DA0-002 Data Acquisition and Preparation Practice Question
Exhibit
2023-08-15 14:32:10 ERROR: Data conversion failed for column 'salary' in row 45: value 'N/A' cannot be converted to numeric.
Refer to the exhibit. What data quality issue is indicated?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Non-standardized data entry
The error shows that a non-numeric value 'N/A' is present in a numeric column, indicating non-standardized data entry. Duplication, inconsistency, or outliers are not directly shown.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Data inconsistency
Why it's wrong here
Inconsistency would involve conflicting values, not just a conversion failure.
- ✓
Non-standardized data entry
Why this is correct
The use of 'N/A' in a numeric field indicates lack of standardization.
- ✗
Outlier
Why it's wrong here
An outlier is an extreme value, not a non-numeric string.
- ✗
Data duplication
Why it's wrong here
The log does not mention duplicate records.
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