File Extensions — Set 4

Correct Answer: D. .onepkg

• **.onepkg** = a compressed archive format that bundles an entire OneNote notebook — all sections, pages, embedded images, and file attachments — into a single portable file for sharing or backup. • **Key fact** — unlike the regular .one format which saves only a single section, .onepkg captures the full notebook hierarchy so the recipient gets every page intact after unpacking. • Introduced with OneNote 2007, the package uses ZIP-based compression; double-clicking it on the recipient's machine automatically unpacks and opens the notebook inside OneNote. • 💡 Option A (.one) is wrong because it stores only one notebook section, not the whole packaged notebook; Option B (.onetmp) is wrong because it is a temporary auto-recovery draft file, not a shareable archive; Option C (.onetoc2) is wrong because it is a table-of-contents index that links sections together inside a notebook folder, not a self-contained package.

Correct Answer: C. .vssx

• **.vssx** = the Open XML-based Visio Stencil format introduced in Visio 2013 — it stores a reusable library of shapes (connectors, flowchart symbols, network icons) that users drag onto diagram canvases. • **Key fact** — a stencil file contains no actual diagram drawing; it functions purely as a shape palette, so many diagrams can reference the same .vssx file without duplicating shape data. • The 'x' suffix follows Microsoft's Open XML convention (like .docx, .xlsx), meaning the file is a renamed ZIP archive containing XML shape definitions and metadata. • 💡 Option A (.vsdx) is wrong because it is the standard Visio drawing file that holds the actual diagram content; Option B (.vstx) is wrong because it is a Visio template that provides a pre-set layout as a starting point for new diagrams; Option D (.vsd) is wrong because it is the legacy binary drawing format from Visio 2003 and earlier.

Correct Answer: A. .mpp

• **.mpp** = Microsoft Project's proprietary binary format that stores the complete project plan — task names, durations, dependencies, milestones, resource assignments, and Gantt chart data — in a single file. • **Key fact** — .mpp is the default save format for every version of MS Project since its release; project managers worldwide treat it as the industry-standard file for scheduling and resource planning. • The format is not openly documented, so third-party tools require special libraries to read .mpp files without converting them first to XML or CSV. • 💡 Option B (.mpt) is wrong because it is a Microsoft Project template used to start new projects with preset configurations, not an active project file; Option C (.prj) is wrong because it is a generic project or settings file used by various non-Microsoft applications; Option D (.msp) is wrong because it is a Microsoft patch file used by Windows Installer, completely unrelated to project scheduling.

Correct Answer: D. .pps

• **.pps** = the legacy PowerPoint Show format from Office 97-2003 — a binary file that opens directly in full-screen Slide Show mode, bypassing the editing environment entirely. • **Key fact** — a .pps file contains the exact same binary structure as a .ppt editing file, but its file association triggers presentation mode on double-click, making it ideal for distributing ready-to-run slideshows without exposing slide content to editing. • Although superseded by the Open XML .ppsx format in Office 2007, modern PowerPoint versions can still open .pps files for backward compatibility. • 💡 Option A (.ppsx) is wrong because it is the newer Open XML slide-show format introduced in Office 2007, not the binary 97-2003 era format; Option B (.pptx) is wrong because it is the editable Open XML presentation format that opens in normal editing view; Option C (.ppt) is wrong because it is the legacy binary presentation format that opens in editing mode, not show mode.

Correct Answer: C. Binary Document

• **.docb** = Microsoft Word Binary Document — a binary-encoded alternative to the XML-based .docx format, storing all text, formatting, and embedded objects in a compact binary structure rather than human-readable XML tags. • **Key fact** — .docb was designed for faster read and write performance on very large documents because binary parsing requires significantly less processing overhead than XML parsing. • Despite the speed advantage, .docb never gained widespread adoption; the vast majority of Word users save in .docx, and .docb files are not easily opened by non-Microsoft software. • 💡 Option A (Compressed XML) is wrong because .docb is a binary format, not an XML-based compressed file; Option B (Backup Document) is wrong because Word backup files use the .wbk extension, not .docb; Option D (Macro Template) is wrong because macro-enabled templates use the .dotm extension.

