WAEC Computer Studies 2024 Objective — Question 38
Question 38 of 50 from the West African Examinations Council (WAEC) Computer Studies 2024 Objective paper, with the correct answer and a full explanation.
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38. Which of the following statements about index is true?
- A. It is a data structure that reduces the speed of data retrieval operations on a database table.
- B. It is used to quickly locate data without searching every row in a table.Correct
- C. It is created using only two rows of a database table to uniquely identify each record.
- D. It allows relational database to split and store data in different tables, while linking disparate items.
Explanation
An index data structure can be used to quickly locate data without searching every row in a table every time a database table is accessed.
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