WAEC Data Processing 2024 Objective — Question 23

Question 23 of 40 from the West African Examinations Council (WAEC) Data Processing 2024 Objective paper, with the correct answer and a full explanation.

23. How many primary keys exist in Figure 4? A.

A. 3Correct
B. 4
C. 5
D. 6

Explanation

A primary key is a field that uniquely identifies each record. In this scenario, there are 3 primary keys in total: customerId, orderId, productId.

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