ISRO CSE 2014 | Question: 39

Question

If only one memory location is to be reserved for a class variable, no matter how many objects are instantiated, then the variable should be declared as

• A. extern
• B. static
• C. volatile
• D. const

Answer 1

the answer is b . Static memebers of a class share same memory by all the object. if u want to check just make a class and define a variable static in it . else if u don't want to type here u go . check this post . http://www.learncpp.com/cpp-tutorial/811-static-member-variables/

Answer 2

answer is static

Answer 3

Option B is the correct answer . 

The value of the static variable persists until the end of the program. Internal static variables are variables that are declared inside the function. These static variables can be used to retain the values of the function calls. 

Syntax is : Static datatype variable_name; 

So, if one memory location is to be reserved for a class variable, the variable should be declared as static so that any no. of objects instantiated can use it.