1. A web browser is software used to view websites.

2. When a user requests a web page from a particular website, the browser retrieves its files from the web server and then displays that page on the user's screen.

3. Browsers are used on multiple devices, including desktops, laptops, tablets, and smartphones.

4. Some of the famous internet browsers in the world are – Google Chrome, Microsoft Edge, Microsoft Internet Explorer, Mozilla Firefox, Opera, Apple Safari, and Amazon Silk.

1. To cut a cell or range in Excel: Ctrl + X can be used to cut a selected cell or range in MS Excel. This copies the data to the clipboard and clears the original cells or range.

2. To cut text: Ctrl + X can be used to cut selected text in any text editor or word processor. This copies the text to the clipboard and frees up the original space.

3. To cut an image or object: Ctrl + X can be used to cut a selected image or object in any graphics program. This copies the image or object to the clipboard and frees up the original space.

1. In Microsoft PowerPoint, the Ctrl + D shortcut key inserts a duplicate of the selected slide.

2. Ctrl+D is a keyboard shortcut used in many computer programs to perform various tasks. In a web browser, pressing Ctrl+D adds the current webpage to your bookmarks or favourites list.

3. In Microsoft Excel and Google Sheets, pressing Ctrl+D fills a cell and overwrites it with the contents of the cell in a column above it.

1. F5 is used to start a presentation from the beginning.

2. We can see how your slideshow looks in full screen.

3. To start the slide show from the current slide, press Shift+F5.

4. The shortcut key to create a new slide in MS PowerPoint 2010 is Ctrl + M.

You can restore the following if your computer crashes.

1. Restoring the Windows Registry

2. Restoring installed applications

1. A presentation design template is used to ensure a uniform display of all the slides present in the presentation.

2. A presentation design template is a ready-made theme that includes text, images, shapes, and colours. Using templates, you can create a uniform look and feel for all slides.