Overview of Digital Signals Binary Representation Hexadecimal Notation Bit Width Signed Numbers Floating Point Numbers Bringing it Together Physical Communication Layers Knowledge Check

Test Your Knowledge

Knowledge Check

1. What is the primary advantage of digital signals over analog signals?

They use less powerThey are more noise resistantThey are fasterThey are simpler to generate

2. How many unique values can be represented with 8 bits?

3. What is the hexadecimal representation of binary 1010 1111?

AFFAA77A

4. For a signed 8-bit number, what is the decimal value of binary 1000 in two's complement?

5. What happens when you add 1 to the largest possible value in an unsigned 8-bit number?

It becomes -1It wraps around to 0It stays at 255It causes an error

6. Name one method that provides protection against noise in digital signals:

7. An import energy variable. What is the most likely the variable type?

32-bit-signed16-bit-signed32-bit-unsigned16-bit-unsigned