QUESTION 4: SYSTEMS TECHNOLOGIES 4.1 State TWO disadvantages of wireless keyboards - NSC Computer Application Technology - Question 4 - 2017 - Paper 2

1. The GUI of a mobile app is designed for smaller screens, making buttons and components larger for easier touch interaction.
2. Mobile apps generally have fewer screen elements visible at once compared to desktop versions, allowing for a more streamlined user experience.

A type of desktop computer that results from convergence is an all-in-one computer, which integrates the monitor and computing components into a single unit.

1. Check and clean any residue on the optical sensor to ensure proper tracking.
2. Adjust the mouse pointer settings or sensitivity in the operating system to improve stability.

1. Most data and software are now available for download, reducing the need for physical media like CDs or DVDs.
2. Opting for lighter, slimmer designs has led manufacturers to eliminate the optical drive to save space and weight.

1. NFC can be used for contactless payments, allowing users to make transactions by simply tapping their phones at a payment terminal.
2. It is also utilized for transferring files between devices, enabling quick sharing of documents or media.

The user should either purchase a license to continue using the software or register the software to activate it and gain full access.

PDF files maintain their formatting across different devices and platforms, ensuring that the document appears the same regardless of where it is opened.

You can convert an office suite document to PDF by using the 'Export' or 'Save As' feature in the software, selecting PDF as the output format.

The different file sizes may arise from factors such as varying content types (e.g., one document might contain an image while the other is text) or different resolutions used during the conversion. Furthermore, if one PDF contains scanned images rather than editable text, a text search would be impossible due to the lack of OCR (Optical Character Recognition) data.

1. Use the search feature available in file management applications, like Windows Explorer or My Computer, to locate the program quickly.
2. Check programs pinned to the taskbar for easy access to frequently used applications.

A POS device finds the price by scanning the barcode of the product, which corresponds to a database where prices and product details are stored. It retrieves and displays the price on the screen.

1. Extra RAM slots allow for additional memory to be installed easily.
2. A replaceable battery provides convenience for maintaining power efficiency over time.

1. A VR headset, such as a head-mounted display, to provide immersive visual experiences.
2. Motion controllers or gloves that allow interaction with the virtual environment.

One way VR can be used is for training simulations, providing users with realistic scenarios for practice in fields like medicine or aviation.