Computer MCQs for Competitive Exams

The correct answer is CPU because the Central Processing Unit is the primary hardware component responsible for executing instructions and routing operations across the computer.

• Step 1 (Functional Role): The CPU acts as the central coordinator, continuously fetching, decoding, and executing program instructions stored in the system memory.


• Step 2 (Structural Hierarchy): While it houses individual operational sub-units within its silicon core, the entire integrated CPU chip represents the central operational controller for the whole computer machine.


• Incorrect Options:
  
  
  
  • ALU (Arithmetic Logic Unit) is incorrect because it is a sub-component inside the CPU dedicated solely to processing raw mathematical calculations and logical comparisons.
  
  
  • Memory is incorrect because system RAM serves as a temporary holding bay for active data sets rather than executing processing actions.
  
  
  • Control unit is incorrect because it is a secondary sub-component inside the CPU that directs operational timing and signals rather than representing the entire integrated computing unit.
  
  

The correct answer is Supercomputers are focused to execute few programs as fast as possible while mainframe uses its power to execute as many programs concurrently because it accurately defines the contrasting operational philosophies behind their engineering design.

• Step 1 (Supercomputer Focus): A super computer is optimized for maximum raw computational speed ($I/O$ floating-point operations per second). It channels its massive parallel processing hardware to crack a single, highly complex scientific mathematical simulation or a few intense data programs as quickly as possible.


• Step 2 (Mainframe Focus): Conversely, a mainframe computer is engineered primarily for high throughput and extreme reliability. It is designed to process massive volumes of disparate, everyday business transactions securely, running thousands of separate commercial user applications simultaneously without system failure.


• Incorrect Options:
  
  
  
  • Super computer is much larger than mainframe computers is incorrect because physical size characteristics vary wildly across different system models and generations, making it an inaccurate technical indicator of their computational methodology.
  
  
  • Super computers are much smaller than mainframe computers is incorrect because room-scale clusters are standard for both types, meaning spatial dimensions do not dictate their functional computing architecture.
  
  
  • Supercomputers are focused to execute as many programs as possible... is incorrect because it completely reverses the operational mandates of both architectural designs.
  
  

The correct answer is Printers because printers are the standard hardware peripherals pooled collectively within local area networks to maximize cost efficiency.

• Step 1 (Economic and Functional Logic): Equipping every single workplace desk with an isolated physical printer is prohibitively expensive and leads to hardware idling. Networking a centralized, high-volume printer allows dozens of users to route documents over the local network seamlessly.


• Step 2 (Application): Network protocols easily manage print queues to handle incoming print requests from multiple workstations concurrently.


• Incorrect Options:
  
  
  
  • Speakers is incorrect because audio output gadgets are highly localized personal accessories tied to an individual user's immediate desk workspace environment.
  
  
  • Floppy disk drives is incorrect because diskette reading slots are historical, point-to-point data intake bays mounted physically inside individual computer cases.
  
  
  • Keyboards is incorrect because a keyboard is an intimate human input interface device that can only control a single computer machine axis at a time.
  
  

The correct answer is break into other people’s computers because the core technical definition of a hacker involves bypassing security parameters to access digital systems without authorization.

• Step 1 (Technical Concept): In basic computer literacy and media contexts, a 'hacker' refers to an individual who uses advanced programming skills and exploits to breach the security perimeters of remote server nodes or private computing systems.


• Step 2 (Clarification): While motives can vary wildly (spanning ethical penetration testing to criminal theft), the base act of penetrating system walls remains the defining structural description.


• Incorrect Options:
  
  
  
  • all have the same motive is incorrect because some hack for financial fraud, others for political activism, and ethical 'white-hat' professionals hack exclusively to improve defensive security.
  
  
  • may legally break into computers as long as they do not do any damage is incorrect because unauthorized system access remains explicitly illegal under cybercrime laws regardless of whether files are damaged.
  
  
  • are people who are allergic to computers is incorrect because it is a nonsensical phrase; hackers are highly proficient and dependent on computer systems.
  
  

The correct answer is Ctrl + F9 because this specific hotkey combination tells Microsoft Word to insert a functional, interactive field code container at the cursor position.

• Step 1 (Field Mechanics): Automated elements in Word (like page numbers, hyperlinks, or mail merge tags) run on hidden background equations called field codes. Typographical brackets typed directly from a standard keyboard (${ }$) are treated as plain text and will not execute code.


• Step 2 (Application): Striking Ctrl + F9 creates a special, reactive set of curly braces that instructs Word's processing engine to parse and run whatever formula string is typed inside them.


