6.2 Data Integrity Cambridge iAS 9618

What is data integrity?

• The accuracy, consistency, and reliability of data over time.

• The process of backing up data.

• Preventing data from being accessed.

• Encrypting all stored files.

What is the purpose of data validation?

• To check that data entered is reasonable and follows specific rules.

• To ensure data is error-free.

• To encrypt sensitive data.

• To delete duplicate records.

Which of the following is an example of data validation?

• A system rejecting an age entry of '300' in a form.

• A user manually checking a document for errors.

• Storing a copy of data for backup.

• Using a complex password to protect data.

What is the main purpose of a range check?

• To ensure a value falls within a predefined range.

• To check that the data is formatted correctly.

• To confirm that a field is not left blank.

• To compare two copies of data.

Which validation method checks whether an input follows a specific pattern (e.g., a phone number format)?

• Format check

• Presence check

• Length check

• Range check

What does a length check validate?

• That an input does not exceed a certain number of characters.

• That a field is not empty.

• That data falls within a certain range.

• That data has been entered correctly.

Which validation method ensures that a required field is not left blank?

• Presence check

• Format check

• Range check

• Length check

Which of the following best describes an existence check?

• Ensuring that a referenced item exists in a database.

• Verifying that an entered value is within a certain range.

• Checking for duplicate entries.

• Ensuring an input field is not left blank.

Which validation method ensures that a check digit is used to detect errors?

• Check digit validation

• Range check

• Format check

• Length check

What is data verification?

• The process of ensuring that data entered or transferred is identical to the original.

• The process of checking if data is within a valid range.

• The process of formatting data for storage.

• The process of encrypting data.