Basic computer operations (hardware and software)

The governing concept is the purpose of a computer port. A USB port provides a standard connection through which compatible external devices, such as a pen drive, keyboard, mouse, or printer, can exchange data and sometimes receive power. Therefore, option D is correct. Screen brightness, holding paper, and connecting a table are not functions of a USB port.

The governing concept is computer security software. Antivirus programs scan files, applications, and sometimes incoming data for malware, then warn the user, quarantine threats, or remove them according to their capabilities. Therefore, option A is correct. Printing is handled by a printer and print software, mouse speed is a settings issue, and folders are managed by the operating system’s file tools.

The governing concept is software installation. Installing means placing the required program files on a computer and configuring the system so the application can run, often through an installation wizard. Therefore, option B is correct. Deleting removes files, scanning checks data for information or threats, and renaming changes a file or folder’s label; none of those actions adds a usable program to the system.

The governing concept is software removal. Uninstalling uses the operating system or an application’s removal utility to delete the program and its registered components so it is no longer available as an installed application. Therefore, option C is correct. Saving preserves information, copying creates a duplicate, and pasting places copied content elsewhere; none of these removes installed software from the computer.

The governing concept is safe program handling. A program may be temporarily busy or processing a task, so waiting briefly may allow it to respond. If it remains unresponsive, use the program’s Close option or the operating system’s safe close command. Option D is correct because it avoids unnecessary data loss or hardware risk; pulling power, pouring water, or deleting files are unsafe and unrelated actions.

The governing concept is data protection through regular saving. Saving writes the latest changes to the storage device, so a power failure, system crash, or accidental closure is less likely to erase completed work. Option A is correct because it directly describes reduced data-loss risk. Saving does not change monitor size, clean a keyboard, or increase internet speed, so options B, C, and D are distractors.

The governing concept is the interdependence of hardware and software. Hardware includes physical parts such as the keyboard, processor, and monitor, while software consists of programs and instructions. Software tells hardware what tasks to perform, and hardware provides the means to execute them. Option B is correct; A denies their relationship, C reverses their physical nature, and D makes a false claim.

The governing concept is navigating content within a window. A scroll bar shows that a page or window contains more material than can fit in the visible area. Dragging its thumb, clicking its arrows, or using a mouse wheel moves the view upward or downward. Option C is correct. A title bar identifies the window, an icon represents an item, and a menu button opens commands.

The governing concept is software installation management. Uninstalling is the controlled process of removing a program and, when supported by the software, its associated components from the computer. Option D is correct. Installing adds software, scanning checks files or systems for information or threats, and booting starts the computer or operating system. These alternatives do not mean removing an installed program.

The governing concept is software installation. Installing copies the required program files to suitable storage locations, may configure settings or shortcuts, and prepares the software for use by the operating system. Option A is correct. Restoring returns data or settings to an earlier state, renaming changes a label, and scrolling changes the visible part of a page; none of these adds new software.

The governing concept is text entry in a document. A cursor, usually shown as a blinking vertical line, marks the insertion point, so the next typed character appears there. Therefore, option B is correct. It is different from the mouse pointer, which moves around the screen and is used for pointing, clicking, or selecting; the other options describe unrelated hardware or storage information.

The governing concept is mouse-based text selection. The user places the pointer at one end of the required text, holds the primary mouse button, and drags across the words; releasing the button leaves the text highlighted. Thus, option C is correct. Right-clicking normally opens a context menu rather than selecting a continuous passage, while switching off the mouse or screen cannot select text.

The governing concept is navigation within a window or document. Rolling the mouse wheel moves the visible content vertically, allowing the user to read a long page by going upward or downward without repeatedly pressing the scrollbar. Therefore, option D is correct. Printing requires a printer command, starting the computer uses a power control, and renaming a file uses a file-management command.

The governing concept is the difference between physical and digital information. A hard copy is a physical version of computer information, commonly produced on paper by a printer, so option A is correct. A soft copy remains in digital form on a screen or storage device. A folder organizes files, and an icon is a small visual symbol representing a file, application, or command.

The governing concept is digital versus physical output. A soft copy is information stored electronically and viewed on a monitor or another digital device without being printed, so option B is correct. A hard copy, paper copy, and printout are physical versions produced on paper. The deciding clue is that the question describes a screen-viewed digital copy rather than a printed one.

The governing concept is system power management. The Restart command closes the current operating session and then starts the computer again, usually without requiring a separate manual power-on step. Therefore, option C is correct. Copy duplicates selected information, Paste inserts copied or cut information, and Rename changes a file or folder name; none of those commands starts the system again.

The governing concept is temporary power saving. Sleep mode places the computer in a low-power state while retaining the active session in memory, so pressing a key or moving the mouse can usually resume work quickly. Thus, option D is correct. Print creates paper output, Delete removes selected data, and Scan captures information; none of these changes the computer to a low-power state.

The governing concept is software classification by purpose. A calculator application is a program designed for a user-specific task—performing numerical calculations—so it is application software and option C is correct. System software manages hardware and provides the platform for applications, while an input device and a storage device are physical hardware categories, not software types.

The governing concept is user authentication and session access. Logging in means entering the correct account, usually by providing a username, password, PIN, or another verification method, so that the system can open the permitted files and settings. Logging out ends that session, shutting down turns off the computer, and uninstalling removes software. Therefore, option A is correct.

The governing concept is ending an authenticated user session securely. Logging out closes the current account session and helps prevent the next person from opening private files or changing account settings. Logging in starts a session, restarting reloads the computer, and installing adds software. Since the question asks about leaving an account after work, option B, Log out, is correct.

The governing concept is the computer start-up sequence. During booting, firmware and start-up instructions help locate and load the operating system into main memory so that the computer can accept commands and run applications. Option A is correct. Formatting prepares a storage device, scanning checks for information or threats, and compiling translates program code; none of these names the normal operating-system loading process.

The governing concept is basic performance troubleshooting. Open applications may consume RAM, processor time, or other resources even when they are not currently being used. Closing unnecessary applications is therefore a sensible first, low-risk step, making option B correct. Replacing the monitor, disconnecting the keyboard, or switching on a printer does not normally address the cause of slow processing.

The governing concept is the purpose of application software. Spreadsheet programs organize information in rows and columns, allow users to enter values in cells, and perform calculations with formulas and functions. Therefore, creating tables and calculations is the correct choice, C. Scanning pictures belongs to an image-scanning tool, recording video needs a camera application, and shutting down is an operating-system function.

The governing operating-system concept is multitasking. The operating system allocates processor time, memory, and other resources so that several applications can remain active and appear to run at the same time. Thus D, multitasking, is correct. Formatting prepares storage, scanning captures information from a source, and printing produces a paper or other output; none describes simultaneous application use. Too many programs may reduce performance.

The governing concept is the use of keyboard shortcuts for common commands. Ctrl+P opens the Print dialog, where the user can select a printer, pages, copies, and other settings before confirming the job. Ctrl+C copies selected content, Ctrl+X cuts it, and Ctrl+V pastes copied or cut content. Therefore, option A is the only correct answer.