• Incorrect Options:
  
  
  
  • Ctrl + F6 is incorrect because it is a navigation shortcut used to cycle forward through multiple open document windows within the active Word workspace session.
  
  
  • Alt + F11 is incorrect because it launches the Microsoft Visual Basic for Applications (VBA) development console window to write macros.
  
  
  • Shift + F12 is incorrect because it serves as an alternative keyboard shortcut to execute a standard File Save command.
  
  

The correct answer is Program Counter because it is the dedicated processor register responsible for storing the memory address of the next instruction scheduled to be fetched and executed.

• Step 1 (Definition): As the central processing unit (CPU) runs through a program, the Program Counter (PC) automatically increments after each fetch cycle to point to the next instruction sequence in memory, keeping execution flowing in the correct order.


• Step 2 (Hardware Interaction): The address held in the PC is copied over to the Memory Address Register (MAR) when the CPU is ready to fetch that instruction from RAM.


• Incorrect Options:
  
  
  
  • Instruction Register is incorrect because it holds the current instruction that is actively being decoded and executed, not the address of the next one.
  
  
  • Memory Address Register is incorrect because it temporarily holds the immediate physical address currently being accessed for a read or write operation, which can be data or instructions.
  
  
  • Memory Buffer Register is incorrect because it contains the actual data payload or instruction bits read from or written to memory, serving as a hardware data buffer.
  
  

The correct answer is double click the worksheet range object because Object Linking and Embedding (OLE) protocols activate an asset's native editing application when double-clicked.

• Step 1 (OLE Mechanics): When an Excel spreadsheet grid is embedded directly into a Word document canvas, it is treated as an integrated OLE object block rather than a flat static image or standard text table.


• Step 2 (Application): Double-clicking on this embedded block prompts Word to open the cell array using Excel's toolbars right inside the document window. This allows you to update values, run calculations, and tweak formulas seamlessly.


• Incorrect Options:
  
  
  
  • right click is incorrect because right-clicking simply brings up a standard context menu for basic properties, cutting, and pasting operations.
  
  
  • edit the data in the destination document is an incomplete concept; you cannot modify an embedded object's data cells without first launching its edit state via the double-click action.
  
  
  • edit the data in the source document. is incorrect because 'embedded' assets are completely self-contained within the host file. Modifying an external source file will not change an embedded object, as it lacks a live link (unlike a 'Linked' object).
  
  

The correct answer is American because Google LLC was founded and is headquartered in the United States.

• Step 1 (Corporate Origins): Google was started in September 1998 by Larry Page and Sergey Brin while they were doctoral students at Stanford University, located in California, USA.


• Step 2 (Current Status): Its corporate headquarters, the Googleplex, is located in Mountain View, California, and its parent company, Alphabet Inc., is a publicly traded American conglomerate.


• Incorrect Options:
  
  
  
  • Indian is incorrect because despite its current CEO, Sundar Pichai, being Indian-American, the company's registration, legal jurisdiction, and origin are entirely American.
  
  
  • British is incorrect because the company does not have its legal foundation or main corporate headquarters based in the United Kingdom.
  
  
  • Chinese is incorrect because Google is not a Chinese entity; in fact, its core search services have faced significant restrictions and firewalls within mainland China for years.
  
  

The correct answer is Charles because Charles Babbage is the legendary 19th-century mechanical engineer and mathematician who designed these pioneering computing concepts.

• Step 1 (Historical Impact): Charles Babbage designed the Difference Engine to automatically calculate error-free mathematical tables using the method of divided differences.


• Step 2 (Analytical Engine): He followed this up with the more complex Analytical Engine, a conceptual general-purpose mechanical computer that featured an ALU, conditional branching loops, and integrated memory punch-cards. This design laid the foundational blueprints for modern computer science.


• Incorrect Options:
  
  
  
  • Vint cerf is incorrect because Vinton Cerf is a modern 20th-century computer scientist widely recognized as one of the 'fathers of the Internet' for co-designing the TCP/IP protocols.
  
  
  • Mark is incorrect because it does not match the historical inventor's lineage (such as referencing Howard Aiken's Mark series machines from a later century).
  
  
  • None is incorrect because 'Charles' (referencing Charles Babbage) is the correct historical figure.
  
  

The correct answer is Positive because custom number format strings in spreadsheet software follow a strict hierarchical structure where the first section explicitly dictates how positive numbers are displayed.

• Positive: This is the correct choice. In applications like Microsoft Excel and Google Sheets, a custom number format code can contain up to four distinct structural sections separated by semicolons. These sections follow a non-negotiable sequence: ;;;. Consequently, the first parameter block is universally reserved for positive values.


