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1.

What do you mean by traversal in data structure?

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The process of accessing each data item only once in group of elements for some operation.
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2.

How is memory allocated to a list in Python?

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A list in Python is an array that contains elements (pointers to objects) of a specific size only and this is a common feature of all dynamically typed languages. For the implementation of a list, a contiguous array of references to other objects is used. Python keeps a pointer to this array and the array’s length is stored in a list head structure. This makes indexing of a list independent of the size of the list or the value of the index. When items are appended or inserted, the array of references is resized.
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3.

What is sequential allocation of memory? Why do we say that lists are stored sequentially?

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A list is a allocated memory in a sequential manner. This means that the elements of the list are stored in memory in the sequence of their declaration. So, if you want to view the fifth element of the list, you have to first traverse through the first four elements of the list. This is called sequential allocation of memory.
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