Explanation

• The CPU (Central Processing Unit) is the brain of the computer.
• It performs all calculations, executes instructions, and controls other components.

Additional information:

• First commercial CPU: Intel 4004 (1971)
• Invented by: Italian physicist Federico Faggin
• CPU Examples: Clock speeds – 3.0 GHz, 3.5 GHz, 4.0 GHz, 4.5 GHz, 5.0 GHz

Last verified on 15-02-2026

Explanation

• In MS Excel, all formulas and functions start with the equal sign (=).
• This tells Excel to perform a calculation instead of treating the input as plain text.

Last verified on 10-02-2026

Explanation

• 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.

Last verified on 15-02-2026

Explanation

With your document open, select the "References" tab on the ribbon, then select "Table of contents.

Last updated 15-feb-2026

Explanation

An Excel workbook is a collection of worksheets 

It can also contain charts, macros, and other data

A workbook is the Excel file itself, typically with an .xlsx extension.

Contents: It holds one or more worksheets (grid-based spreadsheets).

Last updated 15-feb-2026

Explanation

F5: Starts the slideshow from the beginning.

Shift+F5: Starts the slideshow from the current slide.

Alt+F5: Starts the presentation in Presenter View. 

Last updated 15-feb-2026

Explanation

In MS Word, the default alignment for a paragraph is Left (or Left-aligned)

This setting aligns text along the left margin, leaving the right edge ragged

Shortcut: Ctrl+L 

Last updated 15-feb-2026

Explanation

The shortcut key to insert a new slide in a PowerPoint presentation is Ctrl + M,

Ctrl + N shortcut key used to Create a new presentation document

Ctrl + S shortcut key used to save a presentation

**

Last updated 15-feb-2026

Explanation

The correct method that cannot be used to edit the contents of a cell is  Pressing the Alt key. 

We can be edited a cell through Press the F2 key or Click the formula bar or Double click the cell.

Last updated 15-feb-2026

Explanation

The standard file format for PowerPoint presentations is .pptx,

It was introduced with Microsoft Office 2007 as part of the Office Open XML file formats.

Last updated 15-feb-2026