When a reference is created, it can’t reference another object. This can be done with pointers. References cannot be null whereas pointers can be. References cannot be uninitialized and it is not possible to refer directly to a reference object after it is defined.
Example:
Syntax of reference:
<Type> & <Name>
int& rA = A; rA is a reference to int.
Static variable in a class is initialized when a. every object of the class is created b. last object of the class is created c. first object of the class is created d. No need to initialize static variable
Explain what are volatile variables?
What is static class data?
Static variable must be declared in public section of the class. a. True b. False
Static variable declared in a class are also called_________. a. instance variable b. named constant c. global variable d. class variable
Default value of static variable is_____. a. 0 b. 1 c. Garbage value d. Compiler dependent
We can initialize a value of static variable of a class only when its object is created. No other initialization is permitted. a. True b. False
If a class contains static variable, then every object of the class has its copy of static variable. a. True b. False
Which of the following are true about static member function? 1. They can access non-static data members 2. They can call only other static member functions 3. They can access global functions and data 4. They can have this pointer 5. They cannot be declared as const or volatile a. Only 2 b. Only 2,5 c. Only 2,3,4,5 d. Only 2 , 3 , 5 e. All of these
What is Class element in C++?
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