Validation and Verification

Front

What is validation in the context of data entry?

Back

Validation is the process by which a programme automatically verifies if data is acceptable before allowing it into a computer system.

Front

What should happen if data is refused during validation?

Back

A notice stating the reason for the rejection should be sent out along with another chance for the data entry.

Front

What are the types of validation checks?

Back

Range checks, Length checks, Type checks, Presence checks, Format checks, Check digits.

Front

What does a range check do?

Back

A range check checks that the value of a number is between an upper value and a lower value.

Front

What is an example of a range check for percentage marks?

Back

Checking that percentage marks are between 0 and 100 inclusive.

Front

What does a length check ensure?

Back

That the data entered is a reasonable number of characters, for example, a family name could be between two and thirty characters.

Front

What does a type check verify?

Back

A type check verifies that the data entered is of a given data type, such as ensuring an age input is an integer.

Front

What is a presence check?

Back

A presence check ensures that some data has been entered and the value has not been left blank.

Front

What is a format check?

Back

A format check ensures data adheres to a specified structure, such as date or number formats.

Front

What is a check digit?

Back

A check digit is a single digit appended to a numerical code, computed using a specific algorithm, primarily to detect errors or validate the accuracy of the code.