Variable and Comment in C++ MCQs Exercise I

Ques 1 Variable and Comment

Which of the following is the correct identifier in C++?

A var_123
B 123_var
C $__var
D #var

Ques 2 Variable and Comment

What is the output of following code? 


int main()
{
    string new = "SmallCode";
    cout<<"new is: "<<new;
    return 0;
}

A new is: SmallCode
B SmallCode
C Compilation Error
D new is:

Ques 3 Variable and Comment

Which of the following is the correct way to declare a variable?

A int arr[];
B int %num;
C var num;
D int x[7] ;