A Ch2

Original Data Source: 3008. Input Data: 3018.

What type of error is this?

• Data Source Error

• Transcription Error

• Transposition Error

What type of error occurs when someone provides an email address that does not exist?

• Data source error

• Transcription error

• Transposition error

Which of the following statements is false?

• Data validation is done by computers.

• Data verification is done by humans.

• Data validation can ensure that the data is error-free.

• GIGO means "Garbage in, Garbage out".

The age of a student must be a number. Which type of check is this?

• Length check

• Type check

• Format check

• Presence check

The email address must contain an "@" symbol. Which check is being used?

• Length check

• Presence check

• Type check

• Format check

In an MCQ quiz, students can only select one of the four choices for each question.

Which type of check is being used?

• Type check

• Fixed-value check

• Presence check

• Consistency check

We should use ________ to store the name of a student, and __________ to store whether a student passes a test or not.

• String; Boolean

• String; Integer

• Integer; Boolean

• String; String

The HKID uses the last digit to validate the numbers.

What is this method called?

• Check sum

• Length check

• Check digit

• Number check

If we use an odd parity check, which of the following data sets is not valid?

• 1100 1011

• 1011 1111

• 1000 0011

• 1100 1001

Which of the following is not a method of data verification?

• Inputting data twice

• Check digit

• Double data entry

• Proofreading data