Correct Answer: A. .xlw

• **.xlw** = the Excel Workspace file format from the Excel 97-2003 era — it saves the multi-workbook session state by recording which workbook files were open, their window sizes, and their on-screen positions. • **Key fact** — .xlw stores no spreadsheet data whatsoever; it only saves file references and window arrangement, so opening a .xlw file restores the exact layout of multiple workbooks simultaneously without holding any cell values. • The workspace concept was removed from Excel 2013 onward, making .xlw files largely obsolete; modern users manage multiple workbooks through Windows taskbar grouping instead. • 💡 Option B (.xls) is wrong because it is the legacy binary workbook format that stores actual spreadsheet data, not session layout; Option C (.xlsx) is wrong because it is the modern Open XML workbook format for spreadsheet content; Option D (.xlt) is wrong because it is the legacy Excel template format for creating new workbooks with preset formatting.

Correct Answer: D. .dot

• **.dot** = the Microsoft Word Template format from Office 97-2003 — a binary file that stores pre-defined paragraph styles, page layout settings, custom toolbars, and boilerplate text so new documents can be created from a consistent master structure. • **Key fact** — .dot shares the same underlying binary format as .doc, but its file association causes Word to open a new blank document based on the template rather than opening the template file itself, protecting the master layout from accidental edits. • Word's default template was named Normal.dot; a corrupted Normal.dot was one of the most common causes of erratic formatting behavior in Word 97-2003 installations. • 💡 Option A (.dotx) is wrong because it is the modern macro-free XML template introduced in Office 2007, not the 97-2003 binary format; Option B (.doc) is wrong because it is the legacy editable document format, not a template; Option C (.dotm) is wrong because it is the macro-enabled XML template from Office 2007 onward.

Correct Answer: D. .accda

• **.accda** = Microsoft Access Add-in file — a compiled Access database that installs additional wizards, custom functions, or automation modules into the Access development environment for all databases opened on that machine. • **Key fact** — unlike a regular .accdb database, .accda files run silently in the background as extensions; they are registered in Access's add-in list and loaded automatically on startup, providing extra ribbon commands or VBA functions without any user action. • Developers distribute .accda add-ins to standardize workflows across teams, such as adding a custom data-import wizard or automated reporting module to every Access installation. • 💡 Option A (.accde) is wrong because it is a compiled read-only version of an Access database where VBA source code is hidden but still executes, not an add-in installer; Option B (.accdb) is wrong because it is the standard Access database format for storing tables, queries, and forms; Option C (.accdr) is wrong because it opens an Access database in restricted Runtime mode, preventing design changes, not functioning as an add-in.

Correct Answer: B. .vstx

• **.vstx** = the Microsoft Visio Template format in Open XML — it stores pre-configured diagram page settings, master shape libraries, theme styles, and layout guides so users can begin a new diagram with a professional structure already applied. • **Key fact** — opening a .vstx file creates a new unsaved drawing based on the template rather than opening the template itself, so the master layout is never accidentally overwritten by the user's work. • Microsoft ships built-in .vstx templates for network diagrams, floor plans, org charts, and flowcharts; organizations also create custom .vstx files to enforce brand-consistent diagramming standards. • 💡 Option A (.vsdx) is wrong because it is the standard Visio drawing file holding a completed or in-progress diagram, not a reusable master layout; Option C (.vssx) is wrong because it is a Visio Stencil containing a shape library to drag from, not a full layout template; Option D (.vsd) is wrong because it is the legacy binary Visio drawing format from older Visio versions.

Correct Answer: A. .ppam

• **.ppam** = PowerPoint Add-in file — a macro-enabled package that installs custom ribbon buttons, dialog boxes, and VBA-powered automation tools into PowerPoint so they are available across every presentation file opened on that machine. • **Key fact** — .ppam add-ins persist between sessions because they are registered in PowerPoint's add-in manager and loaded automatically every time PowerPoint starts, unlike presentation files which must be reopened manually each session. • Common .ppam add-ins include corporate branding enforcer tools, batch slide exporters, and accessibility checkers that apply uniformly across all presentations without any manual loading step. • 💡 Option B (.pptm) is wrong because it is a single macro-enabled presentation file, not a global add-in that installs into PowerPoint itself; Option C (.potm) is wrong because it is a macro-enabled template for creating new presentations with preset designs, not a persistent add-in; Option D (.pptx) is wrong because it is the standard presentation format that cannot contain or run macros at all.