Pearson Edexcel (2020)

The binary number 10101010 is an 8-bit two’s complement binary number. What is the decimal equivalent?

Explain the process and importance of overflow in the context of unsigned and signed integers.

Convert the denary number 156 to an 8-bit binary number.

Convert the 8-bit binary number 11100101 to a denary number.

Convert the denary number 18 into an 8-bit binary number as an unsigned integer.

Convert the 8-bit binary number 11110110 into a denary number using two’s complement.

Why would a computer scientist choose to use an unsigned integer instead of a signed integer when designing a system?

Explain, in your own words, the difference between an unsigned integer and a two’s complement signed integer.