Basic computer operations (hardware and software)

A software licence is a legal and technical agreement that states how software may be installed, used, copied, modified, or shared. Its terms may specify the number of devices or permitted users and any restrictions. It does not clean hardware, determine monitor dimensions, or automatically print files. Understanding the licence supports responsible and lawful software use, so option A is correct.

The governing concept is system software and hardware communication. A device driver provides the instructions or interface that allows an operating system to identify and control a particular device, such as a printer, so option D is correct. A browser opens websites, a spreadsheet handles tabular data and calculations, and a game is application software; none primarily connects hardware with the operating system.

The governing concept is safe and compatible software installation. Before installing, verify that the download comes from a trusted or authorised source and check whether the computer meets the software’s operating-system, memory, and storage requirements; therefore option B is correct. Unknown downloads may contain malware, disabling security increases risk, and sharing a password is unsafe and irrelevant.

The governing concept is driver-based hardware installation. The operating system may need a suitable printer driver so it can identify the printer, exchange commands, and use functions such as printing and status reporting; therefore option C is correct. A monitor and speakers do not establish printer communication, while a mouse pad only supports physical mouse movement and has no software role.

The governing concept is operating-system power control. Restart closes the active operating-system session and then loads it again automatically, so the computer starts afresh without requiring a separate manual power-off and power-on. Log out only ends the user session, Sleep temporarily lowers power while preserving the session, and Lock protects access without restarting the system. Therefore, option A is correct.

The governing concept is user-session management in an operating system. Log out ends the currently active user's session and returns the computer to a sign-in or user-selection screen, while the computer itself remains powered on. Shut down turns the system off, Restart reloads the operating system, and Hibernate saves the session before entering a deeper power-saving state. Therefore, option B is correct.

The governing concept is power management. Sleep places the computer in a temporary low-power state while keeping the current session and open work available in memory, allowing a quick return when the user resumes. Delete removes content, Save stores data, and Print produces a paper or print-file copy; none of these changes the computer's power state. Therefore, option C is correct.

The governing concept is basic computer security and access control. Locking the computer keeps the current programs and files open but requires the user's password, PIN, or another authentication method before access is restored. Turning off the internet does not prevent someone nearby from using local files, reducing brightness is unrelated, and renaming a file provides no protection. Therefore, option D is correct.

The governing concept is keyboard input. The Enter key creates a new paragraph or line in many text fields and confirms a selected command, menu choice, or form entry. Shift changes the case or produces an upper symbol while held, Caps Lock toggles continuous uppercase typing, and Tab moves focus or inserts an indentation. Therefore, option A is correct.

The governing concept is text editing with keyboard keys. Backspace removes the character immediately to the left of the insertion cursor, so it is useful for correcting text that has just been typed. Delete normally removes the character to the right or a selected item, Escape cancels or exits an operation, and Spacebar inserts a blank space. Therefore, option B is correct.

The governing concept is directional text editing. When the cursor is between characters, the Delete key removes the character immediately to its right; it can also remove selected text or an item in many applications. Shift changes selection or character input, Home moves the cursor toward the beginning of a line, and End moves it toward the end. Therefore, option C is correct.

The governing concept is keyboard mode control. Caps Lock is a toggle key: after it is activated, alphabetic letters are typed in uppercase continuously until the key is pressed again to turn the mode off. Control and Alt modify commands, while Enter confirms input or starts a new line. Shift can type one uppercase letter when held, but it is not the best answer for continuous uppercase typing. Therefore, option D is correct.

The governing concept is the keyboard shortcut system and clipboard workflow. Ctrl+C copies the selected text, file, or object to the clipboard while leaving the original content in its place. Ctrl+X cuts and removes the selection, Ctrl+V pastes clipboard content, and Ctrl+P generally opens printing. Therefore, the shortcut described is Control and C, making option A correct.

The governing concept is clipboard-based editing. Ctrl+V takes content previously placed on the clipboard by Copy or Cut and inserts it at the current cursor position or into the selected destination. Ctrl+S saves, Ctrl+Z reverses a recent action, and Ctrl+F opens search. Thus, the shortcut that performs paste is Control and V, so option B is correct.

Option B, utility software, is designed to support computer maintenance and efficient operation. Disk-cleanup tools remove unnecessary files, while compression utilities reduce file size or package files. The other options are mainly used to create presentations, edit documents, or access websites.

The governing concept is software maintenance and cybersecurity. Security updates repair known vulnerabilities, correct errors, and may prevent malware or unauthorised access. Therefore, option A gives the strongest reason to update promptly. A colour-only icon change is cosmetic, a switched-off computer is merely a device state, and deleting files is unrelated to updating software. Updates should be obtained from trusted sources and installed responsibly.

The governing concept is the startup or boot process. Power-On Self-Test, commonly called POST, is performed by firmware immediately after power is switched on to check essential components such as memory and basic input-output hardware. Thus, option A is correct. Disk defragmentation reorganises stored files, compression reduces file size, and system restore returns software settings; none is the initial hardware check.

The governing concept is the boot process. After power-on checks, the computer must locate boot files on a storage device and load the operating system. Therefore, the bootable storage drive and, where relevant, its boot order should be checked first, making option B correct. A speaker, webcam, or printer may affect peripheral functions, but none normally contains or loads the operating system.

The governing concept is boot configuration. During startup, the boot sequence specifies the order in which devices, such as an internal drive or removable media, are checked for valid operating-system files. Thus, option C is correct. Printer speed and screen colour are peripheral or display settings, while renaming a file is an ordinary file-management action and has no role in selecting a startup device.

The governing concept is firmware: specialised low-level software stored in or closely associated with a hardware device. It provides instructions for essential functions such as starting a device and controlling its basic components. Therefore, option D is correct. Firmware is not an online document, a drawing application, or temporary user data. It may be updated, but it is distinct from ordinary user applications.

The governing concept is memory management. When available RAM is insufficient for the programs and data currently needed, the operating system can reserve part of a storage drive and use it as virtual memory. Therefore, option C is correct. This arrangement can keep applications running, but storage is much slower than RAM, so it may reduce performance. Printer, monitor, and mouse conditions are unrelated.

The governing concept is RAM capacity and multitasking. More RAM gives the operating system space to keep more active programs and data readily available, reducing the need to move information to slower storage. Consequently, more applications can often run smoothly at the same time, so option D is correct. A RAM upgrade does not improve printer colour, erase a hard disk, or make an internet plan free; performance also depends on the processor and storage.

The governing concept is hardware–software communication. An operating system sends general instructions, while a device driver translates those instructions into commands that a particular printer, keyboard, display, or other device can understand. Therefore, option C is correct. A driver does not create pictures, increase storage, or permanently shut down the computer; those claims confuse its communication role with unrelated functions.

Task Manager reports how system resources are being used by processes. A very high CPU percentage generally means that one process or several processes are consuming much of the processor’s capacity. This can cause slow responses, so the user can inspect the process list to investigate. Option B is correct; paper quantity, cable length, and brightness do not explain CPU usage.

A physically separate backup follows the principle of keeping data on a different device or location from the working copy. If the main computer is damaged, lost, stolen, infected, or made inaccessible by hardware failure, the separate copy can support recovery. Options A, B, and C concern printing, naming, or display settings and do not improve data resilience. Therefore option D is correct.