Case Study 2 - MJTelco Company Overview MJTelco is a startup that plans to build networks in rapidly growing, underserved markets around the world. The company has patents for innovative optical commu
The correct answer is B. Look through the current data and compose a small set of generalized charts and tables bound to criteria filters that allow value selection.. Option B is correct because generalized charts with dynamic filter controls (date range, geography, installation type) automatically adapt to new data without requiring you to rebuild or update the visualizations - the filters let viewers slice the data themselves, satisfying all
Submitted by ngozi_ng· Mar 30, 2026Ensuring solution quality
Question
Case Study 2 - MJTelco Company Overview MJTelco is a startup that plans to build networks in rapidly growing, underserved markets around the world. The company has patents for innovative optical communications hardware. Based on these patents, they can create many reliable, high-speed backbone links with inexpensive hardware. Company Background Founded by experienced telecom executives, MJTelco uses technologies originally developed to overcome communications challenges in space. Fundamental to their operation, they need to create a distributed data infrastructure that drives real-time analysis and incorporates machine learning to continuously optimize their topologies. Because their hardware is inexpensive, they plan to overdeploy the network allowing them to account for the impact of dynamic regional politics on location availability and cost. Their management and operations teams are situated all around the globe creating many-to-many relationship between data consumers and provides in their system. After careful consideration, they decided public cloud is the perfect environment to support their needs. Solution Concept MJTelco is running a successful proof-of-concept (PoC) project in its labs. They have two primary needs: Scale and harden their PoC to support significantly more data flows generated when they ramp to more than 50,000 installations. Refine their machine-learning cycles to verify and improve the dynamic models they use to control topology definition. MJTelco will also use three separate operating environments - development/test, staging, and production - to meet the needs of running experiments, deploying new features, and serving production customers. Business Requirements Scale up their production environment with minimal cost, instantiating resources when and where needed in an unpredictable, distributed telecom user community. Ensure security of their proprietary data to protect their leading-edge machine learning and analysis. Provide reliable and timely access to data for analysis from distributed research workers Maintain isolated environments that support rapid iteration of their machine-learning models without affecting their customers. Technical Requirements Ensure secure and efficient transport and storage of telemetry data Rapidly scale instances to support between 10,000 and 100,000 data providers with multiple flows each. Allow analysis and presentation against data tables tracking up to 2 years of data storing approximately 100m records/day Support rapid iteration of monitoring infrastructure focused on awareness of data pipeline problems both in telemetry flows and in production learning cycles. CEO Statement Our business model relies on our patents, analytics and dynamic machine learning. Our inexpensive hardware is organized to be highly reliable, which gives us cost advantages. We need to quickly stabilize our large distributed data pipelines to meet our reliability and capacity commitments. CTO Statement Our public cloud services must operate as advertised. We need resources that scale and keep our data secure. We also need environments in which our data scientists can carefully study and quickly adapt our models. Because we rely on automation to process our data, we also need our development and test monitor so many data feeds, so we will rely on automation and infrastructure. Google Cloud's machine learning will allow our quantitative researchers to work on our high-value problems instead of problems with our data pipelines. You need to compose visualization for operations teams with the following requirements: Telemetry must include data from all 50,000 installations for the most recent 6 weeks (sampling once every minute) The report must not be more than 3 hours delayed from live data. The actionable report should only show suboptimal links. Most suboptimal links should be sorted to the top. Suboptimal links can be grouped and filtered by regional geography. User response time to load the report must be <5 seconds. You create a data source to store the last 6 weeks of data, and create visualizations that allow viewers to see multiple date ranges, distinct geographic regions, and unique installation types. You always show the latest data without any changes to your visualizations. You want to avoid creating and updating new visualizations each month. What should you do?
Options
ALook through the current data and compose a series of charts and tables, one for each possible
BLook through the current data and compose a small set of generalized charts and tables bound to criteria filters that allow value selection.
CExport the data to a spreadsheet, compose a series of charts and tables, one for each possible
DLoad the data into relational database tables, write a Google App Engine application that queries all rows, summarizes the data across each criteria, and then
How the community answered
(57 responses)
A
2% (1)
B
82% (47)
C
11% (6)
D
5% (3)
Explanation
Option B is correct because generalized charts with dynamic filter controls (date range, geography, installation type) automatically adapt to new data without requiring you to rebuild or update the visualizations - the filters let viewers slice the data themselves, satisfying all requirements with a single reusable dashboard.
Why the others fail:
A creates one chart per possible combination, which means you'd need to manually add new charts every month as data grows - exactly what the question says to avoid.
C exports to a spreadsheet, which breaks the "always show latest data without changes" requirement - spreadsheets are static snapshots, not live-connected data sources.
D is an over-engineered custom application that queries and summarizes all rows; it's expensive, complex to maintain, and unnecessary when filter-driven dashboards already solve the problem natively.
Memory tip: Think "filters, not folders" - whenever a question asks you to handle multiple dimensions (time, region, type) while avoiding maintenance overhead, the answer is one flexible view with parameters, not many static views.