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Fundamentals of Data Analytics Flashcards

7 cards from real DAC practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

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  1. What is 'data granularity'?

    Answer: The level of detail in the data

    Granularity describes how detailed or summarized the data records are.

  2. In statistics, the standard deviation measures:

    Answer: The spread of data around the mean

    Standard deviation quantifies how much values deviate from the mean.

  3. Which of the following is an example of unstructured data?

    Answer: A social media post's text

    Free-form text like social media posts lacks a predefined schema, making it unstructured.

  4. What does 'data validation' primarily ensure?

    Answer: Data meets defined rules and formats

    Validation checks that data conforms to expected rules, types, and formats.

  5. A dashboard that updates continuously as new data arrives is described as:

    Answer: Real-time

    Real-time dashboards refresh automatically as new data streams in.

  6. Which measure describes the difference between the highest and lowest values?

    Answer: Range

    The range is the difference between the maximum and minimum values.

  7. What is the main risk of using a biased sample?

    Answer: Conclusions that don't represent the population

    A biased sample leads to conclusions that fail to generalize to the whole population.