Explanation

 Al Khawarizmi developed the concept of the algorithm in mathematics,

which is why some have called him the “grandfather of computer science”.

Explanation

@ Symbol is necessarily used in Gmail.

Explanation

When we open an Excel workbook, there are three sheets by default, and the default names on the tabs are:

 Sheet1

Sheet2

Sheet3

ND26-9-2023

Explanation

Switching between portrait and landscape modes done by Page setup dialog box

 Portrait and landscape are: Page Orientation 

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Portrait and Landscape are examples of page orientation in MS Word.

Page orientation is the direction in which a document is displayed or printed.

The two basic types of page orientation are portrait (vertical) and landscape (horizontal)

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Page orientation is the way in which a rectangular page is oriented for normal viewing. 

SH4-9-2023

Explanation

A comment is a note or annotation that an author or reviewer adds to a document.

Word displays the comment in a balloon in the margin of the document or in the Reviewing Pane.

Explanation

The MS excel worksheet are made up of rows and columns.

In worksheet, intersection of row and column is a rectangle, it is called as cell.

Cells are used to store the numbers, value, text or formula.

Document is not a term of MS excel

Explanation

Explanation

A unique constraint is a rule that forbids duplicate values in one or more columns within a table. Unique and primary keys are the supported unique constraints.

Explanation

WhatsApp allows users to send text, voice messages and video messages, make voice and video calls, and share images, documents, user locations, and other content. 

Initial release date: November 2009

Original authors: Brian Acton, Jan Koum

Yahoo was founded by Jerry Yang and David Filo in January 1994 and was incorporated on March 2, 1995.

Founded: January 1994

Headquarters: Sunnyvale, California, United States

Gmail is a free email service provided by Google.

Date launched: April 1, 2004

Created by: Paul Buchheit

Explanation

In MS Word, the header or footer is printed by default on each page.

You can update it in the Header and Footer menu.

The bottom margin of each page is known as a footer.