Neco 2023 Computer Studies Question 4

Practice essay / theory question 4 from the 2023 Neco Computer Studies examination. This question covers Binary conversion, Data compression, Database normalization, Data aggregation .

Neco 2023 Computer Studies Essay / Theory
Topics: Binary conversion Data compression Database normalization Data aggregation
Question 4 NECO • 2023 • COMPUTER_STUDIES • essay

A school maintains a database of its students' academic records. The following information is stored for each student: admission number (a 6‑digit numeric code), full name, date of birth, gender, and a binary file containing the student's photograph.

Question Parts

( a )
Convert the admission number 254839 into its equivalent binary representation and explain the steps involved.
( b )
The school wants to compress the photographs to reduce storage. Describe two lossless compression techniques that could be applied to the binary image files, and explain how each technique reduces file size.
( c )
The database is to be normalized to eliminate redundancy. Identify one functional dependency that violates the First Normal Form (1NF) in the current design and propose a modification to achieve 1NF.
( d )
The school plans to generate a report showing the number of male and female students in each grade. Suggest an appropriate data aggregation method and illustrate, using a simple example table, how the data would be grouped.

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About This Question

This is Neco 2023 Computer Studies Question 4. It is one of the essay questions from the 2023 Neco Computer Studies examination.

The question covers Binary conversion, Data compression, Database normalization, Data aggregation .

View More Neco 2023 Computer Studies Questions More Neco Practice Questions Back to Questions

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