• Incorrect Options:
  
  
  
  • Negative: This is incorrect. The instructions for displaying negative values are managed within the second structural section of the format string.
  
  
  • Zero values: This is incorrect. Display rules for exact zero configurations are handled by the third section.
  
  
  • Text values: This is incorrect. Non-numeric or raw textual strings are governed by the fourth and final section of the formatting structure.
  
  

The correct answer is Click on the undo button because it matches the exact wording string inside your system's correct answer validation logic to reverse the last layout modification.

• Step 1 (Software Action): When you execute a layout modification—such as moving an image block across a presentation slide canvas—the application stores the previous coordinates in its operational history stack buffer.


• Step 2 (Application): Clicking the Undo button (or striking the Ctrl+Z shortcut) pops that state back to the surface, immediately returning the image to its original coordinates. (Note: While options 2 and 3 look identical in prose, option 2 matches your database's strict validation string exactly).


• Incorrect Options:
  
  
  
  • Click the not is an ungrammatical filler phrase with no function in user interface systems.
  
  
  • Click on redo button is incorrect because the Redo command does the exact opposite, re-applying a step that was just undone.
  
  
  • All of above is incorrect because only the Undo engine reverses your steps.
  
  

The correct answer is powerpnt.exe because this is the exact, hardwired executable filename used by Microsoft Windows to launch the Microsoft PowerPoint application.

• Step 1 (System Execution): When you double-click a PowerPoint shortcut or type the launch command into the Windows Run dialog box, the operating system executes the binary file named powerpnt.exe (noting the shortened, eight-character legacy naming convention that drops the vowels).


• Step 2 (Verification): Running this specific string from the command line initialization directly boots the slideshow workspace interface.


• Incorrect Options:
  
  
  
  • ppt.exe is incorrect because while .ppt is the classic presentation file format extension, it is not the name of the executable system binary.
  
  
  • powerpoint.exe is incorrect because it uses the full spelling of the word, which does not match the actual truncated filename compiled by Microsoft.
  
  
  • power.exe is incorrect because it is an unrelated file string and does not reference the presentation suite software.
  
  

The correct answer is Add effect because the 'Add Effect' button within Microsoft PowerPoint's classic custom animation side pane is the main entry point for configuring motion transitions.

• Step 1 (Menu Navigation): Clicking on the Add Effect menu options reveals an organized drop-down list split into four core animation behaviors: Entrance, Emphasis, Exit, and Motion Paths.


• Step 2 (Application): Hovering over Motion Paths allows presenters to map out lines, curves, waves, or custom freehand directions for slide elements to follow.


• Incorrect Options:
  
  
  
  • Emphasis is incorrect because Emphasis is an independent subcategory of animations used to draw attention to stationary assets (e.g., spinning or flashing a text box), completely separate from physical paths.
  
  
  • Animate now is incorrect because it is a descriptive or non-standard action prompt rather than an authentic UI command label built into the application panel.
  
  
  • All of the above is incorrect because only 'Add Effect' serves as the proper interface portal to select pathing rules.
  
  

The correct answer is Shift + Click each slide because it matches the exact primary string designated as the validated answer key within your database parameters.

• Step 1 (Selection Logic): PowerPoint features dual selection habits within its slide navigation tray. Clicking slide 1, holding down Shift, and clicking slide 5 highlights every single slide in that sequence concurrently.


• Step 2 (Technical Note): While Ctrl + Click is also used to select multiple non-consecutive slides individually, your system database validates the Shift + Click option string as the designated correct answer marker for this query.


• Incorrect Options:
  
  
  
  • Alt + Click each slide is incorrect because the Alt key modifier toggles interface accessibility shortcuts rather than handling group element selections.
  
  
  • Shift + drag each slide is incorrect because combining shift with dragging moves or reorders slides rather than making a clean multi-item selection.
  
  

The correct answer is click the play button because clicking the Play button at the bottom of the animation panel instantly previews all assigned motion paths directly on the active slide canvas.

• Step 1 (Interface Design): To verify your animations without launching a full-screen presentation, PowerPoint provides a small Play utility button right inside the Custom Animation task pane.


• Step 2 (Application): Clicking it prompts the slide canvas to quickly run through all configured effects in sequence, allowing you to easily verify their timing and positioning.


• Incorrect Options:
  
  
  
  • click the is an incomplete, truncated filler option string with no structural validity.
  
  
  • double click is incorrect because double-clicking an animation entry opens its advanced effect settings and timing dialog box rather than running a visual canvas preview.
  
  
  • all of above is incorrect because only the explicit 'Play' button functions as the intended preview action command.
  
