and carry outputs?

For inputs $A = 1$ and $B = 0$, select all gates that output 1.

Describe a systematic process for designing a combinational circuit from its required behavior.

A circuit produces the complement of the OR of inputs $A$ and $B$. Which expression is equivalent to $\neg(A + B)$?

A designer finds an AND gate whose inputs are a signal $A$ and a constant 1. Which change preserves the circuit’s output?

A two-input circuit should output 1 whenever its binary inputs have the same value, and 0 when they differ. Which gate implements this behavior?

A two-input circuit should output 1 only when $A=0$ and $B=1$, and output 0 for the other input combinations. Which Boolean expression describes the circuit?

True or false: In Boolean algebra, $\neg(A \cdot B)$ is equivalent to $\neg A + \neg B$.

What gate outputs 1 when its two binary inputs differ and 0 when they match?

A designer removes an AND gate because one input is tied to 1, using $A \cdot 1 = A$. What is the general name of the Boolean algebra rule used?