numpy_test

What does NumPy primarily provide for Python?

• GUI applications
• Web development tools
• High-level mathematical functions and arrays
• Image editing features

Which command creates a 1D array from 0 to 9 in NumPy?

• np.arange(10)
• np.linspace(0, 9, 10)
• np.range(10)
• np.list(10)

What is the result of np.zeros((2,3))?

• 2x3 array of ones
• 3x2 array of zeros
• 2x3 array of zeros
• 2x3 array with random values

What attribute returns the shape of a NumPy array?

• .shape()
• .dim()
• .size()
• .shape

Which function reshapes a 1D array into 2D?

• reshape()
• ravel()
• resize()
• transpose()

What does .T do on a NumPy array?

• Creates a new array
• Transposes it
• Resizes it
• Removes last axis

What type of operation is a + b for NumPy arrays?

• Loop-based
• Matrix multiplication
• Element-wise addition
• Broadcast function

Which function computes the square root of each element?

• np.sqrt()
• np.square()
• np.root()
• np.pow()

Which syntax selects the second column in a 2D array a?

• a[1,:]
• a[:,1]
• a[1]
• a[1,1]

How do you sum over columns in a 2D array?

• a.sum(axis=0)
• a.sum(axis=1)
• a.sum()
• sum(a)