SACA Smart Factory Data Analytics 5

Question 1

Which smart factory data strategy involves collecting raw data without a predefined schema to enable flexible future analysis?

Accepted Answer

Schema-on-read

Answer

Schema-on-read allows raw data to be stored in a data lake without enforcing structure at ingestion, applying the schema only when the data is queried.

Question 2

A factory wants to predict remaining useful life (RUL) of a motor using sensor history. Which model family is best suited for learning temporal dependencies in the degradation signal?

Accepted Answer

Recurrent Neural Network (RNN) / LSTM

Answer

RNNs and LSTMs are designed to capture long-range temporal dependencies in sequential data, making them well-suited for RUL prediction from sensor time-series.

Question 3

What does the term 'cold path' refer to in a lambda architecture deployed in a smart factory?

Accepted Answer

Batch processing of historical data for deep analytics and model retraining

Answer

In lambda architecture, the cold (batch) path processes large volumes of historical data at high latency to produce accurate, comprehensive analytics.

Question 4

Which data governance practice ensures that factory sensor data can be traced from its origin machine through every transformation to its final analytics output?

Accepted Answer

Data lineage tracking

Answer

Data lineage tracking records the full journey of data from source to output, enabling auditability, debugging, and regulatory compliance.

Question 5

A quality control model achieves 99% accuracy on a dataset where 99% of parts are non-defective. Why is this accuracy misleading?

Accepted Answer

The high accuracy reflects class imbalance, not genuine defect detection ability

Answer

When the negative class dominates, a model that always predicts 'non-defective' achieves high accuracy while completely failing to detect any real defects.

SACA - Smart Automation Certification Alliance Practice Test

SACA - Smart Automation Certification Alliance Practice Test

SACA Smart Factory Data Analytics 5