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MAD II · End Term · 31 Aug 2025 (Forenoon)

32 questions · 100 marks · 90 min

Answer key Take as mock

Indian Institute of Technology Madras

BS Degree Programme · Examination & Study Paper

Modern Application Development II

End Term · 31 Aug 2025 (Forenoon)

Official Paper

Examination Instructions & Guidelines

Solve on notebook/paper first before checking solutions.
MCQ: Exactly 1 option is correct. Negative marking applies.
MSQ: One or more options correct. Select all to score.
Scientific calculator allowed for all calculations.
Official answer key is sealed at the end of this sheet.

Q1MCQ2 Marks·Choose one option
Asked 2 times Key ↓
In a message queue system, if the consumer is slower than the producer, what is likely to occur first?
1. AMessages will be dropped
2. BThe producer will block until the consumer is ready
3. CMessages will accumulate in the queue
4. DThe consumer will speed up automatically
Q2MCQ2 Marks·Choose one option
Asked 2 times Key ↓
1. AThe component will reload when data changes
2. BThe DOM updates automatically when the underlying reactive data changes
3. CAll function calls become asynchronous
4. DIt disables direct access to state
Q3MCQ2 Marks·Choose one option
Asked 2 times Key ↓
In Flask, what is the main benefit of using the @cache.cached() decorator?
1. AIt stores output in session storage
2. BIt skips route execution for repeated inputs
3. CIt enables token authentication
4. DIt sends compressed response headers
Q4MCQ2 Marks·Choose one option
Asked 2 times Key ↓
What is the primary purpose of CORS (Cross-Origin Resource Sharing)?
1. ATo encrypt data between client and server
2. BTo control which domains can access resources
3. CTo compress HTTP responses
4. DTo authenticate users across applications
Q5MSQ2 Marks·Choose all correct options
Asked 2 times Key ↓
Which of the following practices help protect against supply chain attacks?
1. AVersion pinning
2. BStoring keys only in environment variables
3. CReduce Dependencies
4. DUsing only packages with over 1000 stars on GitHub
Q6MSQ2 Marks·Choose all correct options
Asked 2 times Key ↓
Which of the following factors directly affect the speed and performance of a web page load?
1. AThe number of CSS selectors in the stylesheet
2. BNumber of HTTP requests made
3. CFile size of resources (like images, JS)
4. DUse of semantic HTML tags
Q7MSQ2 Marks·Choose all correct options
Asked 2 times Key ↓
Which of the following is/are the potential benefits of using a message broker?
1. AA message broker allows two servers in a network to directly communicate with each other, without an intermediary.
2. BA message broker makes the network scalable for adding more servers to the network.
3. CA message broker can be used for batch processing of messages.
4. DA message broker is not suited in case of traffic spikes, as messages are retained in the queue until processed.
Q8MSQ2 Marks·Choose all correct options
Asked 3 times Key ↓
Which statements about webhooks are correct?
1. AThey enable real-time data delivery
2. BThey require polling from the client
3. CThey use HTTP POST requests typically
4. DThey're designed for server-to-server communication
Q9MCQ3 Marks·Choose one option
Asked 2 times Key ↓
A popular e-commerce platform needs to notify multiple third-party services (inventory management, email marketing, analytics) whenever a customer places an order. The development team is considering different approaches to handle these notifications. Scenario: When an order is placed, the system needs to: ● Update inventory levels in an external warehouse system ● Send a welcome email through a third-party email service ● Log analytics data to an external tracking service ● Update customer loyalty points in a CRM system Which of the following statements about using webhooks for this scenario is MOST accurate?
1. AWebhooks are not suitable for this use case because they require the e- commerce platform to continuously poll each third-party service to check if they're ready to receive data, which would create unnecessary network overhead.
2. BWebhooks provide an ideal solution as they allow the e-commerce platform to push real-time notifications to all subscribed third-party services immediately when an order is placed, eliminating the need for these services to repeatedly poll for updates.
3. CWebhooks should be avoided in this scenario because they operate synchronously, meaning the customer's order placement would be delayed until all third-party services have successfully processed their notifications.
4. DWebhooks are primarily designed for read-only operations and cannot handle complex data payloads like order information, making them unsuitable for e-commerce transaction notifications.
Q10MCQ3 Marks·Choose one option
Asked 2 times Key ↓
What is the main advantage of using caching in a Flask-based web application?
1. AIt eliminates the need for client-side rendering
