Neco 2021 Computer Studies Question 4

Practice essay / theory question 4 from the 2021 Neco Computer Studies examination. This question covers Data and Information .

Neco 2021 Computer Studies Essay / Theory
Topic: Data and Information
Question 4 NECO • 2021 • COMPUTER_STUDIES • essay

A secondary school maintains a student information system that stores personal details, grades and attendance records.

Question Parts

( a )
Explain the difference between data and information, and illustrate the difference with an example taken from the student information system.
( b )
Grades are stored as percentages. Convert a grade of 78% to its 8‑bit unsigned binary representation, showing each step of the conversion.
( c )
Attendance for each pupil is recorded as a string of ‘P’ (present) and ‘A’ (absent) for a 30‑day month. Propose a simple loss‑less compression technique suitable for this data and explain how it would work, including a brief illustration using the 10‑day pattern P P P A A P P A A A.
( d )
Discuss two advantages of using a relational database to store the student information system instead of a flat file, and mention one potential disadvantage.

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About This Question

This is Neco 2021 Computer Studies Question 4. It is one of the essay questions from the 2021 Neco Computer Studies examination.

The question covers Data and Information .

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