Computer MCQs for Competitive Exams

The correct answer is Ada because Ada Lovelace (Augusta Ada King, Countess of Lovelace) wrote the world's very first machine algorithm in the mid-19th century.

• Step 1 (Historical Context): While working alongside Charles Babbage on his mechanical, general-purpose computer concept called the Analytical Engine, Ada Lovelace recognized that the machine could do more than mere calculation.
• Step 2 (Achievement): She published a set of detailed notes in 1843 containing an algorithm designed specifically to be executed by the machine to compute Bernoulli numbers, earning her recognition as history's first computer programmer.
• Incorrect Options:
  • Niklaus is incorrect because Niklaus Wirth was a 20th-century computer scientist famous for developing the Pascal programming language in 1970.
  • Bill Gates is incorrect because he is a modern technology entrepreneur who co-founded Microsoft in 1975, long after the dawn of initial programming concepts.
  • Dennis is incorrect because Dennis Ritchie was a modern computer scientist who co-created the C programming language and the Unix operating system in the early 1970s.

The correct answer is Binary Digit because a bit represents the most basic, fundamental unit of digital data computing architecture, holding a binary value of either 0 or 1.

• Binary Digit: This is the correct choice. The term 'bit' is a portmanteau formed by combining the starting letters of 'Binary' with the trailing letters of 'Digit'. Managed inside computer memory using capacitors and transistors, it maps out the binary state of an electronic circuit (either on or off).
• Incorrect Options:
  • Byte: This is incorrect. A byte represents a separate data grouping consisting of exactly eight individual bits processed together.
  • Character: This is incorrect. A single standard alphanumeric character typically requires a full byte (8 bits) of memory allocation to be stored under ASCII or Unicode encoding systems.

The correct answer is Application software because this specific category of computer programs is compiled to help end-users execute targeted productivity, creative, or communication tasks.

• Application software: This is the correct choice. Examples include word processors, web browsers, media players, and spreadsheet tools. These programs interface directly with the user to process specific operational workflows.
• Incorrect Options:
  • System software / Operating system: These are incorrect. They function as the underlying core software layer designed to manage hardware resources, execute background tasks, and run the applications.
  • Utility programs: This is incorrect. These are specialized maintenance tools used to analyze, configure, optimize, or protect system performance (e.g., antivirus programs or disk defragmenters).

The correct answer is Biometrics because it specifically describes the technical process of using distinct biological characteristics to verify human identity.

• Step 1 (Definition): Biometrics combines biology and computational analysis to measure unique physical or behavioral traits, such as iris patterns, facial geometry, voiceprints, and fingerprints.
• Step 2 (Application): Because these traits are incredibly difficult to replicate or forge, they serve as the foundation for modern high-security access control systems on smartphones, data facilities, and border entryways.
• Incorrect Options:
  • Bio measurement is incorrect because it is a generic combination of words and does not represent an established technical field or industry classification.
  • Computer security is incorrect because it is an incredibly broad umbrella term that encompasses networks, firewalls, encryption, and policies, rather than specific anatomical measurement methods.
  • Smart weapon machinery is incorrect because it refers to automated, guided defense hardware rather than authentication systems designed for human identity verification.

The correct answer is Ctrl + Shift + D because this specific combination acts as the standard global keyboard shortcut to apply a double underline style in Microsoft Word.

• Ctrl + Shift + D: This is the correct choice. Pressing these keys simultaneously targets the selected characters and draws a dual decorative underline rule beneath them without forcing users to navigate through the Font settings panel.
• Incorrect Options:
  • Ctrl + Shift + U: This is incorrect. In some Linux environments or specific text editors, this triggers Unicode entry fields, while standard Microsoft formatting bypasses it.
  • Ctrl + Alt + D: This is incorrect. This key combination is often mapped to system tasks like displaying the desktop or launching utility tools.

The correct answer is Monitor because a Cathode Ray Tube (CRT) is a legacy vacuum tube technology specifically engineered to project visual images onto a screen display.

• Step 1 (Definition): CRT technology works by firing modulated electron beams from guns onto a phosphorescent surface at the front of the tube, lighting up pixels to create an image.
• Step 2 (Context): Before thin, modern flat-panel LCD and LED displays were invented, CRTs were the universal manufacturing standard for heavy desktop computer monitors and television sets.
• Incorrect Options:
  • Keyboard is incorrect because a keyboard is an electromechanical input device used to type alphanumeric characters into a computer.
  • Mouse is incorrect because a mouse is a handheld hardware input controller used to navigate a graphical user interface pointer.
  • Mother board is incorrect because the motherboard is the main internal printed circuit board that structurally links all internal components together.

