NCA-GENL Data Analysis and Visualization Practice Question
You are comparing the inference throughput of an LLM served with two different batching strategies across a range of request arrival rates. You want a single visualization that shows both the median throughput and the variability at each arrival rate. Which visualization is most appropriate?
⚠ Common exam trap
The trap here is treating variability as a secondary concern and selecting a mean-only line chart, which discards the spread the scenario explicitly asks to visualize.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
A box plot of throughput for each batching strategy, with arrival rate on the x-axis
A box plot is designed to show median and spread simultaneously, and placing one box per arrival rate per strategy makes the comparison direct. It handles skewed throughput distributions better than mean-only line charts and avoids the clutter of plotting every individual measurement.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
A line chart of mean throughput only, with one line per batching strategy
Why it's wrong here
A line chart of means shows the central trend but discards all information about variability, which is explicitly required. Throughput distributions in LLM serving are often skewed, so the mean alone can mislead when comparing batching strategies whose tail behavior differs.
- ✗
A stacked bar chart of total throughput summed across arrival rates
Why it's wrong here
Summing throughput across arrival rates destroys the per-rate comparison and hides variability entirely. A stacked bar chart also implies part-to-whole relationships that do not exist here, since throughput at one arrival rate is not a component of throughput at another.
- ✗
A scatter plot of individual throughput measurements colored by batching strategy
Why it's wrong here
A scatter plot shows every measurement but becomes cluttered when arrival rates are continuous, and it does not summarize the median or variability at each rate. The viewer would have to mentally aggregate points, making it hard to compare the two batching strategies cleanly at each arrival rate.
- ✓
A box plot of throughput for each batching strategy, with arrival rate on the x-axis
Why this is correct
A box plot at each arrival rate displays the median, interquartile range, and outliers, so it directly shows both central throughput and variability for each batching strategy. Grouping boxes by strategy makes the comparison across arrival rates straightforward and robust to non-normal throughput distributions.
About these practice questions
This NCA-GENL question is part of Courseiva's 367-question bank — original exam-style content with full explanations and wrong-answer analysis, never real exam questions or exam dumps. Learn why practice questions differ from exam dumps →
JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official NVIDIA exam blueprint
This NCA-GENL practice question is part of Courseiva's free NVIDIA certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the NCA-GENL exam.