Digital Electronics Quiz

What is the decimal equivalent of the binary number 1010?

• 10

• 12

• 8

• 5

Which logic gate has an output of 1 only when all its inputs are 1?

• NOT gate

• OR gate

• NAND gate

• AND gate

Simplify the Boolean expression: (A + B) * (A + C)

• A + A * C + B * A + B * C

• A * A + A * C + B * A + B * C

• (A + B) * (A + C)

• A * C + B * A + B * C

What is the output of a half adder when the inputs are A = 1 and B = 0?

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What is the purpose of a flip-flop in sequential circuits?

• The purpose of a flip-flop in sequential circuits is to perform mathematical calculations.

• The purpose of a flip-flop in sequential circuits is to amplify signals.

• The purpose of a flip-flop in sequential circuits is to store and remember a single bit of information.

• The purpose of a flip-flop in sequential circuits is to generate random numbers.

Convert the decimal number 25 to binary.

• 11001

• 10010

• 11111

• 10101

Which logic gate has an output of 0 only when all its inputs are 1?

• NAND

• AND

• OR

• XOR

Simplify the Boolean expression: (A + B) * (A + C) + (B * C)

• A^2 + AB + AC + BC + B + C

• (A + B + C)^2

• A^2 + AB + AC + BC + B + C^2

• A^2 + AB + AC + BC + B * C

What is the output of a full adder when the inputs are A = 1, B = 1, and Cin = 1?

• 1

• 0

• 3

• 2

What is the difference between combinational and sequential circuits?

• Combinational circuits only depend on the current input, while sequential circuits depend on both the current and previous inputs.

• Combinational circuits are used for digital signals, while sequential circuits are used for analog signals.

• Combinational circuits and sequential circuits are the same thing.

• Combinational circuits depend on the current and previous inputs, while sequential circuits only depend on the current input.