2. BIt encrypts data transmission between server and client
3. CIt avoids the need for database interactions completely
4. DIt reduces server load by reusing responses for repeated requests
Q11MCQ3 Marks·Choose one option
Asked 5 times Key ↓
1. AR P Q S
2. BP R S Q
3. CR P S Q
4. DR S P Q
Q12MCQ3 Marks·Choose one option
Asked 4 times Key ↓
1. A
2. B
3. C
4. D
Q13MCQ3 Marks·Choose one option
Key ↓
1. A
2. B
3. C
4. D
Q14MCQ3 Marks·Choose one option
Key ↓
1. Aobject, undefined, true, false
2. Bnull, undefined, false, false
3. Cobject, undefined, false, false
4. Dnull, undefined, true, true
Q15MCQ3 Marks·Choose one option
Key ↓
1. AAdmin component
2. BUnauthorized component
3. CBlank screen
4. DVue throws a routing error
Q16MCQ3 Marks·Choose one option
Asked 2 times Key ↓
1. A
2. B
3. C
4. D
Read the passage below, then answer Q17–Q19
Based on the above data, answer the given subquestions.
Q17MCQ3 Marks·Choose one option
Key ↓
After step 2 (selecting two tasks), what is the value of selectedTasks.length?
1. A0
2. B1
3. C2
4. D3
Q18MCQ3 Marks·Choose one option
Key ↓
What happens when the user clicks "Select" on Design UI again (step 3)?
1. AIt is added again, making the total 3
2. BIt replaces the previous task
3. CNothing changes, no duplicate is added
4. DVue throws a warning about duplicate keys
Q19MSQ3 Marks·Choose all correct options
Key ↓
Which of the following statements about this component setup are true?
1. A
2. B
3. C
4. D
Q20MSQ3 Marks·Choose all correct options
Asked 3 times Key ↓
Which factors directly impact the Lighthouse "Performance" score?
1. AFirst Contentful Paint (FCP)
2. BHTTPS usage
3. CTime to Interactive (TTI)
4. DLayout Shift
Q21MSQ3 Marks·Choose all correct options
Asked 3 times Key ↓
Which statements are true about handling background tasks in Flask with Celery?
1. ACelery allows long-running tasks to be executed asynchronously
2. BPolling is a strategy to check task status periodically
3. CUsing time.sleep() blocks the event loop and is recommended for async tasks
4. DFlask + Celery + Redis is a common stack for async task management
Q22MSQ3 Marks·Choose all correct options
Asked 2 times Key ↓
Which of the following are true about mutations and actions in Vuex?
1. AMutations can be asynchronous
2. BActions can be asynchronous
3. COnly actions can call APIs through fetch call
4. DMutations should modify state directly
Q23MSQ3 Marks·Choose all correct options
Asked 3 times Key ↓
1. AThe class "active" will only be applied to the div element if the variable "isActive" evaluates to true.
2. BThe class "text-bold" will always be applied to the div element regardless of the "hasBoldText" variable value.
3. CThe class "disabled" will be applied to the div element when the variable "isEnabled" evaluates to false.
4. DAll three classes ("active", "text-bold", "disabled") will always be applied to the div element.
5. EThe class "text-bold" will only be applied if the variable "hasBoldText" exists and evaluates to a truthy value.
6. FIf "isEnabled" is undefined, the "disabled" class will not be applied to the div element.
Q24MCQ4.5 Marks·Choose one option
Asked 2 times Key ↓
1. A
2. B
3. C
4. D
Q25MCQ4.5 Marks·Choose one option
Asked 5 times Key ↓
1. A
2. B
3. C
4. D
Q26MCQ4.5 Marks·Choose one option
Asked 4 times Key ↓
1. A
2. B
3. C
4. D
Q27MCQ4.5 Marks·Choose one option
Asked 2 times Key ↓
If requests for user IDs 1, 2, 1 are made within 5 minutes, what's the total response time?
1. A15 seconds
2. B10 seconds
3. C5 seconds
4. D0 seconds
Q28MCQ4.5 Marks·Choose one option
Asked 4 times Key ↓
1. A
2. B
3. C
4. D
Q29MCQ4.5 Marks·Choose one option
Key ↓
1. AResult: null
2. BError: HTTP 404, Result: null
3. CError: HTTP 404
4. DUnhandled promise rejection
Q30MCQ4.5 Marks·Choose one option
Asked 2 times Key ↓
Consider the following JavaScript program that demonstrates web storage operations:
1. A
2. B
3. C
4. D
Read the passage below, then answer Q31–Q32
Answer the given subquestions.
Q31MCQ3 Marks·Choose one option
Key ↓
1. AThe password will be stored as plain text "mypassword123" in the database because WTF_CSRF_ENABLED = False
2. BThe password will be hashed using bcrypt with the salt "this-is-a-salt-key" before being stored in the database
3. CThe password will be hashed using SHA-256 algorithm since no specific hashing method is configured
4. DThe password will be encrypted using the SECRET_KEY and stored in the session only
Q32MCQ4.5 Marks·Choose one option
Key ↓
1. A200, 200, 200
2. B200, 401, 403
3. C200, 401, 401
4. D401, 401, 403

Official Key

Master Answer Key & Explanations

Official answer keys from IIT Madras BS past papers. Click any question to review.

Reveal Key

Q1C

Q2B

Q3B

Q4B

Q5A, C

Q6B, C

Q7B, C

Q8A, C, D

Q9B

Q10D

Q11C

Q12C

Q13A

Q14A

Q15B

Q16A

Q17C

Q18C

Q19A, B, C

Q20A, C, D

Q21A, B, D

Q22B, C, D

Q23A, C, E

Q24A

Q25B

Q26A

Q27B

Q28A

Q29B

Q30A

Q31A

Q32B

Questions and answer keys are reproduced from the official IIT Madras BS papers. BTechi is not affiliated with IIT Madras.