C++ Dynamic Allocation with vectors and containers

  allocation, c++, dynamic, pointers, vector

1.What is the use of dynamic allocating vectors on the heap and is it a good practice?

2.What is the difference between the following:-

vector<Object> *col = new vector<Object>
 
vector<Object*> col

3.Does vectors dynamically allocate items on the heap in the following example:-

vector<Object> x;

or

vector<int> x;

Source: Windows Questions C++

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