Using an operating system and file management

Correct answer: C. Keeping personal files, settings, and permissions separate

Explanation: Separate user accounts support privacy, security, and personalization. Each account can have its own files, desktop settings, password, and permissions, while an administrator can restrict access to protected resources. A common password weakens separation, account management cannot increase physical disk capacity, and it does not directly save printer ink. Thus, option C gives the main benefit.

Correct answer: A. When a shared computer must be handed to the next user

Explanation: Locking protects the current session temporarily while the same user expects to return. Logging out ends that session and returns the computer to a sign-in screen, making it more appropriate when a shared computer is being handed to another person who needs a separate account. Minimising a window or searching for a file does not require either action, so A is correct.

Correct answer: B. Sleep keeps the session in RAM while Hibernate writes it to storage

Explanation: The governing concept is how an operating system preserves an active session during reduced power use. Sleep keeps the session in RAM, so the computer resumes quickly but still needs some power. Hibernate saves the session state to storage and then uses almost no power, allowing recovery after a complete shutdown. Therefore, option B is correct; the other options incorrectly describe data deletion, printers, or removal of the operating system.

Correct answer: C. Hibernate

Explanation: The governing concept is persistence of the computer session during power loss. Hibernate copies the current memory session, including the working state of applications, to storage before powering down. Because storage is non-volatile, the session can normally be restored after the computer has been completely switched off. Thus option C is correct. Minimise only changes a window, Lock protects access, and Refresh reloads or updates a view without preserving the whole session.

Correct answer: D. To replace system files currently in use with updated versions

Explanation: The governing concept is safe replacement of files used by the operating system. During an active session, important system libraries, drivers, or services may be locked because they are currently running. A restart stops those processes and loads the newly installed versions during boot. Therefore option D is correct. Mouse colour, file-name length, and printer speed are unrelated to the normal reason for an update restart.

Correct answer: A. The highest-level directory of a drive

Explanation: The governing concept is the hierarchical organisation of files and folders. A root directory is the starting, highest-level location of a drive or file-system tree; all ordinary folders and files are reached through branches beneath it. On many systems it is represented by a drive root such as C:\. Hence option A is correct. File size, Recycle Bin order, and taskbar icons do not define a root directory.

Correct answer: B. An absolute path gives the complete route from the root while a relative path is based on the current location

Explanation: The governing concept is the reference point used to locate a file. An absolute path starts at a fixed root or drive and identifies the complete location independently of the current folder. A relative path describes the route from the current working folder, so the same text can identify different locations in different contexts. Therefore option B is correct; the other choices make false universal claims about paths.

Correct answer: C. The old path stored in the shortcut no longer points to the correct location

Explanation: The governing concept is that a shortcut is a reference to another item, not a duplicate of that item. It normally stores the target file’s path or location. When the original file is moved without updating the shortcut, the stored path points to the old location and the operating system cannot find the target. Therefore option C is correct; file size, monitor resolution, and the shortcut’s identity do not cause this broken link.

Correct answer: D. A harmful executable file may appear to be a document

Explanation: The governing concept is that a file extension helps reveal the file type and the action the operating system may perform when it is opened. If extensions are hidden, a malicious executable may be given a misleading name and appear to be an ordinary document, increasing the chance of accidental execution. Thus option D is correct. Folder colour, printer behaviour, and mouse speed are unrelated security effects.

Correct answer: B. A hidden file still exists but is not shown normally while a deleted file has been removed from its location

Explanation: The governing concept is the difference between visibility and existence. Applying a hidden attribute normally leaves the file in its location with its contents intact, although ordinary folder views may not display it. Deletion removes the directory entry or moves the item to a recovery area such as the Recycle Bin, depending on the operation. Therefore option B is correct; hidden does not mean empty or permanently erased.

Correct answer: C. Controlling who can read, modify, or execute the file

Explanation: The governing concept is access control. File permissions specify which users or groups may read contents, write or modify them, and execute the file when execution is supported. Applying least privilege helps protect privacy, prevent accidental changes, and reduce unauthorised activity. Therefore option C is correct. Permissions do not set colours, compress data, or directly increase printer speed; those are separate functions.

Correct answer: D. View the file but normally cannot save changes to it

Explanation: The governing concept is separation of file permissions. Read permission allows a user to open or view the file’s contents, while write permission is needed to alter and save those contents. Without write access, the user may be able to read the file but cannot normally commit modifications. Therefore option D is correct. Deleting, changing ownership, or changing permissions generally requires additional privileges and is not implied by read permission.

