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Data Analytics Certification Exam Questions and Answers.

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What is a row in a dataset? - Answer Horizontal record of data. What is a column in a dataset? - Answer Vertical field representing a variable. What is a table? - Answer 2D structure made of rows and columns. Machine learning is a subset of what? - Answer Artificial Intelligence. When is machine learning useful? - Answer When rules can't be coded easily and lots of data exist. When is machine learning NOT ideal? - Answer When rules are simple and datasets are small. What is sampling bias? - Answer Some groups are over- or under-represented in the sample. What is selection bias? - Answer Flawed process for choosing participants. Examples of aggregate functions - Answer SUM, COUNT, AVG. What does a scatter plot show? - Answer Relationship between two continuous variables. When should you not use a pie chart? - Answer When there are more than 4-5 categories. What does a box plot help identify? - Answer Outliers. What is a pivot table used for? - Answer Summarizing, grouping, and aggregating data. What happens to granularity when data is aggregated? - Answer It decreases. What is metadata? - Answer Data that describes other data.

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Data Analytics Certification Exam
Questions and Answers.
What is a row in a dataset? - Answer Horizontal record of data.



What is a column in a dataset? - Answer Vertical field representing a variable.



What is a table? - Answer 2D structure made of rows and columns.



Machine learning is a subset of what? - Answer Artificial Intelligence.



When is machine learning useful? - Answer When rules can't be coded easily and lots of data
exist.



When is machine learning NOT ideal? - Answer When rules are simple and datasets are
small.



What is sampling bias? - Answer Some groups are over- or under-represented in the sample.



What is selection bias? - Answer Flawed process for choosing participants.



Examples of aggregate functions - Answer SUM, COUNT, AVG.



What does a scatter plot show? - Answer Relationship between two continuous variables.



When should you not use a pie chart? - Answer When there are more than 4-5 categories.



What does a box plot help identify? - Answer Outliers.



What is a pivot table used for? - Answer Summarizing, grouping, and aggregating data.



What happens to granularity when data is aggregated? - Answer It decreases.



What is metadata? - Answer Data that describes other data.

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