Computer Operator & IT — Past Papers — Part 3 MCQs with Explanations

In MS Excel , every formula and function starts with the equal sign (=). The = tells Excel that the cell contains a formula , not plain text. Functions such as SUM, AVERAGE, and IF also begin with = . Without the = , Excel treats the entry as ordinary text.

Ctrl + F10 → Maximize/Restore selected document window Additional information : Alt + F4 → Close the active window Alt + Tab → Switch between open windows Windows + Up Arrow → Maximize the current window Windows + Down Arrow → Restore or minimize the current window

To edit or rename a file or folder , simply hit F2 when your file is selected. Additional information : Key Function Keys (F1–F12) F1 – Opens Help F2 – Rename selected file/folder (Windows) / Edit active cell (Excel) F3 – Opens Search F4 – Alt + F4 closes the active window F5 – Refreshes browser / Starts Slide Show in PowerPoint F6 – Moves to the next pane in Microsoft Word F7 – Spelling & Grammar Check F8 – Enables Extend Mode in Excel F9 – Updates/Refreshes fields in Microsoft Word F10 – Activates the Menu Bar F11 – Full-screen mode in browsers F12 – Save As in Microsoft Word

The shortcut key to change case in MS-Word is: Shift + F3. There are five change cases in MS Word: Sentence Case Lowercase Uppercase Title Case Toggle Case

Ctrl + Y is used for redoing the last undone action in most applications. Additional information: - Ctrl + Z: Undo - Ctrl + X: Cut - Ctrl + C: Copy - Ctrl + V: Past e

.pptx → Default PowerPoint Presentation (2007 and later) ppt → PowerPoint Presentation ( 97–2003 ) Additional information: .ppsx → PowerPoint Show (opens directly as a slideshow) .potx → PowerPoint Template .pptm → Macro-enabled Presentation

The shortcut key to print a document is Ctrl + P. Additional Information : Hyphen (-) is used to select a range for printing a document. By default, the documents are printed in portrait-oriented mode. Ctrl + A = select all Ctrl + B = Bold Ctrl + I = Italic Ctrl + P = Print Ctrl + Y = Redo Ctrl + S = Save

Ctrl + T creates a Hanging Indent . It moves the first line differently from the remaining lines of a paragraph. It is commonly used for bibliographies and reference lists . Additional information : Ctrl + M : Increase Left Indent Ctrl + Shift + M : Decrease Left Indent

Excel 2007–2026 (Default): .xlsx Additional information : Excel 97 – 2003 (Default): .xls Excel Macro-Enabled Workbook: .xlsm Excel Binary Workbook: .xlsb Excel Template: .xltx

F5 is used to start a Slide Show from the beginning in Microsoft PowerPoint. It displays the presentation in full-screen Slide Show view . Additional information : Shift + F5 starts the slide show from the current slide . F4 repeats the last action in many Microsoft Office applications. F6 moves between different areas of the PowerPoint window.

The keyboard shortcut to open an existing file in Microsoft Word is Ctrl+O. You can also open a document in Word by double-clicking its icon in Windows. Additional information: Ctrl+N : Opens a new or blank document Ctrl+S : Saves the document Ctrl+W : Closes the document Ctrl+A : Selects all contents of the page Ctrl+B : Bolds highlighted selection Ctrl+C : Copies selected text Ctrl+X : Cuts selected text Ctrl+P : Opens the print window

Ctrl + C is the shortcut key used to copy selected text or files . Additional information : Ctrl + B → Bold Ctrl + A → Select All Ctrl + W → Close current tab/window Alt + Tab → Switch between apps Alt + F4 → Close the active app Win + D → Show/Hide Desktop Win + ← / → → Snap windows left/right Win + Tab → Open Task View Verified & Updated

ARPANET was the first network that initiated the Internet . It was launched in 1969 by the U.S. Department of Defense's ARPA . ARPANET stands for Advanced Research Projects Agency Network . Additional information : First message sent: 29 October 1969 TCP/IP adopted: 1 January 1983 World Wide Web introduced: 1989 (by Tim Berners-Lee) Public Internet growth: 1990s

A single page of a PowerPoint presentation is called a Slide . A slide is a single screen/page that contains text, images, charts, videos, or other presentation elements . A collection of slides forms a PowerPoint presentation . PowerPoint is a presentation software developed by Microsoft . Slides can be displayed using Slide Show mode . The default PowerPoint file extension is .pptx .