Correct answer: A. Which user or account has primary control over the file

Explanation: File ownership is an operating-system concept that identifies the user or account having primary control over a file. The owner can often view or change permissions and decide who may access, edit, or share it, subject to administrator rules. Therefore option A is correct; colour, opening speed, and printer choice are file attributes or actions, not ownership.

Correct answer: B. The old file may be overwritten by the new file

Explanation: In file management, choosing Replace resolves a same-name conflict by putting the incoming file in the destination in place of the existing version. The older contents may therefore be overwritten, depending on the operating system and confirmation settings. Option B is correct. Files do not automatically merge, change extension, or lock the computer merely because Replace is selected.

Correct answer: C. The older version can be recovered if the change is wrong

Explanation: A backup is a separate copy preserved before a risky file operation. If overwriting removes important information or the new version contains an error, the saved copy can be used to restore the earlier version. Thus option C is correct. A backup does not alter monitor size, file colour, or the permanent nature of RAM; those choices are unrelated to data recovery.

Correct answer: D. Clipboard contents may be lost and the move will not be completed

Explanation: Cut-and-paste uses a temporary clipboard state to remember the selected item and its intended move. If the computer shuts down before Paste completes, that temporary information may be cleared, so the move may not finish as expected. Option D describes the risk. The file does not automatically duplicate, double in size, or change format merely because shutdown occurs.

Correct answer: A. Drag while holding the copy modifier key

Explanation: Drag-and-drop behavior depends on the source and destination. Within the same drive, ordinary dragging commonly moves the item rather than copying it. Holding the operating system’s copy modifier, commonly the Ctrl key in Windows, can request a duplicate; the pointer indicator should be checked. Therefore option A is correct, while the other actions do not create a copy.

Correct answer: B. A compressed file may reduce content size in one package and may require extraction before use

Explanation: A compressed file or archive packages one or more files and may reduce their combined storage size by removing repeated patterns. It can also make sharing easier, but some programs require the archive to be extracted before individual contents can be used. Option B is correct. A normal folder organizes files without necessarily compressing them, and archives can contain many file types, not only audio.

Correct answer: D. One or more contained files may not be extracted correctly

Explanation: An archive contains structural information needed to read and extract its packaged files. Corruption can damage that information or part of the stored data, causing the archive to fail to open or causing one or more files to extract incompletely or incorrectly. Option D is correct. Archive damage does not control monitor brightness, mouse direction, or printer ink.

Correct answer: A. A complete copy of all selected files is available for recovery

Explanation: A full backup copies all selected files at the time the backup is made. Its main advantage is simpler recovery because the complete selected data is available in one backup set, rather than requiring many earlier sets. Option A is correct. The trade-off is that a full backup usually needs more storage and time; it does not delete originals or save only one changed file.

Correct answer: B. Backing up files changed since the previous backup

Explanation: An incremental backup stores data that is new or changed since the immediately preceding backup, whether that preceding backup was full or incremental. This reduces backup time and storage use, although recovery may require the full backup plus the relevant incremental sets in sequence. Option B is correct; the other choices confuse incremental backup with full backup or unrelated file types.

Correct answer: C. Reducing the risk of losing both the original and backup when the original device fails

Explanation: Backup independence is a core data-protection principle: copies should not depend on the same physical failure point. If the original drive is damaged, lost, infected, or inaccessible, a backup stored on a separate device is more likely to remain available. Option C is correct. File colours, monitor quality, and printer speed are unrelated to protection against hardware loss.

Correct answer: D. Test it by restoring a sample file

Explanation: The governing concept is backup verification: a backup is useful only when its data can be read and restored. Restoring a sample file checks both accessibility and practical usability without risking the entire backup. Merely seeing a name or size does not prove that the contents are intact, and the Recycle Bin is unrelated to backup validation. Therefore, option D is correct.

Correct answer: A. Making its contents unreadable to unauthorised persons

Explanation: The governing concept is confidentiality through encryption. Encryption transforms readable information into coded text so that an unauthorised person cannot understand it without the correct key or password. It does not delete the file, rename it, or guarantee that its size becomes smaller. Compression is a different process concerned mainly with storage size. Thus, option A is correct.

Correct answer: B. A password may control access to an encryption key but a weak password reduces security

Explanation: The governing concept is layered data protection. Encryption protects the content by using a cryptographic key, while a password can help control access to that key or encrypted file. If the password is short, common, or reused, an attacker may guess it and weaken the protection. File size, file names, and unrelated system actions do not explain this relationship, so option B is correct.