M5.5 Logic Circuits Cat B1

What is the purpose of the circuit below?

• To perform the basic addition of two or more binary numbers.

• To perform the basic addition of two binary numbers and always create the carry signal.

• To perform the basic addition of two binary numbers but cannot handle a 'carry in' from previous addition.

What does a parallel adder require?

• Adder logic for the number to be added.

• Only one adder for the number to be added.

• Adder logic for each bit of the number to be added.

The truth table shown is for which logic gate below?

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The truth table shown is for which logic gate below?

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Which logic gate is this?

• OR

• AND

• NOT

• NOR

Which logic gate is this?

• OR

• AND

• NOT

• NOR

Which logic function is also called an Inverter?

• OR gate

• AND gate

• NOT gate

Which are the three basic logic functions from which all others were created?

• AND, OR, NOR

• AND, OR, NOT

• AND, NOR, Inverter

• AND, OR, XOR

An AND gate is connected to an inductor that when energised keeps a power off flag hidden, what would the input/output logic of the AND gate be to keep the coil energised?

• Inputs all at 1 to get 1 output.

• Any of the inputs at 1 to get and output at 1.

• An output of one is only achieved with mismatched input values.

What is the purpose of logic circuits and flow diagrams?

• The represent function and the power supplies of the logic circuits.

• They represent function and aid fault finding.

• The diagrams are low level circuit schematics that serve only training purposes.