The USB cable transmits data using the serial half-duplex data transmission method. Describe how the serial half-duplex data transmission method transmits the data.

Answer

0 words

4(c)Data Transmission MethodsEasy2 marks

One benefit of using the USB cable to connect the optical mouse to the computer is that bits of data are less likely to arrive out of order. Give two other benefits of using the USB cable to connect the optical mouse to the computer.

Two answers required.

4(d)Operating Systems System SoftwareMedium4 marks

One function performed by the operating system is managing peripherals. A role of this function is to install the drivers needed for the optical mouse. Complete the table with the missing functions and roles of an operating system.

function	role
providing an interface	Table answer interface_role 0 words
Table answer memory_function	It makes sure that two processes do not access the same memory location at the same time.
managing interrupts	Table answer interrupts_role 0 words
Table answer accounts_function 0 words	It allows the user to set a username and password.