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-write

Answer

Structured data warehousing

Answer

Normalized relational modeling

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

Decision tree

Answer

Naive Bayes classifier

Answer

K-nearest neighbors

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

Real-time processing of sensor streams with sub-second latency

Answer

Encrypted transmission of data to cold storage

Answer

Shutdown procedure for equipment during planned downtime

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 masking

Answer

Data sharding

Answer

Data partitioning

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

The model is overfitting to the training set

Answer

Accuracy is not a valid metric for classification tasks

Answer

The dataset is too small for meaningful evaluation

Question 6

In smart factory analytics, what is 'feature engineering' in the context of preparing sensor data for machine learning?

Accepted Answer

Transforming raw sensor readings into meaningful input variables that improve model performance

Answer

Selecting which physical sensors to install on the factory floor

Answer

Writing firmware for embedded sensor microcontrollers

Answer

Configuring network routing for sensor data streams

Question 7

Which standard communication model allows different smart factory devices from multiple vendors to exchange data using a unified information model?

Accepted Answer

OPC UA (OPC Unified Architecture)

Answer

Modbus RTU

Answer

RS-232 serial

Answer

CAN bus