$4\mathrm{.}1$ Explain the difference between an RFID scanner and a barcode scanner by focusing on the type of technology they use to read tags and barcodes. Clearly mention RFID and barcode followed by your answer.

$42$ Service packs used to be common in Windows operating systems but are not common in Windows $10$ and $11.$

$4\mathrm{.}2\mathrm{.}1$ Explain what a service pack is$.$

$4\mathrm{.}2\mathrm{.}2$ Explain why service packs are not common in Windows $11.$

$4\mathrm{.}3$ Explain the difference between SOHO users and users that work remotely based on the types of corrputing devices they are likely to use. Clearly mention SOHO and mobile user followed by your answer.

$4\mathrm{.}4$ Point of sale $($POS$)$ systems provide information to the user. Name TWO types of information supplied by a POS system.

$4\mathrm{.}5QR$ codes are used by indviduals and businesses. Briefly describe TWO disadvantages of using QR codes.

$4\mathrm{.}6$ You recommend that a friend upgrade his mobile device to the latest Android version, even though his smartphone works perfectly. Give THREE reasons why you make this recommendation.

$4\mathrm{.}7$ How employees work has changed a lot in recent years. Answer the questions that follow.

$4\mathrm{.}7\mathrm{.}1$ Give a brief description of an extranet.

$4\mathrm{.}7\mathrm{.}2$ Name TWO negative impacts of technology on the workplace.

$4\mathrm{.}7\mathrm{.}3$ Explain the relationship between telecommuting and an intranet.

$4\mathrm{.}8$ You have both a hard drive and a solid$-$state drive $($SSD$)$ installed in your computer. Which one will you choose to install the operating system on$?$ Motvate your answer.

$4\mathrm{.}9$ For each of the following situations, recommend whether you would use virtual reality $($VR$)$ or augmented reality $($AR$)$ and give a reason for your choice. Clearly mention VR and AR followed by your reason.

$4\mathrm{.}9\mathrm{.}1$ A tourist visiting a city while on holiday.

$4\mathrm{.}9\mathrm{.}2$ A student that is learning about the international space station.