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Open days at schools are used to take learners on tours where they can see the facilities of the institution - NSC Information Technology - Question 6 - 2023 - Paper 2
Question 6
Open days at schools are used to take learners on tours where they can see the facilities of the institution. 6.1 Registration for an open-day event at a school tak... show full transcript
Worked Solution & Example Answer:Open days at schools are used to take learners on tours where they can see the facilities of the institution - NSC Information Technology - Question 6 - 2023 - Paper 2
Step 1
6.1.1 Explain what a QR code is and how it can be captured.
Answer
A QR code, or Quick Response code, is a two-dimensional barcode that can store information such as URLs, text, and other data. It can be captured using a digital camera or smartphone equipped with a QR code scanner app. When the code is scanned, the information contained in the code is quickly decoded and displayed to the user, often directing them to a specific webpage or application.
Step 2
6.1.2 When completing a form online, it often happens that personal information, such as your e-mail address, is automatically entered into the fields. How does that happen?
Answer
This automatic entry of personal information occurs through features like autofill, which is often enabled in web browsers. When a user enters their details into forms on various websites, the browser stores this information in cookies or local storage. Consequently, when the same user revisits a form, the browser retrieves the saved information and populates the fields automatically.
Step 3
6.2.1 Explain what multiprocessing is.
Answer
Multiprocessing refers to the ability of an operating system to execute multiple processes simultaneously. This is achieved through the allocation of tasks across multiple CPU cores, allowing several programs or threads to run at the same time. This enhances efficiency and performance, as the system can handle more tasks concurrently without slowing down.
Step 4
6.2.2(b) Discuss how the different processes are managed by the operating system to ensure that all applications will have adequate resources.
Answer
The operating system manages different processes using a method known as process scheduling, which allocates CPU time and memory to each running process. It ensures that each application gets its required share of system resources by prioritizing tasks and preventing any single process from monopolizing the CPU or memory. Additionally, resources such as RAM and storage are dynamically allocated based on current demand, allowing for efficient multitasking.
Step 5
6.2.2.1 Explain the process of web-caching.
Answer
Web caching involves storing copies of web pages and their resources locally on a user's device or on an intermediary server. When a user visits a website, instead of downloading all the data from the server again, the browser can retrieve the data from the cache. This process reduces load times, conserves bandwidth, and enhances user experience by providing faster access to frequently visited sites.
Step 6
6.2.2.3 Discuss the increased use of streaming material rather than downloading.
Answer
Streaming allows users to access media content in real-time over the internet without the need to download large files, providing immediate access. Unlike downloading, which requires storage space and time for the complete file to be saved locally, streaming facilitates a more efficient use of resources. It depends on a stable internet connection but reduces the risks of storage constraints and allows for a wider variety of content to be consumed flexibly.
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Step 9
6.4.1 Discuss why the data above might compromise the quality of input data.
Answer
The data variations displayed above may compromise quality due to the presence of inconsistent formats (e.g., '7' vs. 'seven'). Such discrepancies complicate data analysis and make it challenging to group or compare records. Additionally, incorrect data entry can occur due to user error, leading to inaccuracies and difficulty in retrieving reliable information.
Step 10
6.4.2 State TWO different techniques on how the form, in which the data is captured, could be optimised to prevent this type of input.
Answer
- Using dropdown lists or combo boxes to limit user input options and reduce the likelihood of errors.
- Implementing input masks to guide the user in providing the correct format (e.g., date formats) to discourage incorrect entries.
Step 11
6.5.1 Why would a distributed database be a more suitable option for this scenario?
Answer
A distributed database can accommodate multiple users and requires access from various locations, making it ideal for a school needing to handle data across different campuses or departments. Furthermore, distributed databases enhance performance by distributing processing loads and minimize the risk of data loss through redundancy.
Step 12
6.5.2 Briefly explain how encryption works.
Answer
Encryption is the process of converting data into a coded format to prevent unauthorized access. This is typically achieved using algorithms that transform readable data into a scrambled format using a specific key. Only parties with the appropriate decryption key can revert the data back to its original form, thus preserving confidentiality during transmission over public networks.
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6.6.2 Which policy document can be used as motivation for the need to take disciplinary action against the perpetrator?
Answer
The Acceptable Usage Policy (AUP) can be referenced, as it outlines the acceptable standards for user behavior in relation to data privacy and confidentiality within the school environment.
Step 15
6.7 State TWO potential risks associated with the use of ChatGPT.
Answer
- Misinformation: Users may rely on the generated information without fact-checking, leading to the spread of incorrect information.
- Privacy concerns: Confidential data could be inadvertently shared during interactions, raising concerns about data security and personal privacy.