Basic computer operations (hardware and software)

The governing concept is safe software use and protection of digital security. An application from an unknown or untrusted source may contain malware, spyware, or code that accesses private information, damages files, or misuses accounts. The other choices describe benefits that are not guaranteed and are unrelated to safe installation. Therefore, option A identifies the main and realistic risk.

The governing concept is information security and the human role in protecting confidentiality. Choosing the wrong recipient is a human error, and sending confidential material to that person can disclose protected information. The incident may require checking procedures, recipients, and access controls. Hardware manufacturing, entertainment, and data compression do not explain the accidental disclosure, so option B is the correct category.

The input-process-output model explains the situation: if the input is correct but the output is wrong, the fault may lie in the processing stage. A faulty rule, formula, algorithm, program instruction, or software defect can transform valid data into an incorrect result, so option B is correct. Viewing the screen is not a processing fault, data is not always wrong, and a network is not automatically the cause.

The governing concept is the role of system software in hardware communication. A device driver translates or manages instructions so that the operating system can communicate correctly with a particular printer, keyboard, display, or other device. Thus option C is correct. A spreadsheet performs calculations, presentation software creates slides, and a web browser accesses websites; these are application programs rather than hardware-control drivers.

The governing concept is device installation and driver compatibility. A newly connected printer may not operate if its suitable device driver is missing, incorrect, or not recognized by the operating system. Therefore option D is a valid likely cause, although cable, power, and settings should also be checked during troubleshooting. Folder-name length, screen colour, and a pressed mouse button do not normally prevent the printer driver from communicating with the printer.

The governing concept is the distinction between system software and application software. An operating system is system software because it manages hardware resources, provides basic services, and supports other programs. Therefore option B is correct. An image editor, word processor, and media player are application programs designed for specific user tasks; they run with the support of system software rather than controlling the whole computer’s basic operation.

The governing concept is basic computer security. An unknown file may contain malware, and unusual behavior such as repeated pop-ups, unexpected slowdowns, or unfamiliar messages can indicate infection. Running an antivirus scan is therefore most appropriate in situation B; the scan can detect or quarantine threats. A clean screen, paper in a printer, or a new mouse does not by itself provide a reason to scan for malware.

The governing concept is software maintenance. Updates may repair security vulnerabilities, correct errors, improve compatibility, and sometimes add or refine features. Installing trusted updates regularly therefore improves both security and functionality, making C correct. Updates do not physically increase a computer's weight, alter the monitor's size, or normally change the keyboard's colour. Users should obtain them from the official software source.

The governing concept is safe shutdown and data integrity. Directly cutting power stops the operating system before it can close files, write cached information, or complete storage operations. As a result, unsaved work may be lost and file-system data may become corrupted, so C is correct. It does not make the screen larger, change the mouse's weight, or erase keyboard lettering. The proper shutdown command should be used whenever possible.

The governing concept is cursor-based text editing. Backspace normally removes the character immediately to the left of the cursor, while Delete normally removes the character immediately to the right. Their exact behavior can vary in special selections or fields, but this is the standard distinction taught for text entry. The other options describe neither key, so option D is correct.

The governing concept is safe device removal and data integrity. An operating system may still be writing cached or pending information to a USB drive or other external storage. The safely remove command completes or stops those operations and then releases the device, reducing the chance of corrupted files or damaged file-system information. It has no effect on screen size, mouse speed, or speaker volume, so option A is correct.

The governing concept is storage-media preparation. Formatting creates or prepares a file system so that an operating system can organize, locate, read, and write files on the device. Formatting often removes existing data, although some procedures differ in how completely they overwrite it, so important files must be backed up first. It does not change physical color or weight and does not connect a device to a screen; therefore option B is correct.

The governing concept is basic troubleshooting. If possible, save open work and restart the computer, because a restart clears temporary software states and may resolve a short-lived freeze. It is not a guaranteed repair; if the problem returns, the user should check available memory, overheating, updates, malware, or faulty software and seek help when needed. Water, cut cables, and printer paper are unrelated and unsafe responses, so option A is correct.

The governing concept is operating-system process management. Task Manager displays running applications and processes and can help identify a program that is using excessive resources or has stopped responding. A user may carefully select that application and end its task, although unsaved work can be lost. It is not a tool for replacing printer paper, cleaning a keyboard, or turning on a speaker, so option B is correct.

The governing concept is volatile memory. RAM stores active instructions and data only while electrical power is continuously supplied. When power stops, the electronic states representing that temporary information are not maintained, so unsaved work is generally lost. RAM does not store only pictures and is not an output device. Permanent or non-volatile storage, such as an SSD or hard drive, is designed to retain data without power. Hence, option B is correct.

The governing concept is software installation. An application depends on program files, libraries, configuration information, and sometimes supporting components. If these required files are missing, the program may fail to open or operate correctly, so it may need to be installed or reinstalled using a trusted installer. Replacing the monitor, removing the keyboard, or changing a folder colour does not supply application files. Therefore, option B is correct.

A frozen program may be experiencing a temporary software fault. The safest first response is to close the affected program using the normal close command, save work if possible, and reopen it; this may clear the temporary condition without damaging files. Therefore option D is correct. Pulling the power cable can cause data loss, pouring water is dangerous, and deleting files is unrelated and destructive.

A USB drive may still be writing cached data even after a user finishes a visible action. Safely Remove allows pending operations to finish and releases the device before it is unplugged, reducing the chance of incomplete files or file-system corruption. Therefore option C is correct. It does not change colour, restart the computer, or delete every file.

Basic troubleshooting begins with checks directly related to the failed function. Confirm that the printer is connected, selected as the correct device, has paper and ink or toner, and that no job is paused or stuck in the print queue. Thus option D is the best answer. Monitor brightness, mouse scrolling, and wallpaper do not control whether a print job reaches the printer.

The governing concept is the difference between power-saving and complete system closure. Sleep places the computer in a low-power state while preserving the current session in memory, allowing quick resumption. Shut down closes the operating system and powers the computer off. Therefore option D is correct; the other choices either confuse the two states or make false claims about deleting files.

The governing concept is the effect of limited storage capacity. When a hard disk is nearly full, there may be insufficient space for new files, temporary data, updates, or virtual-memory activity. Consequently, saving can fail and some operations may become slower. Option D is correct. A full disk does not automatically stop the monitor, transform hardware into software, or erase mouse buttons.

The governing concept is file permission. A read-only setting allows a user or program to view a file while restricting ordinary editing or saving of changes, depending on the system and permissions. Consequently, option C is correct because it helps protect content from accidental or unwanted modification. It does not delete the file, double its size, or limit it to a printer, so A, B, and D are false.

The governing concept is the role of system date and time in records and digital communication. Operating systems attach timestamps to created, modified, and accessed files, while some online services use correct time for certificates, sessions, or synchronisation. Therefore, option D is correct. An incorrect clock does not normally change monitor colours, disable the mouse, or erase keyboard letters, making A, B, and C implausible.

The governing concept is process and resource management. A task manager displays running applications or processes and often shows their resource use, such as processor or memory usage. It can also help close a program that has stopped responding, so option A is correct. Scanning paper requires a scanner application, renaming belongs to file management, and recording sound uses audio software; therefore B, C, and D are different tasks.

RAM is the computer’s short-term working memory for programs and active data. When available RAM is insufficient, the operating system may rely more heavily on slower storage or manage active programs less efficiently, so multitasking can become slow or unresponsive. Low RAM does not increase printer ink, enlarge the monitor, or rename files. Therefore, option D is correct.