Health Safety and Security at Workplace

Permissions determine whether users can view, edit, delete, or manage items in a shared folder. If students can edit despite needing read-only access, the folder or file permission is probably too broad and should be changed to view-only. Mouse speed, brightness, and print colour do not control editing rights, so A is correct.

A network that connects computers within a small geographical area, such as one room, building, school, or office, is called a Local Area Network (LAN). Because the computers in the question share files inside one building, LAN is the correct answer. Email is a communication service, while Recycle Bin and security scanning are not network types.

Cloud storage is protected through an online account. If its password is short, common, or easy to guess, an unauthorised person may enter the account and view, copy, change, or delete stored files. A weak password does not mechanically damage a mouse, printer, or monitor; those options are unrelated to account security.

A backup is useful only when it provides an independent copy that can survive a failure affecting the original. If both the original and backup are stored on the stolen device, one theft can remove both copies. Keep another copy on a separate device or secure location and test that it can be restored.

Unsaved work is commonly held temporarily in main memory while an application is running. Volatile memory loses its contents when power is removed, so unsaved changes may disappear. Saving frequently writes the work to permanent storage, such as a drive, where it can remain after shutdown.

A payment PIN is confidential and should not be disclosed to callers, even when they create urgency or claim to be protecting an account. Such a request may be a fraud attempt. End the call, avoid using contact details supplied by the caller, and verify through the bank or payment service’s official app, website, or helpline. Therefore, D is safest.

A digital payment receipt records details that help identify and verify a transaction. The amount shows how much money was involved, the date or time places the transaction in sequence, and the receiver or merchant details show where it was sent. These records can help resolve mistakes or disputes. Mouse colour, chair height, and monitor brightness provide no transaction evidence.

A photograph can identify a person and may reveal their location, activity, or personal circumstances. Sharing it with a group without consent can interfere with that person's privacy and may cause embarrassment or harm. Asking permission first, considering the audience, and removing sensitive details are responsible digital practices.

Long computer use is safer when the screen is positioned comfortably, the back and neck are supported, the feet are stable, and the user takes regular short breaks to look away and move. Sitting too close, ignoring chair height, or working continuously can increase eye, neck, shoulder, and back strain.

Using several character types increases the number of possible combinations and makes simple guessing or automated cracking harder, especially when the password is also long and unique. Complexity alone is not enough: a long memorable passphrase can be strong too. The password should never be shared or reused across important accounts.

Two-factor authentication requires a password plus another independent proof of identity, such as a code from an authenticator, a security key, or a suitable biometric factor. If a password is stolen, the second factor can still block access. It does not change colors, disable the internet, or delete files.

A Local Area Network connects devices within a limited geographical area such as a room, laboratory, school building, or office. Computers in one school laboratory fit this definition. The global Internet and networks spanning countries cover much larger areas and are examples of wide-area or global networking rather than a single LAN.

Privacy settings let a user manage the visibility of profile details, posts, photos, location, and other information on a digital service. They can limit an audience to selected people or contacts, although no setting should be treated as a guarantee against every screenshot or misuse. Hardware battery, keyboard color, and printer ink are unrelated functions.

Cloud storage keeps files on remote servers managed through an online service. With suitable access, a user can reach those files from different devices or locations through the Internet. This benefit depends on connectivity and account permission, and it does not remove every risk; strong authentication, access control, and independent backups may still be needed.

Data may be lost because of accidental deletion, hardware failure, theft, malware, or an incorrect change. A regular backup creates a separate recoverable copy, so important work can be restored after such an event. Backups should be stored separately, updated often enough for the work, and occasionally checked to ensure restoration is possible.

Before sending an attachment, verify the recipient, file name, contents, and size. This prevents accidental disclosure, wrong-file delivery, and avoidable delivery problems. Sensitive information should be shared only with authorized people and protected by suitable means; passwords should never be exposed in the message. The other actions increase privacy or security risks.

Muting the microphone when not speaking prevents background sounds such as traffic, typing, or household activity from disturbing the meeting. A participant should unmute before answering or presenting and mute again afterward. Thus, the practice improves clarity and meeting etiquette; the other situations require the microphone to be available for speech.

The class chat should support learning and respectful communication. Topic-related questions, answers, and requests for clarification help the teacher and classmates, while repeated irrelevant messages create noise. Personal information should remain private, and mocking others is harmful and disrespectful. Therefore, A demonstrates useful and responsible digital behaviour.

Public Wi-Fi may be poorly secured or impersonated, so sensitive activities can expose credentials if the connection or device is compromised. Entering a banking password has serious financial consequences and should preferably be done through a trusted network and secure connection. Reading ordinary public information generally reveals far less sensitive data, although normal online caution remains necessary.

Software updates may fix programming errors, improve compatibility, and close security weaknesses that attackers could exploit. They should be obtained through the official application, operating system, or another trusted source, because an unknown download may itself contain malware. Updating does not remove passwords or hide files; its main value here is improved reliability and security.

A proper shutdown gives the operating system time to save pending data, close files, stop processes, and safely power down hardware. Turning off power suddenly may lose unsaved work and, in some cases, leave files or the file system damaged. Therefore, users should save their work and use the system’s shutdown command rather than simply disconnecting power.

A paper jam should be handled according to the printer manual. Stop the print job, switch off or unplug the printer when the instructions require it, allow hot parts to cool, open the indicated access area, and remove paper gently in the recommended direction. Forceful pulling can tear paper or damage rollers, while water is an electrical hazard.

Accessibility features reduce barriers so people with different physical, sensory, or learning needs can use digital systems more effectively. Examples include screen readers, magnification, captions, high-contrast settings, keyboard navigation, and speech input. These tools do not exist to hide files, destroy networks, or merely increase game speed; their purpose is inclusive access.

Good ergonomics includes sitting with back supported, keeping the screen at a comfortable height and distance, positioning hands naturally, and taking short regular breaks to rest the eyes and muscles. Looking continuously can cause strain, water near electrical cables is dangerous, and an unstable chair can cause injury. Therefore, A is the safe practice.

A browser cookie is a small piece of data that a website or service stores in the browser. It may help remember preferences, maintain a session, or support site functions; different cookies have different purposes. Cookies are not automatically viruses, but some tracking cookies can raise privacy concerns, so users should review permissions and browser settings.