Digital Electronics and Logic Gates module quiz: binary, basic gates, NAND and NOR, truth tables and logic design (O-Level Electronics) quiz

One

Any number within a range

Ten

Two

$11$

$7$

$13$

$23$

When at least one input is 1

Only when both inputs are 1

Only when both inputs are 0

When the inputs are different

Only when both inputs are 1

Only when both inputs are 0

When at least one input is 1

Never

Combines two inputs

Stores a logic level

Outputs 1 only when both inputs match

Inverts a single input, turning 0 into 1 and 1 into 0

Because any logic function can be built from NAND gates alone

Because it is the cheapest gate

Because it has only one input

Because it never outputs 0

An OR gate followed by a NOT gate

An AND gate followed by a NOT gate

Two NOT gates in series

An AND gate followed by an OR gate

By leaving one input disconnected

By adding a resistor

By joining both inputs together

It cannot act as a NOT gate

1

Undefined

It depends on a third input

0

List every input combination and work through each gate stage by stage

Guess the final output for each row

Only consider the case where all inputs are 1

Assume the output is always 1

The final gate circuit

A truth table listing the output for every input combination

A potential divider

The power supply

3

6

8

9

$Q = A + B + C$

$Q = (A \cdot B) + C$

$Q = A \cdot B \cdot C$

$Q = A + (B \cdot C)$

Because it carries no information

Because it is always a sine wave

Because it has a higher voltage

Because the circuit only has to decide between two well-separated levels