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Found 208 results for "Data Science & Scientific Python" in Quizzes

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❓ Quiz Question

Oct 25, 2026

Quiz: How do you parse a string column 'timestamp' into native datetime objects and extract the day of the week in Pandas?

pd.to_datetime() parses string timestamps into DatetimeIndex/Series, and the .dt accessor exposes vectorized calendar properties.

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❓ Quiz Question

Oct 25, 2026

Quiz: Which SciPy subpackage provides algorithms for numerical optimization, curve fitting, and root finding?

scipy.optimize provides functions like minimize() , curve_fit() , and root() for mathematical optimization.

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❓ Quiz Question

Oct 25, 2026

Quiz: Which function in `scipy.stats` computes the probability density function (PDF) for a normal distribution with mean=0 and std=1?

scipy.stats.norm.pdf(x, loc, scale) evaluates the Gaussian probability density function where loc is mean and scale is standard deviation.

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❓ Quiz Question

Oct 25, 2026

Quiz: How does `scipy.linalg.solve(A, b)` solve the linear system A * x = b compared to computing `np.linalg.inv(A) @ b`?

Never invert matrices directly: scipy.linalg.solve uses efficient LU/Cholesky decomposition , avoiding instability and O(n³) cost.

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❓ Quiz Question

Oct 25, 2026

Quiz: Which SciPy function computes numerical 1D definite integrals (quadrature) of a mathematical function f(x) from a to b?

scipy.integrate.quad is the workhorse function in SciPy for high-precision 1D adaptive numerical integration (quadrature).

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❓ Quiz Question

Oct 25, 2026

Quiz: Which standard pattern creates a 2-row by 2-column grid of subplot charts with a shared x-axis in Matplotlib?

plt.subplots(nrows, ncols, sharex=True) initializes a grid of Axes objects organized in a 2D NumPy array.

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❓ Quiz Question

Oct 25, 2026

Quiz: How do you export a Matplotlib plot to a high-resolution PNG image with zero cropped labels?

fig.savefig('output.png', dpi=300, bbox_inches='tight') writes a publication-quality raster image and tightens bounding boxes to avoid truncated labels.

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❓ Quiz Question

Oct 25, 2026

Quiz: Which NumPy universal function method computes the cumulative running sum of an array in-place or along an axis?

np.cumsum(arr) (or np.add.accumulate ) computes the cumulative sum of elements along a given axis.

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