What is the importance of mutable keyword in C++? - CPP Quiz

CPP - Quiz(MCQ)

What is the importance of mutable keyword in C++?

A)

It will copy the values of the variable

B)

It allows the data member to change within a const member function

C)

It allows the data member to change outside a const member function

D)

It will not allow the data member to change within a const member function

Correct Answer : It allows the data member to change within a const member function

Explanation :

The mutable keyword allows the data member of a class to change within a const member function.

It allows to assign the values to a data member belonging to a class defined as “Const” or constant.

It allows a const pointer to change members.

It can be only applied to non-static and non-const data members of a class.

Recently Updated in CPP Questions

What is the signature of math in function using command line arguments?

A)

int main(int argc, char **argv);

B)

int main(int argc, char const **argv);

C)

int main(int argc, char const *argv[]);

D)

All of the above

Correct Answer : All of the above

Explanation : Any of the above signature can be used while using command line arguments in C++ programs

Which of the following gives the name of the program if the second parameter to the main fucntion is char **argv?

A)

argv[0]

B)

argv[1]

C)

argv[2]

D)

argv[3]

Correct Answer : argv[0]

Explanation : The first string in the list of command line arguments represents the name of the program which can be accessed by using argv[0].

What does the first parameter of the main function represent?

A)

List of command line arguments

B)

Stack of command line arguments

C)

Number of command line arguments

D)

Dictionary of command line arguments

Correct Answer : Number of command line arguments

Explanation : The first argument of the main() function represents the number of command line arguments that are passed.

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