Numpy MCQs with answers Page - 6

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Q. Which function would you use to calculate the correlation coefficient between two arrays?

  • (A) np.cov()
  • (B) np.corrcoef()
  • (C) np.corr()
  • (D) np.covcorr()

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Q. What does np.argsort() return when applied to an array?

  • (A) A sorted version of the array
  • (B) Indices that would sort the array
  • (C) The indices of maximum values in the array
  • (D) A boolean array indicating sorted order

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Q. Which function returns the sum of array elements along a specific axis?

  • (A) np.sum()
  • (B) np.add()
  • (C) np.aggregate()
  • (D) np.prod()

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Q. What is the purpose of using np.copy() on an array?

  • (A) To create a reference to the same array
  • (B) To create a deep copy of the array
  • (C) To convert the array to a list
  • (D) To sort the array

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Q. Which function generates random floating-point numbers in NumPy?

  • (A) np.random.rand()
  • (B) np.random.randint()
  • (C) np.random.random_integers()
  • (D) np.random.choice()

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Q. Which of the following functions can generate a sequence of evenly spaced numbers over an interval?

  • (A) np.arange()
  • (B) np.linspace()
  • (C) np.logspace()
  • (D) All of the above

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Q. What does np.empty() do when creating a new array?

  • (A) Creates an array filled with zeros
  • (B) Creates an uninitialized array of the specified shape
  • (C) Creates an array filled with ones
  • (D) Creates an array with random numbers

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Q. Which attribute of a NumPy array provides the total number of elements in the array?

  • (A) array.size
  • (B) array.shape
  • (C) array.ndim
  • (D) array.length

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Q. Which attribute gives the byte size of each element in a NumPy array?

  • (A) itemsize
  • (B) nbytes
  • (C) size
  • (D) bytesize

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Q. For a 2D array, what does np.sum(arr, axis=0) do?

  • (A) Sums the elements across each row
  • (B) Sums the elements down each column
  • (C) Sums all elements in the array
  • (D) Returns the number of rows

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