1. The snapping option of Windows 10 allows us to move up to four windows on one screen.

2. To use snapping, you simply need to drag a window to any edge or corner of the screen.

In a hierarchical database model, a parent record type can be associated with one or more child record types, but a child record type can have only one parent. This hierarchical structure is represented as a tree-like schema, where each parent record can have multiple child records, but each child record has only one parent. This model is useful for representing data with hierarchical relationships, such as organizational structures or file systems.

1. M.S. The following charts can be created in Excel.

- Column - Chart

- line chart

- Pie chart

- Donut chart

- Bar chart

- Area Chart

- XY (Scatter) chart

- Bubble chart

- Stock Chart

- Surface Chart

- Radar chart

- Combo chart

1. Optical fibres use total internal reflection to transfer data. The primary condition for total internal reflection is that the signal must travel from an optically denser medium to an optically rarer medium. Secondly, the angle of incidence must be greater than the critical angle.

The clrscr in C is a built-in function that is used for clearing the screen of the console output during the execution of the C program. This function is defined in the conio. h header file. We need to include the “conio.