In a Celery setup, we use two separate Redis databases: Figure from the original question paper Which of the following best explains the conceptual difference between the broker and the backend?

(D) The broker stores task requests until a Celery worker picks and executes them, while the backend stores the task result after execution.

(A) The backend is only needed when tasks involve sending emails; for tasks that only read from the database, only the broker is required.

(B) The broker and backend must always use different port numbers; using the same Redis port for both would cause a conflict.

(C) The broker distributes tasks evenly across multiple Celery workers, while the backend tracks which worker is currently processing which task.

Modern Application Development II · End Term · 13 Sept 2026 · May 2026 term · Set S2

Question 5: In a Celery setup, we use two separate Redis databases: W…

Question 5

+4.5 marksOne correct option

In a Celery setup, we use two separate Redis databases:

Which of the following best explains the conceptual difference between the broker and the backend?

A
The backend is only needed when tasks involve sending emails; for tasks that only read from the database, only the broker is required.
B
The broker and backend must always use different port numbers; using the same Redis port for both would cause a conflict.
C
The broker distributes tasks evenly across multiple Celery workers, while the backend tracks which worker is currently processing which task.
D
The broker stores task requests until a Celery worker picks and executes them, while the backend stores the task result after execution.

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Correct answer

D
The broker stores task requests until a Celery worker picks and executes them, while the backend stores the task result after execution.

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Question 5 of 31 in the IIT Madras BS Modern Application Development II (MAD 2) End Term paper sat on 13 Sept 2026, in the May 2026 term (Modern Application Development Ii 13 Sep 26 (Session 2)). It carries 4.5 marks.

Question 5: In a Celery setup, we use two separate Redis databases: W…

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