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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: What is the role of `np.nan` in numerical NumPy arrays and how should equality with it be checked?

By IEEE 754 standards, NaN never equals NaN . You must always use np.isnan() or pd.isna() for comparison.

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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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Oct 25, 2026

Quiz: What is the core architectural principle of a microservice in distributed systems?

… high cohesion , bounded contexts, and independent database ownership per service.

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❓ Quiz Question

Oct 25, 2026

Quiz: What problem does the Transactional Outbox Pattern solve in distributed microservices?

The Outbox Pattern writes the event to a database table within the same ACID transaction as the entity, which a message relay then publishes to the broker.

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❓ Quiz Question

Oct 25, 2026