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AIF-C01 practice question: AI, ML and deep learning basics (3 of 3)

Fundamentals of AI and ML A free question from our original AIF-C01 practice exam. Try it, then open the answer to see why each option is right or wrong.

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A water utility records the pressure in every pipe once a minute and wants to forecast pressure for the next hour to prevent bursts.

Each reading is stored with its timestamp, and the order of the readings matters.

How is this data BEST described?

Choose one answer.

  1. A. Image data, because the readings can be drawn as a line chart for the operators.
  2. B. Unstructured text data, because the readings are logged as messages from each pipe.
  3. C. Categorical data, because each pipe falls into a fixed group, such as its material.
  4. D. Time-series data, because the values are recorded and ordered by time.
Show the answer and explanation

Answer: D

  • A. Wrong: Image data is made of pixels from photos or scans. A chart drawn from the readings does not turn the readings into an image.
  • B. Wrong: Unstructured text is free-form writing such as emails or reports. Numeric sensor readings are structured, even when they are logged.
  • C. Wrong: Categorical data places items into named classes, such as pipe material. Pressure values are continuous numbers recorded over time.
  • D. Right: Correct. Time-series data is a sequence of values indexed by time, and forecasting relies on the order of past readings. Learn more: What is Amazon Forecast? (opens in a new tab)

Explanation

Time-series data is a sequence of measurements recorded at regular or irregular points in time, and the ordering carries the information a forecast needs. The question tests recognizing the data type from how it is recorded and what it will be used for.

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