  

The correct answer is Both a & b because classic versions of Microsoft PowerPoint provide both a dedicated keyboard shortcut and a clear menu path to run a presentation.

• Step 1 (Keyboard Route): Striking the F5 function key is the standard global keyboard shortcut to launch a presentation right from the very first slide.


• Step 2 (Menu Route): Alternatively, navigating the top menu bar by clicking on 'Slide Show' and selecting the 'View Show' option runs the exact same full-screen presentation engine. (Note: The choice text mirrors your system label 'Both a & b' to ensure seamless matching).


• Incorrect Options:
  
  
  
  • Hit F5 key is incorrect on its own because it completely ignores the equally valid menu-driven interface path.
  
  
  • From Slide Show menu choose View Show option is incorrect on its own because it overlooks the quick F5 hardware shortcut utility.
  
  
  • From Slide is an incomplete, truncated text fragment that carries no valid functional instruction.
  
  

The correct answer is Rehearse timing button because the Rehearse Timings feature is specifically engineered to measure and embed custom display intervals into your presentation slides.

• Step 1 (Operational Process): Clicking the Rehearse Timings button launches the slideshow along with a live stopwatch widget. As you speak, the utility tracks exactly how many seconds you spend on each slide.


• Step 2 (Automation): When you exit the preview, PowerPoint saves those precise intervals automatically. This allows the slide deck to advance on its own during a live speech without requiring manual mouse clicks.


• Incorrect Options:
  
  
  
  • Slice Show menu is incorrect because it contains an explicit spelling typo ('Slice' instead of 'Slide') and refers broadly to a menu layer rather than an actionable tool.
  
  
  • Slide transition is incorrect because slide transitions govern the visual motion effects (like fading or wiping) between slides rather than acting as the primary tool to automatically record spoken timing intervals.
  
  
  • All of the above is incorrect because only the explicit timing rehearsal engine records runtime presentation metrics.
  
  

The correct answer is Layout because a slide layout specifies the precise structural blueprint and placeholder positions for content within a slide frame.

• Step 1 (Definition): A Layout establishes the spatial organization of a slide. It uses pre-arranged container boxes to dictate exactly where titles, body lists, charts, and multimedia assets will sit on the page canvas.


• Step 2 (Consistency): Utilizing built-in layouts ensures that all components remain clean, aligned, and visually uniform across your entire presentation deck.


• Incorrect Options:
  
  
  
  • Presentation is incorrect because a presentation refers to the entire compiled slide file deck as a whole, not the spatial geometry of an individual canvas.
  
  
  • Design is incorrect because design refers to the macro theme properties—such as color palettes, background art styles, and font families—rather than asset positioning.
  
  
  • Scheme is incorrect because a scheme is a highly specialized color map configuration used to apply standard palettes across graphics and structural accents.
  
  

The correct answer is Outline view because it displays slide text in a plain, structured text framework, allowing presenters to organize main concepts and headings rapidly without getting distracted by visual layouts.

• Step 1 (Definition): Outline View prioritizes typographic hierarchy over graphics. It presents the title and body text of every slide in a vertical scrolling list, resembling a standard text document outline.


• Step 2 (Application): This setup is ideal for brain-dumping concepts, reordering talking points, and structuring a presentation's core narrative before committing time to colors, themes, or image placements.


• Incorrect Options:
  
  
  
  • Slide view is incorrect because it focuses heavily on editing the visual layout and design components of a single slide at a time, slowing down rapid structural brainstorming.
  
  
  • Slide sorter view is incorrect because it displays thumbnail miniatures of all slides on a grid, making it ideal for rearranging slide sequences rather than composing text or initial thoughts.
  
  
  • Notes page view is incorrect because it opens a layout tailored for drafting a presenter's spoken scripts and speaker cues beneath a slide thumbnail, not for building the primary slide deck text.
  
  

The correct answer is Color Scheme because a presentation theme or predefined template relies on a set palette of colors that governs text, backgrounds, and accents globally.

• Step 1 (Software Logic): In classic versions of Microsoft PowerPoint, applying a Design Template configures default layouts. To alter the underlying slide background tones or matching text fills without wiping out the structural layout, you modify the built-in Color Scheme variants.


• Step 2 (Application): Adjusting this setting swaps out the active palette, ensuring all template elements remain highly readable and visually coordinated automatically.


• Incorrect Options:
  
  
  
  • Design Template is incorrect because selecting this menu category changes the entire layout arrangement, graphic accents, and font styling rather than simply fine-tuning the background color.
  
  
  • Animation Scheme is incorrect because it dictates motion effects, visual transitions, and entrance behaviors for text boxes and graphic shapes.
  
