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Modern Application Development I · End Term · 31 Aug 2025 · May 2025 term · Set QDB3

Question 14: Suppose you have these models in your Flask-SQLAlchemy a…

Question 14

+3 marksOne correct option

Suppose you have these models in your Flask-SQLAlchemy app:

python
class Author(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    books = db.relationship('Book', backref='author', cascade="all, delete")


class Book(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    title = db.Column(db.String(80))
    author_id = db.Column(db.Integer, db.ForeignKey('author.id'))

If you delete an Author instance from the database, what happens to their related Book instances?

  1. A
  2. B
  3. C
  4. D
Show answer

Correct answer

  • C
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Question 14 of 32 in the IIT Madras BS Modern Application Development I (MAD 1) End Term paper sat on 31 Aug 2025, in the May 2025 term (IIT M DIPLOMA FN EXAM QDD1 31 Aug 2025). It carries 3 marks.

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