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Business Data Management · End Term · 21 Dec 2025 · September 2025 term

Question 17: You have the following Tables:\ ● Customer_Master(CustID…

Question 17

+1 markOne correct option

You have the following Tables:
● Customer_Master(CustID) with 10,000 active customers. ● Transactions(CustID, TxnDate) with all purchase records.
You want a list of customers who have been active in the past (at least one transaction ever) but have made no purchases in the last 6 months. Conceptually, which operation on sets best describes this logic?
Let: ● A = set of customers with at least one transaction in the last 6 months. ● B = set of customers with at least one transaction more than 6 months ago.

  1. A

    A ∩ B

  2. B

    B − A

  3. C

    A ∪ B

  4. D

    A × B

Show answer

Correct answer

  • B

    B − A

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Question 17 of 50 in the IIT Madras BS Business Data Management (BDM) End Term paper sat on 21 Dec 2025, in the September 2025 term (Business Data Management 18 Dec 25). It carries 1 mark.

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