Other Applications DY0-001 Practice Questions (Page 1)

Questions 1–5

1. 1application · medium

   A rideshare company wants to detect organized fraud rings where multiple rider accounts frequently request trips from the same set of driver accounts, often with overlapping trips. They have a large dataset of trip records including rider ID, driver ID, timestamps, and GPS coordinates. Which approach would be most effective for identifying these coordinated fraud rings?

   • ATrain a supervised classification model on labeled historical fraud cases using rider and driver demographic features.
   • BApply a time-series anomaly detection model to the number of trips per driver to flag drivers with unusually high trip counts.
   • CBuild a graph where riders and drivers are nodes, and edges represent completed trips; then apply community detection to find densely connected subgraphs.
   • DUse a clustering algorithm like k-means on the GPS coordinates of trip origins to find geographic hotspots of fraudulent activity.
   Reveal Solution Discussion Select an answer first
2. 2application · medium

   A data scientist is analyzing an electrocardiogram (ECG) signal to detect arrhythmias. The signal is sampled at 250 Hz and contains both low-frequency baseline wander and high-frequency noise. Which signal processing technique should be used to isolate the clinically relevant frequency band?

   • AApply a low-pass filter with a cutoff at 0.5 Hz to remove high-frequency noise.
   • BApply a high-pass filter with a cutoff at 100 Hz to remove low-frequency baseline wander.
   • CApply a band-pass filter to retain frequencies between 0.5 Hz and 100 Hz, which are typical for ECG analysis.
   • DApply a notch filter at 60 Hz to remove power line interference.
   Reveal Solution Discussion Select an answer first
4. 3foundation · easy

   Why is anomaly detection significant in network security?

   • AIt can predict the exact time of future attacks
   • BIt can automatically patch vulnerabilities in the network
   • CIt can encrypt network traffic to prevent attacks
   • DIt can identify unusual network traffic that may indicate an intrusion
   Reveal Solution Discussion Select an answer first
5. 4application · medium

   A logistics company wants to find the most efficient delivery route for a fleet of vehicles. They have a graph where nodes represent delivery locations and edges represent roads with travel times. Which graph theory concept is most directly applicable to finding the shortest path between two locations?

   • AGraph coloring, which assigns colors to nodes to avoid conflicts.
   • BDijkstra's algorithm, which finds the shortest path from a source node to all other nodes in a weighted graph.
   • CKruskal's algorithm, which finds the minimum spanning tree of a graph.
   • DDepth-first search (DFS), which explores a graph by going as deep as possible before backtracking.
   Reveal Solution Discussion Select an answer first
6. 5foundation · easy

   Which of the following best defines an 'edge' in a graph?

   • AA measure of how central a node is in the network
   • BA group of nodes that are densely connected to each other
   • CA connection between two nodes that represents a relationship
   • DA single entity or object in the graph
   Reveal Solution Discussion Select an answer first