A smartwatch has a built-in microphone that allows a person to use voice commands to control the smartwatch. Tick one box to show which type of device a microphone is.

1(b)Binary Hexadecimal Data UnitsEasy1 mark

The smartwatch stores data that is displayed for the user. Identify the smallest unit of data that is stored by the smartwatch.

1(c)(i)Binary Arithmetic Signed NumbersEasy1 mark

One item of data displayed on the smartwatch is the current outdoor temperature. The temperature is stored in a register as a two’s complement binary integer. Tick one box to show which base the two’s complement number system uses.

1(c)(ii)Binary Arithmetic Signed NumbersEasy1 mark

Give the two’s complement 8-bit binary integer that would be stored for the temperature of 32 degrees Celsius.

1(c)(iii)Binary Arithmetic Signed NumbersMedium1 mark

Give the two’s complement 8-bit binary integer that would be stored for the temperature of –14 degrees Celsius.

1(d)Embedded Systems Sensors ActuatorsEasy1 mark

Identify one example of a sensor that would be built into the smartwatch.