Answer the following statements true (T) or false (F)

Question

1. If, in a class, one uses the keyword public:, it affects only the member that immediately follows the keyword public, making this member accessible to any other function defined anywhere.
2. There is no access to private members of a class by any function defined outside the class.
3. A data type is a collection of a set of values together with a set of basic operations defined on the values.
4. An abstract data type is a collection of a set of values together with a set of basic operations defined on the values.

Answer 1

1. False
The effect of the public: keyword is from the keyword to the next private: keyword, so there is a region where anything that is there defined is public, not just a single member. The remark about access is correct.
2. True.
In a class, the all members defined after a keyword private: and before the next public: keyword are called private members. Access to private members by functions defined outside the class is prohibited. (Note: This ignores the issue of friend functions, which will be treated in a later chapter.)
3. True
Examples of a data type are int with +_*/% and other operations, double with +_*/.
4. false
To qualify as an abstract data type, a data type must conceal the details of how the operations and values are implemented. The operations should be sufficiently documented that one can use them without knowing the implementation.