Data Quality

Description: Test your knowledge on Data Quality with this comprehensive quiz.
Number of Questions: 15
Created by:
Tags: data quality data science data integrity
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Which of the following is NOT a dimension of data quality?

  1. Accuracy

  2. Completeness

  3. Consistency

  4. Timeliness

  5. Relevance


Correct Option: E
Explanation:

Relevance is not a dimension of data quality. The dimensions of data quality are accuracy, completeness, consistency, and timeliness.

What is the process of ensuring that data is accurate, complete, consistent, and timely?

  1. Data profiling

  2. Data cleansing

  3. Data validation

  4. Data governance

  5. Data integration


Correct Option: B
Explanation:

Data cleansing is the process of ensuring that data is accurate, complete, consistent, and timely.

Which of the following is a common data quality issue?

  1. Missing values

  2. Inconsistent data

  3. Duplicate data

  4. Outdated data

  5. All of the above


Correct Option: E
Explanation:

All of the above are common data quality issues.

What is the purpose of data profiling?

  1. To identify data quality issues

  2. To understand the distribution of data

  3. To identify outliers

  4. To identify duplicate data

  5. All of the above


Correct Option: E
Explanation:

Data profiling is used to identify data quality issues, understand the distribution of data, identify outliers, and identify duplicate data.

Which of the following is a data quality metric?

  1. Accuracy

  2. Completeness

  3. Consistency

  4. Timeliness

  5. All of the above


Correct Option: E
Explanation:

Accuracy, completeness, consistency, and timeliness are all data quality metrics.

What is the difference between data accuracy and data precision?

  1. Accuracy is the degree to which data is correct, while precision is the degree to which data is repeatable.

  2. Accuracy is the degree to which data is consistent, while precision is the degree to which data is reliable.

  3. Accuracy is the degree to which data is complete, while precision is the degree to which data is timely.

  4. Accuracy is the degree to which data is relevant, while precision is the degree to which data is useful.

  5. None of the above


Correct Option: A
Explanation:

Accuracy is the degree to which data is correct, while precision is the degree to which data is repeatable.

What is the purpose of data validation?

  1. To ensure that data is accurate

  2. To ensure that data is complete

  3. To ensure that data is consistent

  4. To ensure that data is timely

  5. All of the above


Correct Option: E
Explanation:

Data validation is used to ensure that data is accurate, complete, consistent, and timely.

Which of the following is a data quality best practice?

  1. Use data profiling to identify data quality issues

  2. Use data cleansing to correct data quality issues

  3. Use data validation to ensure that data is accurate

  4. Use data governance to manage data quality

  5. All of the above


Correct Option: E
Explanation:

All of the above are data quality best practices.

What is the impact of poor data quality on decision-making?

  1. Poor data quality can lead to incorrect decisions

  2. Poor data quality can lead to wasted resources

  3. Poor data quality can lead to lost revenue

  4. Poor data quality can lead to all of the above

  5. None of the above


Correct Option: D
Explanation:

Poor data quality can lead to incorrect decisions, wasted resources, lost revenue, and all of the above.

What is the role of data governance in data quality?

  1. Data governance provides a framework for managing data quality

  2. Data governance establishes data quality standards

  3. Data governance monitors data quality

  4. Data governance enforces data quality

  5. All of the above


Correct Option: E
Explanation:

Data governance provides a framework for managing data quality, establishes data quality standards, monitors data quality, and enforces data quality.

What is the difference between data quality and data integrity?

  1. Data quality is the degree to which data is accurate, complete, consistent, and timely, while data integrity is the degree to which data is protected from unauthorized access, use, or disclosure.

  2. Data quality is the degree to which data is relevant, while data integrity is the degree to which data is reliable.

  3. Data quality is the degree to which data is useful, while data integrity is the degree to which data is secure.

  4. Data quality is the degree to which data is valuable, while data integrity is the degree to which data is trustworthy.

  5. None of the above


Correct Option: A
Explanation:

Data quality is the degree to which data is accurate, complete, consistent, and timely, while data integrity is the degree to which data is protected from unauthorized access, use, or disclosure.

What are the three main types of data quality issues?

  1. Accuracy, completeness, and consistency

  2. Timeliness, relevance, and usability

  3. Security, privacy, and compliance

  4. All of the above

  5. None of the above


Correct Option: A
Explanation:

The three main types of data quality issues are accuracy, completeness, and consistency.

What is the difference between data quality and data governance?

  1. Data quality is the degree to which data is accurate, complete, consistent, and timely, while data governance is the process of managing data quality.

  2. Data quality is the degree to which data is relevant, while data governance is the process of ensuring that data is used for its intended purpose.

  3. Data quality is the degree to which data is useful, while data governance is the process of making data available to those who need it.

  4. Data quality is the degree to which data is valuable, while data governance is the process of protecting data from unauthorized access.

  5. None of the above


Correct Option: A
Explanation:

Data quality is the degree to which data is accurate, complete, consistent, and timely, while data governance is the process of managing data quality.

What are the four main dimensions of data quality?

  1. Accuracy, completeness, consistency, and timeliness

  2. Relevance, usability, value, and trustworthiness

  3. Security, privacy, compliance, and auditability

  4. All of the above

  5. None of the above


Correct Option: A
Explanation:

The four main dimensions of data quality are accuracy, completeness, consistency, and timeliness.

What is the difference between data quality and data integrity?

  1. Data quality is the degree to which data is accurate, complete, consistent, and timely, while data integrity is the degree to which data is protected from unauthorized access, use, or disclosure.

  2. Data quality is the degree to which data is relevant, while data integrity is the degree to which data is reliable.

  3. Data quality is the degree to which data is useful, while data integrity is the degree to which data is secure.

  4. Data quality is the degree to which data is valuable, while data integrity is the degree to which data is trustworthy.

  5. None of the above


Correct Option: A
Explanation:

Data quality is the degree to which data is accurate, complete, consistent, and timely, while data integrity is the degree to which data is protected from unauthorized access, use, or disclosure.

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