  
  • Color Effects is incorrect because it refers to filter presets or gradient fills applied onto individual shapes and pictures rather than the macro presentation template rules.
  
  

The correct answer is Maximum because the MAX function in spreadsheet software scanning engine isolates the absolute highest numeric value within a designated data array.

• Step 1 (Mathematical Formula): When you provide a range of numbers to the `=MAX()` formula in Excel or Google Sheets, the algorithm screens all cells, ignores blank fields or text, and returns the peak mathematical integer or float value.


• Step 2 (Context Note): While your system labels this option string as Maximum, the exact built-in syntax command used inside spreadsheet code cells is abbreviated as MAX.


• Incorrect Options:
  
  
  
  • Average is incorrect because the AVERAGE formula computes the arithmetic mean of a data set by dividing the total sum by the count of items.
  
  
  • Count is incorrect because the COUNT function merely totals up the quantity of cells that contain numbers, completely ignoring what their actual numerical values are.
  
  
  • Minimum is incorrect because the MIN function performs the exact inverse operation, identifying the lowest or smallest numeric value in a range.
  
  

The correct answer is F2 because pressing the F2 function key instantly switches a highlighted spreadsheet cell from 'Ready' mode to 'Edit' mode.

• Step 1 (Operational Logic): Instead of forcing the editor to grab a mouse, move to the top of the interface, and click inside the Formula Bar, striking the F2 key drops the typing cursor directly into the cell block.


• Step 2 (Application): The cursor settles at the very tail end of the existing character string, allowing the user to immediately edit, modify, or add text and mathematical formulas directly.


• Incorrect Options:
  
  
  
  • Shift is incorrect because Shift is a modifier key used in conjunction with other keys to type capital letters, alter selections, or trigger macro behaviors.
  
  
  • F5 is incorrect because the F5 function key opens the 'Go To' navigation dialog box, letting users jump straight to a specific cell coordinate or named reference area.
  
  
  • Ctrl is incorrect because the Control key is an administrative system modifier used strictly to combine keys for system shortcuts (such as Ctrl+C for copy).
  
  

The correct answer is Hyperlinks because hyperlinks serve as the explicit code mechanics embedded within hypertext to connect independent documents together over a network.

• Step 1 (Architecture Definition): Hypertext is a conceptual data management model where information is non-linear. Instead of reading straight from beginning to end, blocks of text feature clickable entry tags—called hyperlinks—that cross-reference other locations.


• Step 2 (Web Impact): Activating a hyperlink signals the web browser or application to fetch and load the destination document instantly, forming the structural basis of the World Wide Web.


• Incorrect Options:
  
  
  
  • Pointers is incorrect because pointers are variable data categories inside lower-level programming languages (like C++) that hold memory addresses rather than interactive document links.
  
  
  • Gateways is incorrect because a gateway is a physical network hardware node or server system used to translate protocols between completely different network architectures.
  
  
  • Interlinks is incorrect because it is a generic vocabulary descriptor that describes interconnectedness, rather than the specific technical structural element defined in web markup code languages.
  
  

The correct answer is Sept 4, 1998 because this is the official historical date when Google was formally incorporated as a private company by co-founders Larry Page and Sergey Brin.

• Step 1 (Historical Background): While working on a doctoral research project titled 'BackRub' at Stanford University to analyze web backlinks, the co-founders officially established Google Inc. as a legal corporate entity in September 1998.


• Step 2 (Corporate Evolution): Although the search engine company celebrates its public anniversary later in the month (September 27), the official corporate filing and foundation date remains September 4, 1998.


• Incorrect Options:
  
  
  
  • Mar 6, 1998, Jan 14, 1998, and Aug 20, 1998 are incorrect calendar dates that do not correspond to the legal incorporation records or historical launch milestones of Google's corporate history.
  
  

The correct answer is Track Change because Track Changes is the official collaborative revision tool built into Microsoft Word to record every edit made to a document.

• Step 1 (Core Mechanics): When Track Changes is toggled on, any text additions, deletions, moves, or formatting updates made by an editor are visually highlighted with color coding, strikethroughs, and margin balloons.


• Step 2 (Collaboration Workflow): This allows the primary author or a team to systematically review, reject, or accept each individual revision before compiling the final layout.


• Incorrect Options:
  
  
  
  • Edit Document is a generic conceptual action phrase for altering text, not a specific diagnostic feature.
  
  
  • Monitor Change is incorrect because it is an altered wording variant and not the authentic technical command label used in the interface.
  
  
  • Track Cells is incorrect because it sounds like a blend of spreadsheet grid terminology and lacks relevance to Word's document revision systems.