The correct answer is Global Positioning System because GPS is a satellite-based global navigation architecture managed to provide precise position, velocity, and timing synchronization data worldwide.

• Global Positioning System: This is the correct choice. Your original key listed 'Global', which is a fragmented word rather than the complete standard full form. The system relies on a constellation of operational satellites circling the Earth to transmit signals processed by local receivers in devices like smartphones and vehicle navigators.
• Incorrect Options:
  • Global Post System / Global Proximity System / General Positioning System: These are incorrect, fabricated distractor names that are not associated with any institutional satellite navigation network.

The correct answer is Local Area Network because this is the globally recognized networking term for computers connected together inside a tightly confined spatial area.

• Step 1 (Definition): A Local Area Network (LAN) links computers and shared peripherals (like printers) over a small geographic footprint, typically utilizing Ethernet cables or Wi-Fi.
• Step 2 (Application): LANs are universally deployed within homes, academic schools, office buildings, and laboratories to enable lightning-fast local file transfers and shared internet links.
• Incorrect Options:
  • Limited Area Network is incorrect because it is an invented term that does not represent any technical networking configuration.
  • Logical Area Network is incorrect because it confuses 'local' with logical topology models (such as VLANs, which are Virtual Local Area Networks).
  • Large Area Network is incorrect because networks covering large spatial fields are classified as Wide Area Networks (WANs) or Metropolitan Area Networks (MANs).

The correct answer is A sentence because, within Microsoft Word's selection expansion mode, the F8 key increases the text selection area based on a specific structural hierarchy.

• A sentence: This is the correct choice. Pressing F8 once turns on selection mode; pressing it twice highlights the nearest individual word; pressing it a third time expands the focus to encompass the entire current sentence.
• Incorrect Options:
  • A paragraph: This is incorrect. Highlighting an entire paragraph requires pressing the F8 key four consecutive times.
  • A whole document: This is incorrect. Selecting the complete document using this method requires pressing the F8 key five consecutive times.

The correct answer is click on it because interacting directly with a folder directory icon using your mouse pointer is the basic command to prompt the system to show its contents.

• Step 1 (User Action): In the file management layout of Windows Explorer, a single click on a folder directory inside the navigation panel (or a double-click in the main view window) signals the OS to open and present the files hidden inside.
• Step 2 (System Response): The user interface responds instantly by updating the main viewing pane to accurately reveal all nested subfolders and items.
• Incorrect Options:
  • collapse it is incorrect because collapsing a folder tree minimizes the list view and hides subdirectories from sight.
  • name it is incorrect because renaming a folder modifies its label identifier text but does not trigger an opening action.
  • give it a is an incomplete, nonsensical option string that lacks any applicable technical function in desktop operating systems.

The correct answer is 12 because, within standard computer typography and Microsoft Word past examination frameworks, single spacing translates directly to a 12-point vertical line spacing separation.

• 12: This is the correct choice. In traditional document layout guidelines, single spacing (designated as 1.0 spacing length) positions lines closely together by allocating approximately 12 points of vertical height per row. Correspondingly, double spacing (2.0) sets them 24 points apart.
• Incorrect Options:
  • 10 / 14 / 16: These are incorrect point configurations that do not correspond to the default mathematical definitions used for single-line paragraph structures in competitive ICT testing modules.

The correct answer is voice and non-voice because the architectural shift to Fourth Generation (4G) networks completely unified mobile communication by handling both vocal calls and multimedia data packages over a single IP system.

• Step 1 (Technical Shift): Legacy networks split voice communication and internet browsing data across separate channels. 4G LTE transformed cellular systems by processing standard voice signals along with sophisticated packet data over an all-IP framework.
• Step 2 (Capability): This infrastructure supports high-speed 'voice' streams (VoLTE) seamlessly running alongside intensive 'non-voice' digital interactions like live video feeds, online streaming, and rapid web access.
• Incorrect Options:
  • video data and information is incorrect because video is fundamentally just a subcategory of information, making the phrase linguistically redundant.
  • music and video is incorrect because both elements fall cleanly under a single entertainment data subcategory, completely excluding vital cellular voice calls.
  • video and audio is incorrect because it describes general media formats rather than the full, overarching telecommunications division between vocal telephone calls and data packages.

