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Subjects · Leaving Cert Computer Science

Leaving Cert Computer Science: Data analytics & data quality

How often Data analytics & data quality comes up on the Computer Science papers, every year it was asked, and questions to try.

HL Asked on 3 of the last 5 Higher Level papers, most recently in 2025. most years

OL Asked on 4 of the last 5 Ordinary Level papers, most recently in 2024. most years

Data analytics & data quality, Higher Level(6 marks)

Quick ones on Data analytics & data quality.

(a)A form checks that an age entered is between 12 and 20. What kind of validation check is this?
  1. Presence check
  2. Range check
  3. Format check
(b)A form refuses to submit if the email box is left empty. What check is this?
  1. Type check
  2. Length check
  3. Presence check
(c)The number of students in a class is what type of data?
  1. Discrete
  2. Qualitative
  3. Continuous
Show the answers

(a) Range check

(b) Presence check

(c) Discrete

Your turn: Higher Level questions on Data analytics & data quality.

Higher Level

Asked on 3 of the last 5 Higher Level papers, most recently in 2025. most years

Every paper, year by year

YearWhere it came up
2025C16
2024B15
2023Not asked
2022C16
2021Not asked

Links open the State Examinations Commission’s paper for that year.

More Data analytics & data quality questions

Data analytics & data quality, 3 marks

A sign-up form asks for the email address twice. What is this?

  1. A range check
  2. A presence check
  3. Verification
Show the answer

Verification

Verification checks that data was typed or copied accurately. Validation only checks data is sensible: a valid-looking email can still have a typo.

Ordinary Level

Asked on 4 of the last 5 Ordinary Level papers, most recently in 2024. most years

Every paper, year by year

YearWhere it came up
2025Not asked
2024A10, A12
2023A9
2022A9
2021A12

Links open the State Examinations Commission’s paper for that year.

More Data analytics & data quality questions

Data analytics & data quality, 2 marks

A check that a form field is not left empty is a…

  1. Range check
  2. Format check
  3. Presence check
Show the answer

Presence check

A presence check makes sure required data, like a name or email, has been entered before the form is accepted.

Data analytics & data quality, 2 marks

Checking that a mark is between 0 and 100 is a…

  1. Presence check
  2. Range check
  3. Length check
Show the answer

Range check

A range check tests that a value is between a lowest and highest limit, e.g. if mark >= 0 and mark <= 100.

Data analytics & data quality, 3 marks

Checking that an Irish mobile number has exactly 10 digits is a…

  1. Length check
  2. Range check
  3. Presence check
Show the answer

Length check

A length check counts the characters, e.g. len(number) == 10. It can't tell if the number is real, only that it is the right length.

Other Computer Science topics

All of Leaving Cert Computer Science