Which of the following is not a difference between a class and a struct?

What is an lvalue?

What does auto type specifier do in this line of code (since C++11)? auto x = 4000.22;

A class template is a _?

What is the ternary operator equivalent to this code snippet? if(x) y=a; else y=b;

What is the meaning of the two parts specified between parentheses in a range-based for loop, separated by a colon?

What is the time complexity of delete the first variable in a deque object (e.g., deque<int> a;)?

What is a virtual function in C++?

What does the 'explicit' keyword do?

int *array = new int[10]; delete array;

Which C++ keyword allows the compiler to determine the type of a variable by the value used to initialized it?