Given the Flask app: from flask import Flask from flask_cors import CORS app = Flask(name) CORS(app, resources={r"/api/": {"origins": "http://localhost:3000"}}) @app.route('/api/data') def data(): return {"msg": "Success"} frontend code: fetch("http://localhost:5000/api/data") .then(res => res.json()) .then(data => console.log(data)); What will happen when run from a Vue app hosted at http://localhost:5173 ?

Modern Application Development II · End Term · 31 Aug 2025 · May 2025 term · Set QIB3

Question 26: Given the Flask app: frontend code: What will happen whe…

Question 26

+4.5 marksOne correct option

Given the Flask app:

python

1from flask import Flask
2from flask_cors import CORS
3
4app = Flask(__name__)
5CORS(app, resources={r"/api/*": {"origins": "http://localhost:3000"}})
6
7@app.route('/api/data')
8def data():
9    return {"msg": "Success"}

frontend code:

javascript

1fetch("http://localhost:5000/api/data")
2  .then(res => res.json())
3  .then(data => console.log(data));

What will happen when run from a Vue app hosted at http://localhost:5173?

A
Request succeeds
B
CORS error occurs
C
404 error
D
The server crashes

Show answer

Correct answer

B
CORS error occurs

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Question 26 of 32 in the IIT Madras BS Modern Application Development II (MAD 2) End Term paper sat on 31 Aug 2025, in the May 2025 term (IIT M IMPROVEMENT AN EXAM QIB3 31 Aug 2025). It carries 4.5 marks.

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MAD 2 End Term — 31 Aug 2025, Set QDD3 · question 26

Question 26: Given the Flask app: frontend code: What will happen whe…

Question 26

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