The correct answer is Paragraph because word processing applications utilize a built-in feature called 'word wrap' that automatically pushes text down to the next row without manual intervention.

• Step 1 (Word Processing Logic): When you type text inside applications like Microsoft Word, the software tracks page margin boundaries. Once a user types past the right-side limit, the typing cursor naturally drops down to a new line automatically.
• Step 2 (The Enter Rule): Because line management is completely automated, an author only strikes the Enter key when they are done writing an entire thought block and want to structurally introduce a new, blank paragraph unit.
• Incorrect Options:
  • Line is incorrect because pressing Enter at the end of every raw line breaks word wrap automation, creating major layout errors if margins are modified later.
  • Sentence is incorrect because consecutive sentences within a coherent idea block are separated simply by adding a single space after punctuation marks.
  • Word is incorrect because independent words are divided cleanly using the spacebar key to maintain proper reading layouts.

The correct answer is Dynamic because Dynamic Random Access Memory (DRAM) relies on capacitors that naturally leak electrical charge and must be continuously refilled to retain data.

• Step 1 (Technical Concept): Inside a DRAM chip, each bit of data is stored in a tiny configuration of a single transistor and a single capacitor. Because capacitors naturally lose their stored electrons over time, the memory controller must read and rewrite every single cell thousands of times per second to prevent data corruption.
• Step 2 (Trade-off): While this refreshing cycle makes dynamic memory slightly slower than static memory, its simple design allows for much higher storage densities and significantly lower manufacturing costs, making it the standard choice for main system RAM.
• Incorrect Options:
  • Static RAM is incorrect because SRAM uses flip-flops to store data bits, holding its state continuously without needing refresh cycles as long as power is maintained.
  • EPROM is incorrect because Erasable Programmable Read-Only Memory is a non-volatile medium that permanently retains its contents until it is wiped using strong ultraviolet light.
  • ROM is incorrect because standard Read-Only Memory is hardwired during manufacturing to store permanent startup instructions and does not require active power or refreshing.

The correct answer is Number of transistors because the evolutionary generations of Integrated Circuits (ICs) are strictly measured by the density of components integrated onto a single silicon chip.

• Step 1 (Classification Standards): Microchip technology scales across explicit density tiers based on structural complexity. These include Small-Scale Integration (SSI), Medium-Scale Integration (MSI), Large-Scale Integration (LSI), and Very Large-Scale Integration (VLSI).
• Step 2 (Application): Each progressive tier indicates an exponential leap in the quantity of transistors packed into the microchip architecture, scaling from just a handful of gates up to billions of logic components on modern processors.
• Incorrect Options:
  • Manufacturing is incorrect because while processing techniques differ, the universal engineering metric for categorizing chip generations is component capacity rather than the basic fabrication style.
  • Type of computer is incorrect because identical structural IC classifications (like VLSI microprocessors) are utilized across all form factors, ranging from pocket smartphones to massive supercomputer frames.
  • None of these is incorrect because component density remains the definitive foundational benchmark used by electronic engineers to classify microchips.

The correct answer is Paths because vector graphics rely entirely on mathematical equations that define geometric formulas rather than static colored grids.

• Step 1 (Technical Definition): Vector files utilize coordinates, points, curves, and lines (collectively known as paths) to illustrate an image. When you resize a vector graphic, the system instantly recalculates the math, keeping curves perfectly smooth.
• Step 2 (Practical Benefit): Because they are path-driven rather than pixel-driven, vector assets can be scaled up infinitely to billboard dimensions without experiencing any blurriness or pixelation.
• Incorrect Options:
  • Pixels is incorrect because pixels are the tiny, square, colored dots used exclusively to build raster images, such as JPEG photographs.
  • Palette is incorrect because a palette describes a chosen indexed library of colors allocated for a specific image, not a structural asset building block.
  • None of is an incomplete choice string that is mathematically invalidated by the presence of the correct geometric paths definition.

The correct answer is peripheral device because peripherals are external hardware components that plug into system buses to expand processing capabilities.

• peripheral device: This is the correct choice. Peripherals connect to the motherboard through auxiliary expansion interfaces (like USB or PCIe ports). Common examples include secondary display monitors, scanning devices, layout printers, and input controllers.
• Incorrect Options:
  • digital device / system add-on / disk pack: These are incorrect. These terms either represent general categories of hardware or specific types of storage storage packages, rather than the broad classification for auxiliary hardware expansion components.

