String class have a concat() function that is used to _____________________

Related MCQs

• Which of the following is not correct (in C++)? 1. Class templates and function templates are instantiated in the same way 2. Class templates differ from function templates in the way they are initiated 3. Class template is initiated by defining an object using the template argument 4. Class templates are generally used for storage classes
• Which of the following is true about pure virtual functions? 1) Their implementation is not provided in a class where they are declared. 2) If a class has a pure virtual function, then the class becomes abstract class and an instance of this class cannot be created.
• Which of the following is incorrect in C++? (1)When we write overloaded function we must code the function for each usage. (2)When we write function template we code the function only once. (3)It is difficult to debug macros (4)Templates are more efficient than macros
• It is possible to define a class within a class termed as nested class. There are _____ types of nested classes.
• In C++, const qualifier can be applied to 1) Member functions of a class 2) Function arguments 3) To a class data member which is declared as static 4) Reference variables
• Which of the following is true about templates? 1) Template is a feature of C++ that allows us to write one code for different data types. 2) We can write one function that can be used for all data types including user defined types. Like sort(), max(), min(), ..etc. 3) We can write one class or struct that can be used for all data types including user defined types. Like Linked List, Stack, Queue,..etc. 4) Template is an example of compile time polymorphism.
• Which of the following, in C++, is inherited in a derived class from base class?
• Which one of the following is correct, when a class grants friend status to another class?
• When the inheritance is private, the private methods in base class are __________ in the derived class (in C++).
• If a function is friend of a class, which one of the following is wrong?