ایک لالچی الگورتھم (Greedy Algorithm) ہر مرحلے پر دستیاب بہترین مقامی انتخاب کرتا ہے، تاکہ ایک مکمل حل تیار کیا جا سکے۔

DOCX is the newer version of DOC, the original official Microsoft Word file format. Microsoft Word 97 - 2003 Document extension (.doc). Microsoft Word 2007 to till date Document extension (.docx). Additional information : .xls extension of Excel . .ppt extension of PowerPoint . .txt extension of Text files . .pdf extension of Portable Document Format.

Full Form: Portable Document Format (PDF) Developed by: Adobe Inc. Introduced: 1993 Co-founder associated with Adobe: Charles Geschke Purpose: Reliable document sharing and viewing ان سولات کو ضرور پڑھیں Click here

Pressing F2 allows you to edit the contents or formula of the current cell in MS Excel. Additional information : F4 : Repeat last action / toggle absolute and relative references CTRL + 1 : Opens Format Cells dialog CTRL + F : Opens Find dialog Works in: Excel 2007, 2010, 2013, 2016, 2019, 365

The Taskbar provides access to the Start menu . It contains shortcuts to programs and running applications . It also provides access to system controls such as volume . Additional information : Menu Bar : Contains commands and menus. Title Bar : Displays the title of the active window.

Powerpnt.exe is the executable file responsible for starting Microsoft PowerPoint . The .exe extension indicates an executable program file in Windows. Powerpnt.exe is associated with launching Microsoft PowerPoint . Additional information : Winword.exe → Microsoft Word Excel.exe → Microsoft Excel

" Superscript " is not a font style in MS Word. Superscript is a text effect used to raise characters above the normal line of text. Font styles include options like Bold, Italic, and Regular.

In MS Word, Ctrl + J is used to justify text. Justified text is evenly aligned on both left and right margins . It is commonly used in books, newspapers, and formal documents . Additional information : Ctrl + L → Left align Ctrl + E → Center align Ctrl + R → Right align Last verified 29-05-2026

Slide Master View Used to edit global layouts, fonts, and backgrounds across all slides Changes apply uniformly to the entire presentation Additional information: Normal View – edits individual slides one at a time; no global changes . Reading View – for viewing/reviewing only; not editable. Slide Sorter View – rearranges slide order; no editing of content or layouts. Last updated 07-09-2026 by NA

Windows + D shows or hides the desktop. It minimizes all open windows to display the desktop. Pressing Windows + D again restores the previously open windows. Additional information : Windows + E : Opens File Explorer. Windows + M : Minimizes all windows.

Shareware is commercial and copyrighted software. It is often provided for a limited trial period . Some shareware versions have restricted features until purchase. Users can try the software before buying the full version.

HTTP stands for Hypertext Transfer Protocol. It uses port 80 by default for non-secure web communication. For secure HTTP (HTTPS), the default port is 443. Last updated by NA on 15-02-2026

Ctrl + K → Insert Hyperlink Additional information : Ctrl + P → Print Ctrl + F2 → Print Preview Ctrl + H → Replace dialog box Ctrl + D → Font dialog box

RAM (Random Access Memory) is used for both read and write operations . RAM is a volatile memory, meaning data is lost when the power is t urned off . It temporarily stores data and instructions needed by the CPU during processing. Additional information : ROM is mainly used for read-only operations and stores permanent instructions. PROM can be programmed once .

The shortcut key for Undo (last action reverse) is Ctrl + Z in most computer systems. It is used to cancel the last mistake or action. Additional information : Ctrl + P = Print Ctrl + Y = Redo Ctrl + S = Save Ctrl + C = Copy command Ctrl + V = Paste Ctrl + C = Copy Ctrl + X = Cut Ctrl + Y = Redo

DNS translates human-readable domain names, such as example.com, into IP addresses used by networked systems.

Parameterized queries separate SQL code from user-supplied data, greatly reducing the risk of SQL injection.

Containerization packages an application with its dependencies so it can run consistently in an isolated environment.

A stack follows LIFO, meaning the most recently inserted element is removed first.

A primary key uniquely identifies each row in a relational database table.

The CPU executes instructions and performs arithmetic, logical, control, and related processing operations.

HTTP 404 means that the server could not find the requested resource.

An API (Application Programming Interface) defines how software components can communicate and exchange data or services.

HTTPS uses TLS encryption to protect data exchanged between a web browser and a web server.

A flash memory card is an electronic memory storage device. It uses flash memory to store digital data . It can store text, pictures, audio, and video . Additional information : Flash memory → Electronic/non-volatile storage Magnetic storage → Hard disks and magnetic tapes Optical storage → CDs, DVDs, and Blu-ray discs

The World Wide Web (WWW) was first introduced to the public on August 6, 1991 . It was created by Tim Berners-Lee. The first website was hosted at CERN in Switzerland .