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NumPy Interview Questions and Answers

Ques 11. Explain the differences between np.dot() and np.matmul() in NumPy.

np.dot() performs matrix multiplication for 2-D arrays, while np.matmul() is equivalent to the '@' operator and is more general.

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Ques 12. Create a diagonal matrix using NumPy.

import numpy as npnarr = np.diag([1, 2, 3])

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Ques 13. Explain the purpose of np.meshgrid() in NumPy.

np.meshgrid() is used to create coordinate matrices from coordinate vectors, commonly used for 3D plotting.

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Ques 14. How to find the dimension of a NumPy array?

You can use the attribute 'ndim'. For example, if 'arr' is your array, use 'arr.ndim'.

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Ques 15. What is the difference between 'np.zeros()' and 'np.ones()' in NumPy?

'np.zeros()' creates an array filled with zeros, while 'np.ones()' creates an array filled with ones.

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