The correct answer is ROM because Read-Only Memory chips are manufactured or programmed with static code that remains fixed after production.

• ROM: This is the correct choice. While PROM represents a specialized, programmable variation, public service examination keys standardly map the general 'programmed chip' definition directly to ROM, as it contains pre-flashed, unalterable background runtime instructions.
• Incorrect Options:
  • RAM: This is incorrect. Random Access Memory is volatile, unprogrammed workspace memory that is wiped clean every time the computer power cycles.

The correct answer is Register because CPU registers are ultra-high-speed internal memory locations that store volatile data during processing.

• Register: This is the correct choice. Located inside the CPU architecture itself, registers provide immediate storage for data values, instruction addresses, or calculation steps currently being processed by the Arithmetic Logic Unit (ALU).
• Incorrect Options:
  • Memory: This is incorrect. While broad memory (like RAM) holds data, it sits outside the CPU core and operates at a slower clock rate than specialized internal registers.
  • Address / Number: These are incorrect. These represent attributes or values held within memory cells rather than active hardware components.

If you think there is any confusion in given MCQS You can comment.

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The correct answer is System Analyst because this role is responsible for analyzing user needs and drafting the structural blueprints and specifications before coding begins.

• System Analyst: This is the correct choice. In corporate software development workflows, the Systems Analyst translates user requirements into technical blueprints, workflows, and logical data architectures. The programmer then takes these designs and writes the actual functional code based on those specifications.
• Incorrect Options:
  • Programmer: This is incorrect. The programmer writes the source code according to the architectures and blueprints already laid out by the analyst.
  • End user: This is incorrect. The end user simply interacts with the final software product to fulfill daily tasks.

The correct answer is Abu Yusuf bin Ibrahim because this legendary 8th-century Islamic jurist composed this foundational treatise on public finance, taxation, and agricultural administration.

• Abu Yusuf bin Ibrahim: This is the correct choice. Written at the direct request of Abbasid Caliph Harun al-Rashid, Kitab al-Kharaj by Qadi Abu Yusuf serves as one of the earliest comprehensive books on public revenue in Islam. It meticulously outlines the collection and legal administration of land tax (Kharaj), agricultural tithes (Ushr), and state welfare distribution.
• Incorrect Options:
  • Al-Mawardi: This is incorrect. He authored Al-Ahkam al-Sultaniyya (The Laws of Islamic Governance) in a much later era.
  • Imam Abu Hanifa: This is incorrect. While Abu Yusuf was his most prominent student and helped codify the Hanafi school of jurisprudence, Abu Hanifa himself did not author a specific public finance book under this title.

The correct answer is Both magnetic and Flash because magnetic storage media and non-volatile flash solid-state architectures form the overwhelming majority of computing consumer assets globally.

• Both magnetic and Flash: This is the correct choice. Traditional spinning platters (magnetic hard disk drives) provide large-scale data storage and server backups, while silicon chip architectures (flash storage found in solid-state drives, USB sticks, and smartphones) deliver high-speed access. Both are extremely common.
• Incorrect Options:
  • optical: This is incorrect. Optical formats like CDs, DVDs, and Blu-ray discs are increasingly obsolete due to the rise of flash memory and cloud computing.

The correct answer is Tipu Sultan because the celebrated ruler of the Kingdom of Mysore died defending his capital city, Seringapatam, against British East India Company forces during this conflict.

• Tipu Sultan: This is the correct choice. Known as the 'Tiger of Mysore', Tipu Sultan was killed in action on May 4, 1799, during the Fourth Anglo-Mysore War. His defeat and death marked a major milestone in the consolidation of British colonial control over southern India.
• Incorrect Options:
  • Aurangzeb: This is incorrect. The Mughal Emperor passed away nearly a century earlier, in 1707.
  • Shivaji: This is incorrect. The legendary founder of the Maratha Empire died in 1680.
  • The Nizam: This is incorrect. The Nizam of Hyderabad actually allied his forces alongside the British against Mysore during this 1799 military campaign.

The correct answer is Legacy system because this technical computing descriptor designates an outdated computer architecture, software package, or hardware format that remains in operation.

• Legacy system: This is the correct choice. Even if a legacy setup is unsatisfactory or falls short of modern efficiency benchmarks, organizations frequently keep it running because it still performs critical functions, or because the financial and logistical costs of replacing it are too high.
• Incorrect Options:
  • Ancient system / Historical system / Age old system: These are incorrect. These are casual, non-technical adjectives rather than formal IT architecture classifications.