This is a new data type introduced in C99, standard of C++.

This is the correct answer as it returns integer which represents the number of characters successfully written on string (first argument). Also the three dots at the end represents that it can have variable number of arguments which is required.

This was not included when C++ was standardized in 1999.

C++ structures and classes are same. The only difference is that C++ structures have public access by default while Class members have private access by default.

 The string function strcat( ) concatenates strings and not a character.

 Abstract classes act as expressions of general concepts from which more specific classes can be derived. You cannot create an object of an abstract class type. However, you can use pointers and references for abstract class types.

An unsigned short int is a 16 bit positive number and its range is from 0 to 65535.

The function getdisk( ) returns the drive number of current drive. The drive number 0 indicates 'A' as the current drive, 1 as 'B' and so on.

This macro expands to a system-dependent integral expression that, when used as the argument for function exit should signify that the application was successful. It is defined in header cstdlib.

 This pointer is added to every non-static member of class.

C is called a middle level language because it combines the best elements of high level language with the control and flexibility of assembly level languages.

The char, int, float, double and void are five data types defined by C. In C++ , add two more- bool and wchar_t. Hence, bool is the correct option.

Here default assignment operator is called as we have not overloaded assignment operator. So, this is the correct option as copy constructor will not be called here.

The pow is used to calculate the result of base raised to power exponent and is defined in math.h.

 Microsoft word is an application software developed by Microsoft. So, it does not fall under the category of systems program.

FOPEN_MAX means the number of files that can be opened by a program at any point of time and is defined in stdio.h. Hence, it is the correct answer.

In a 32-bit machine, integer will occupy 4 bytes. Therefore, answer should be 10*5*4 = 200 bytes. Hence, it is the correct answer.

Volatile is not a storage class specifier. However, it is a qualifier which tells the compiler that  variables may be changed in ways not explicitly specified by the program.

Tolower is defined in ctype.h. Hence, it is the correct answer.

C++ was developed by Bjarne Stroustrup in 1979. Hence, this is the correct answer.

All modern languages, like, C++, Java, Dot Net etc. are object oriented languages and C is a structural language.