2.1 Test your knowledge on data cleaning

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Last updated 12:17 AM on 8/6/26
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4 Terms

1
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Which data professionals are most often responsible for ensuring that data is available, secure, and backed up to prevent loss?

A. Data engineers

B. Data warehousing specialists

C. Data analysts

D. Dara scientist

B. Data warehousing specialists

2
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Fill in the blank: If a dataset contains ___, this is an indication that those values do not exist in the dataset.

A. zeroes

B. outliers

C. nulls

D. anomalies

C. nulls

3
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A data professional works in a spreadsheet column that can only contain six-digit customer ID numbers. They ensure the data points in the column are always exactly six-digits long using which data analytics tool?

A. Data formatting

B. Labels

C. Field length

D. Filtering

C. Field length

4
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Fill in the blank: Data validation is a tool for checking the ___ of data before adding or importing it.

A. accuracy and quality

B. origin and age

C. size and structure

D. accessibility and openness

A. accuracy and quality