1. Question 1

Which HTTP method replaces the entire resource?

• ❌ GET

• ❌ DELETE

• ❌ POST

• ✔️ PUT

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2. Question 2

Fetch API improvement:

• ✔️ Remove the Content-Type header.

• ❌ Change method to POST.

• ❌ No changes needed.

• ❌ Add trailing slash.

Reason: GET requests should not have a Content-Type header because they have no body.

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3. Question 3

How does @RequestMapping add flexibility?

• ❌ Only maps one method.

• ❌ Automatically routes by content type.

• ❌ Only for GET.

• ✔️ Allows one endpoint to respond to multiple HTTP methods.

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4. Question 4

Validate incoming request data:

• ❌ Include try-catch

• ❌ @RequestParam

• ✔️ @Valid

• ❌ Remove @PostMapping

Correct: public String registerUser(@Valid User user)

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5. Question 5

Benefit of HATEOAS:

• ❌ Automatically validate requests

• ❌ Handles all errors

• ❌ Faster response time

• ✔️ Clients navigate via links included in responses

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6. Question 6

Fix the DELETE endpoint:

• ❌ Use return

• ❌ Change String to Integer

• ❌ Change to @RequestMapping

• ✔️ Add @PathVariable

Correct:

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7. Question 7

Best AWS service for storing large files:

• ❌ EC2

• ✔️ S3

• ❌ Lambda

• ❌ RDS

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8. Question 8

AWS Lambda auto-scales based on requests:

• ❌ False

• ✔️ True

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9. Question 9

PUT request body in Fetch API:

• ✔️ JSON.stringify(data)

• ❌ data.toJSON()

• ❌ JSON.parse(data)

• ❌ data

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10. Question 10

AWS service used with JDBC MySQL endpoint:

• ❌ Lambda

• ✔️ RDS

• ❌ S3

• ❌ EC2

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📘 Summary Table

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