Python
What type of data is: a=[(1,1),(2,4),(3,9)]?

List of tuples
Invalid type
Array of tuples
Tuples of lists

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Python
What is the use of duck typing?

No restriction on the type values that can be passed to a given method
Makes the program code smaller
Less restriction on the type values that can be passed to a given method
More restriction on the type values that can be passed to a given method

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