Data Integrity control uses _______
2013
Data Integrity control uses _______
- A.
Upper and lower limits on numeric data.
- B.
Passwords to prohibit unauthorised access to files.
- C.
Data dictionary to keep the data
- D.
Data dictionary to find last access of data
Attempted by 171 students.
Show answer & explanation
Correct answer: A
Answer: Upper and lower limits on numeric data.
Why: Data integrity controls validate the accuracy and consistency of data values. Range checks (upper and lower limits) are a direct example because they prevent values outside acceptable bounds from being stored.
Range checks: ensure numeric values fall within permitted limits.
Format and type checks: enforce correct data types and formats (for example, dates or numeric types).
Check digits and validation rules: detect input and transcription errors.
Note: Passwords and access controls protect access and confidentiality but do not validate data correctness; audit logs track access history.