You may be talking about calling via WiFi, that is where you use WiFi to call people. That is normally used in tablets where you can't have a phone provider, so you just use WiFi to call and that saves a lot of money.
Answer: (B) An object and a pointer
Explanation:
In the computer science, the linked list is the collection of linear data where each data is basically denoted as node in the linked list. It is basically made up of the data object and a pointer that particular pints to the next node in the linked list data.
The linked list is basically collection of the node that each node are connected with the next node by using the pointer and also represent the sequence in the given linked list.
Segmentation divides a computer network into smaller parts. The purpose is to improve network performance and security.
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Answer:
1 - change views
2 - change fonts
3 - add controls
4 - insert rows and columns
5 - add existing fields
6 - change margins
7 - view the property sheet
8 - change padding