CMO Data Collection & Monitoring 2 — Questions and Answers
Question 1: Which sampling strategy collects data at irregular intervals based on triggered events rather than fixed time schedules?
- Periodic sampling
- Event-driven sampling (Correct answer)
- Stratified sampling
- Systematic sampling
Correct answer: Event-driven sampling
Event-driven sampling captures data when specific conditions or triggers occur, making it efficient for monitoring infrequent but important events.
Question 2: A mobile data collection app loses network connectivity during a field survey. What is the recommended handling approach?
- Abort the session and restart when connected
- Store data locally and sync when connectivity is restored (Correct answer)
- Skip affected records and continue
- Prompt the user to retry immediately
Correct answer: Store data locally and sync when connectivity is restored
Offline-first design stores data locally on-device and queues it for synchronization once network connectivity is re-established.
Question 3: In Mobilyze monitoring dashboards, what does a 'stale data' alert typically indicate?
- Data values are outside acceptable ranges
- No new data has been received within the expected reporting window (Correct answer)
- The database storage is near capacity
- Data encryption has failed
Correct answer: No new data has been received within the expected reporting window
A stale data alert fires when a data source has not reported within its configured freshness threshold, signaling a potential collection interruption.
Question 4: Which data validation technique flags a record when a numeric sensor reading exceeds three standard deviations from the historical mean?
- Range check
- Format check
- Statistical outlier detection (Correct answer)
- Referential integrity check
Correct answer: Statistical outlier detection
Statistical outlier detection uses measures like standard deviation to identify values that are anomalous compared to established historical patterns.
Question 5: A field operator notices that GPS coordinates recorded during data collection show a consistent 50-meter offset from known locations. This is most likely caused by:
- Poor cellular signal
- GPS datum mismatch between device and base map (Correct answer)
- Insufficient RAM on the collection device
- Incorrect form field mapping
Correct answer: GPS datum mismatch between device and base map
A systematic spatial offset usually results from a coordinate reference system (datum) mismatch between the recording device and the reference layer.
Question 6: What is the primary purpose of a data collection audit log in a Mobilyze deployment?
- To compress data before transmission
- To record who collected what data and when for accountability and traceability (Correct answer)
- To automatically correct invalid field entries
- To manage user license assignments
Correct answer: To record who collected what data and when for accountability and traceability
Audit logs provide a tamper-evident record of data collection events, enabling accountability, traceability, and compliance verification.
Question 7: When configuring a monitoring alert threshold, setting the value too close to normal operating levels will most likely result in:
- Missed detections of critical events
- Excessive false-positive alerts (Correct answer)
- Slower data transmission rates
- Increased storage consumption
Correct answer: Excessive false-positive alerts
Thresholds set too close to normal operating values generate excessive false positives, causing alert fatigue and reducing operational efficiency.
CMO Data Collection & Monitoring 2
Which sampling strategy collects data at irregular intervals based on triggered events rather than fixed time schedules?