Basic computer operations (hardware and software)

System software, such as an operating system, controls hardware, manages memory and files, and provides a platform for other programs. Application software, such as a word processor, is designed for a user task—in this case creating and editing documents. Thus option A correctly contrasts their roles. The other choices confuse software with hardware, assign an overly narrow function, or incorrectly claim that both work identically without an operating system.

Utility software supports the maintenance, protection, and efficient operation of a computer. A disk-cleanup utility can identify unnecessary temporary files and remove them, thereby freeing storage space without serving as the user’s main creative application. Presentation software, a word processor, and a video-calling program are application software because they perform direct user tasks. Therefore option B is the appropriate example of utility software.

The governing distinction is between an application used to access the web and an online service used to locate information. A browser, such as Chrome or Firefox, loads and displays web pages. A search engine, such as Google or Bing, searches an index of web content and returns results. Option B reverses the roles, while C and D wrongly describe both as operating systems or physical devices. Option A is correct.

Keyboard shortcuts are useful when the same commands must be repeated quickly because they reduce pointing, menu selection, and mouse travel. For example, Ctrl+C copies selected content and Ctrl+V pastes it, often in fewer steps. Changing a picture’s colour generally needs an appropriate graphics tool, a printer jam needs physical attention, and shortcuts cannot operate a powered-off computer. Therefore, option A is correct.

The arithmetic logic unit, or ALU, performs arithmetic operations such as addition and comparisons, as well as logical operations. The control unit fetches and interprets instructions, then coordinates their movement and execution. Option C correctly assigns these roles. The other choices incorrectly describe both units as storage or printing devices, which are not their functions.

Data pathways on a motherboard, often discussed as buses or electrical traces, provide routes for digital signals between the CPU, memory, storage interfaces, and other components. They allow instructions and data to be transferred so the system can operate. Option A is correct. The other choices describe printer maintenance, file management, or a network-service decision, not motherboard communication.

An uninterruptible power supply, or UPS, supplies electricity for a limited period after the mains power fails and may also smooth brief voltage changes. Its main practical purpose is to keep the computer running long enough to save work and perform a safe shutdown, reducing data loss and hardware stress. Thus, option D is correct; it is not an internet, CPU, or file-compression device.

The correct answer is A. Software is a collection of programs and instructions that tells the computer hardware how to perform tasks such as entering data, calculating, storing files, or displaying results. Hardware is the physical part and cannot perform useful operations without suitable instructions. Supplying electricity, making a table, and preventing dust are physical or environmental functions, not the role of software.

The correct answer is B. Hardware provides the physical components—such as the processor, memory, keyboard, and display—while software supplies the instructions that control those components. A computer works properly only when both cooperate. Hardware alone has no useful instructions, and software alone has no physical machine to execute it. Internet access can be useful for some tasks but is not required for every computer operation.

Software is a collection of programs and instructions that tells a computer how to perform tasks. It may control hardware, manage files, process information, or help users create documents and perform calculations. A monitor, mouse, and printer are physical hardware devices, not collections of instructions. Therefore option B is correct because software provides the logical directions needed for computer operations.

A printer is an output device that transfers digital text, images, or documents from a computer onto paper. The paper result is called a hard copy. A monitor also gives output, but only as a display on the screen; a mouse and keyboard are input devices used to control or enter information. Since the question asks specifically for a paper copy, option D is correct.

The governing concept is the human-computer system relationship. A user supplies data or instructions, starts or controls tasks, reviews the processed output, and applies the results to a purpose. A user may also manage files and choose suitable software, but generating electricity, manufacturing hardware, or merely connecting cables are specialized activities rather than the essential user role. Therefore, option A is correct.

The governing concept is the difference between system software and application software. A word processor is application software because it performs a specific user task: creating, editing, formatting, and saving documents. System software manages the computer itself, while hardware and network devices are physical equipment. Therefore, option B is correct.

The governing concept is the role of utility software. Antivirus programs scan files and activity, detect or block malicious software, and support computer security and maintenance. They are not input devices, output devices, or storage hardware because they are programs rather than physical equipment. Consequently, option C is the correct category.

The governing concept is hardware-software communication. A device driver is system software that translates operating-system instructions into commands understood by a particular device, such as a printer or graphics card, and can report device status back to the system. A browser, word processor, and presentation program are user applications, so option D is correct.

The governing concept is the distinction between hardware and software. Software consists of programs and instructions that tell computer hardware what tasks to perform, such as calculating, displaying, or storing information. Therefore, option B is correct. A monitor displays results, a mouse provides user input, and a printer produces paper output; none of these supplies the complete set of operating instructions.

The governing concept is backup power. An Uninterruptible Power Supply, or UPS, contains a battery and supplies electricity for a short period when the main power fails. This gives the user time to save files and shut down safely. A modem and router provide communication functions, while a projector displays images; neither is designed to power the computer. Therefore, option D is correct.

The governing concept is communication through signal conversion. A modem, a contraction of modulator-demodulator, converts digital signals from a computer into a form suitable for a communication line and converts incoming signals back into digital form. This enables network or internet connectivity. Printing, scanning, and producing sound are handled by a printer, scanner, and speaker respectively. Therefore, option C is correct.

The governing concept is packet routing. A router examines destination information in data packets and forwards them along an appropriate path between different networks. In a home network, it can also connect several devices and share an internet connection. Printing, recording voice, and displaying images are functions of other peripheral devices. Thus, sending data between networks is the router’s main function, making option D correct.

The governing concept is the relationship between software and hardware. Software consists of programs and instructions that tell the processor and other hardware what operations to perform, such as accepting input, calculating results or displaying output. Thus option A is correct. Software does not create electricity, increase physical weight as its purpose, or manufacture the computer case; those distractors confuse digital instructions with physical components.

The governing concept is cooperation between software instructions and hardware actions. A word processor is software that sends a print command, while the printer is hardware that physically transfers the document onto paper. Therefore, option B correctly shows both working together. A monitor does not calculate independently, and a keyboard or hard disk cannot save or create documents without a computer system and suitable software.

Hardware means the physical components of a computer system that can generally be seen or touched, such as the keyboard, monitor, motherboard, processor, and storage drive. Internet files and user messages are data, while operating-system commands are software instructions. The physical and touchable parts therefore match the governing definition, making option A correct.

Software is the collection of programs, procedures, and instructions that tells computer hardware what tasks to perform. The operating system and applications are examples. Wires, cables, a monitor, printer, motherboard, and processor are physical hardware components rather than software. Consequently, the description in option B correctly states what software means.

The governing concept is software classification. A word processor is designed for a specific user task, such as creating, editing, formatting, saving, and printing letters or reports; therefore it is application software, so option D is correct. A device driver controls communication with hardware, firmware stores low-level hardware instructions, and an operating system manages the whole computer rather than preparing a particular document.