Quiz

1.	What is a user -defined data type?
2.	How do you determine the size of a structure?
3.	Why would you use a structure?
4.	Why happens when you declare an instance of a structure?
5.	How do you access parts of a structure?
6.	What is a pointer?
7.	Why would you use a pointer in a program?
8.	What is a pointer to a pointer?
9.	Why would you use a pointer to a pointer in a program?
10.	What is shown on the screen if you display the content of a pointer variable?

Answers

1.	A user-defined data type is a group of primitive data types defined by the programmer.
2.	The size of a structure is the sum of the sizes of all the primitive data types within the structure.
3.	You use a structure to group together related data.
4.	When you declare an instance of a structure, memory is reserved for all the primitive data types defined within the structure.
5.	You access parts of a structure by referring to the name of the instance of the structure followed by the dot operator, which is then followed by a primitive data type that is defined within the structure.
6.	A pointer is a variable and can be used as an element of a structure and as an attribute of a class in some programming languages such as C++, but not Java. However, the contents of a pointer is a memory address of another location of memory, which is usually the memory address of another variable, element of a structure, or attribute of a class.
7.	You use a pointer in a program in order to reduce the number of times data is copied within memory.
8.	A pointer to a pointer is a variable whose value is an address of another pointer variable.
9.	You use a pointer to a pointer in a program in order to arrange data without having to move data in memory.
10.	The address is shown on the screen if you display the content of a pointer variable.